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Reviewed by Tim Boyle

Tiny Ants in Your House: The Under-4mm ID Guide for New Hampshire Homes

6 species — and the wrong spray makes 2 of them dramatically worse

Tiny ants in a New Hampshire home are most likely one of six species all under 4 mm: pavement ant, odorous house ant, pharaoh ant, thief ant, little black ant, or Brachymyrmex rover ant. The most dangerous misidentification is pharaoh ant (pale yellow, 1.5–2 mm) mistaken for thief ant — pharaoh ants bud explosively when sprayed, turning one nest into 5–10 satellite nests within weeks. The definitive test: count antenna segments at 20× magnification. Pharaoh = 12 segments with a 3-segment club. Thief = 10 segments with a 2-segment club. For dark tiny ants, crush one — rotten-coconut smell confirms odorous house ant, which also should not be sprayed. Argentine ants are NOT established in NH; if someone tells you that's what you have, get a second opinion.

At a Glance

  • Short Answer: 6 tiny ant species under 4 mm in NH homes; the pharaoh-vs-thief antenna test (3-segment vs. 2-segment club) is the single most consequential ID
  • Key Fact: Pharaoh ants and odorous house ants both bud under spray pressure — DIY sprays multiply the infestation 2–5× rather than eliminating it
  • NH Relevance: Pharaoh ants in NH are indoor-only year-round (first NH record: Wetterer 2010) and concentrated in multi-unit and healthcare buildings in Manchester and Nashua
  • Action Needed: Identify the species before treating; pharaoh ant + ANY spray = colony budding within 2 weeks; do the antenna test first
Key Statistics

Tiny Ants in Your House: The Under-4mm ID Guide for New Hampshire Homes — The Numbers

6

Tiny ant species under 4mm in NH homes

2 vs 3

Antenna club: thief ant vs pharaoh ant (the critical test)

5×

Pharaoh ant colony multiplication after one spray (Feng et al. 2025)

9

Brachymyrmex antenna segments — unique among NE pest ants

Side-by-Side Comparison

Pharaoh Ant vs. Thief Ant

The pharaoh-ant vs. thief-ant differential is the single most consequential identification in NH home pest control. Both are tiny, pale yellow, and appear in kitchens and bathrooms. Misidentifying a pharaoh ant as a thief ant and applying a spray can cause the pharaoh ant colony to bud — multiplying from one nest into 5–10+ satellite nests within two weeks. The opposite error (treating thief as pharaoh, using bait only) delays resolution but does not cause catastrophic spread. When uncertain, default to the pharaoh-ant protocol.

Subject A

Pharaoh Ant

Monomorium pharaonis

Color and size
1.5–2 mm; pale yellow to light amber; DARK GASTER TIP — fastest naked-eye clue
Antennal segments (count at 20×)
12 SEGMENTS TOTAL — count from scape to tip
Antennal club — THE definitive diagnostic
3-SEGMENT CLUB — three terminal segments visibly enlarged at 20×
Food preference (field test)
Takes both sweet and grease/protein baits; preference shifts with brood demand
Distribution pattern indoors
Appears in multiple rooms simultaneously; trails persist in 2+ areas
Response to spray treatment
CATASTROPHIC BUDDING — any spray triggers sociotomy; colony multiplies 5× or more (Feng et al. 2025)
Correct treatment approach
Professional IGR-based bait (methoprene, pyriproxyfen) ONLY; coordinated multi-unit application

Bottom line — The antenna segment test is definitive: 12 segments + 3-segment club = pharaoh ant (call a professional, do not spray). 10 segments + 2-segment club = thief ant (DIY grease bait). The dark gaster tip on pharaoh ant and the strong grease preference on thief ant are useful supporting clues, but the antenna count at 20× magnification is the only test that holds under all lighting conditions and worker-size variation.

Deep Dive

The Full Picture

Tiny ants — any ant under 4 mm — are the most frequently misidentified category in NH home pest management, and the misidentification stakes are highest precisely here. Two of the six NH tiny-ant species (pharaoh ant and odorous house ant) respond to spray treatment with colony budding: the colony doesn't die, it splits into satellite nests that spread throughout the structure. Getting the species right before acting is not a nicety — it is the difference between a $40 bait-station fix and a multi-month professional remediation. This guide covers all six sub-4mm species regularly found in NH homes: pavement ant (2.5–4 mm), odorous house ant (2.4–3.3 mm), pharaoh ant (1.5–2 mm), thief ant (1.3–1.8 mm), little black ant (1.5–2 mm), and Brachymyrmex depilis (1.3–2 mm). One important disclaimer: Argentine ants (Linepithema humile), widely referenced in online pest content, are NOT established in NH 9. Winter soil temperatures below 5°C for more than 8.5 consecutive days cause colony collapse (Brightwell et al. 2010 9), and southern NH routinely provides these conditions for weeks each winter.
01

The Pharaoh Ant Budding Problem: Why This ID Matters Most

Pharaoh ants (Monomorium pharaonis) reproduce exclusively by budding — a process in which a queen plus some workers split off from the parent colony and relocate without a mating flight.
Read moreThis is their normal reproductive strategy. What makes pharaoh ants catastrophic in building pest management is that mechanical or chemical disturbance dramatically accelerates this process. Feng, Choe & Lee (2025) 5 experimentally demonstrated that 'essential oil-based insecticides exhibited a higher probability of inducing budding at all colony sizes when applied at a high rate. In contrast, pyrethroid-based insecticides increased the probability of inducing budding at a low application rate.' In plain terms: every over-the-counter spray product — natural or synthetic — can convert one nest into 5–10 satellite nests within two weeks. Each new satellite continues to bud under repeat spray exposure. A single initial spray event by an NH homeowner has been documented to expand a pharaoh ant infestation from two rooms to an entire floor of a multi-unit building 5. The only evidence-based treatment is slow-acting IGR bait (methoprene, pyriproxyfen) applied by a professional, coordinated across all affected units 45.
01
02

The Antenna Test: How to Distinguish Pharaoh from Thief Ant

The definitive diagnostic requires 20× magnification — a USB microscope ($15–20), a phone macro lens adapter, or a quality hand loupe.
Read moreCapture one ant alive in a clear glass jar (tape over top with a tiny breathing hole) and photograph the antenna against a white background. Count ALL segments from the scape (the long first segment that attaches to the head) through to the tip. Pharaoh ant 5: 12 SEGMENTS TOTAL, with the last three (the club) visibly enlarged. Thief ant 8: 10 SEGMENTS TOTAL, with the last two (the club) visibly enlarged. The 2-segment vs. 3-segment club is the critical count even if total segment count is difficult. Color clue: pharaoh ant has a distinct dark gaster tip that thief ant lacks. Behavioral clue: place peanut butter and a sugar bait side by side — thief ants ('grease ants') strongly prefer the peanut butter; pharaoh ants take both. When any doubt remains, treat the situation as pharaoh ant until confirmed otherwise 5.
02
03

Odorous House Ant: The Crush Test and the No-Spray Rule

OHA (Tapinoma sessile) produces the rotten-coconut or blue-cheese odor from 6-methyl-5-hepten-2-one — documented by Penick et al.
Read more(2015) 3 to be approximately 100× more abundant in OHA headspace than other volatiles. The crush test on a white paper towel takes three seconds and is definitive. Once OHA is confirmed, the treatment rule is absolute: no repellent sprays. Buczkowski (2010) 7 documented that urbanized OHA populations show extreme polygyny and polydomy, with sub-nests rapidly relocating in response to disturbance. Buczkowski & Bennett (2008) 6 showed that repellent pyrethroid sprays trigger colony scattering in OHA's polydomous supercolonial structure. Non-repellent sweet bait gel (borate or fipronil gel applied as a gel drop, NOT spray) placed on the active trail is the correct DIY approach. Outdoor nest treatment under stones and mulch prevents re-establishment from the exterior 67.
03
04

Pavement Ant: The Low-Stakes Species That Tolerates Standard IPM

Pavement ants (Tetramorium immigrans, formerly T.
Read morecaespitum per Wagner et al. 2017 1) are the good news in the tiny-ant identification landscape. Unlike OHA and pharaoh ants, pavement ants do not bud aggressively under spray pressure and respond well to standard perimeter IPM: a non-repellent perimeter residual (fipronil or dinotefuran) applied along the foundation plus sweet granular bait along active trails. The parallel rugae ('fingerprint grooves') on the head and pronotum are visible at 10× and distinguish pavement ants from the other dark tiny ants in NH. Two clearly visible petiolar nodes (versus OHA's concealed node) complete the ID. This is the one tiny-ant situation where DIY-first is genuinely the right call and professional escalation is rarely needed within the first 14 days 1.
04
05

Thief Ant: The FDA-Listed Grease Ant That Hides Near Other Ant Nests

Thief ants (Solenopsis molesta) earned their name from their kleptoparasitic behavior — they nest adjacent to larger ant colonies (Tetramorium, Formica) and steal brood and food from their neighbors.
Read moreIndoors, they appear in kitchen cabinets near grease and protein sources. Alongside pharaoh ants, thief ants are the only two ant species on the FDA 'Dirty 22' list of arthropods associated with foodborne pathogen transmission (Sulaiman et al. 2012 8). The 10-segment antenna with 2-segment club separates them definitively from pharaoh ants; the grease preference separates them behaviorally. DIY grease-borate bait (peanut-butter-matrix bait with boric acid) placed on active trails is effective. Spray of any identified outdoor nest location is reasonable — unlike OHA and pharaoh, thief ants do not bud in response to disturbance at typical spray rates 8.
05
06

Brachymyrmex and Little Black Ant: Low-Urgency Small Species

Brachymyrmex depilis is the only NH pest ant with 9 antennal segments — immediately diagnostic when confirmed at 20× magnification.
Read moreIt is a rare indoor pest almost always associated with foundation moisture, and removal of the moisture source typically resolves the issue without chemical treatment. Little black ants (Monomorium species) are shiny black, 1.5–2 mm, and generalists — easily sorted from the pale-yellow tiny ants by color alone. Ellison et al. (2012) 10 note that M. emarginatum and M. viridum are the dominant native NE Monomorium; true M. minimum is less confirmed in NH. Both respond to standard dual-bait IPM (sweet + grease) and perimeter spray. Neither species carries structural risk or the budding risk associated with OHA and pharaoh ants 10.
06
07

Citronella Alates: The Termite Lookalike That Isn't

Every fall (September–October) and sometimes spring (April–May), NH homeowners discover yellow flying ants emerging from basement cracks and immediately assume termites.
Read moreThese are almost always citronella ants (Lasius claviger or L. interjectus) — outdoor subterranean ants whose nuptial flight happens to route through foundation cracks. Penn State Extension explicitly notes they are 'frequently confused with termites when they swarm into the living areas of homes.' The three-second field test: elbowed antennae + pinched waist + lemon/citronella odor when crushed = citronella ant, no structural damage, no treatment needed. Termites: straight bead-like antennae + no pinched waist + four equal-length wings + no odor + creamy-white worker color. One correct ID saves a homeowner $1,500–$3,500 in unnecessary termite treatment. Vacuum the alates, seal the foundation crack, done 10.
07
08

The Step-by-Step Tiny Ant ID Protocol for NH Homeowners

Step 1: Capture one ant alive in a clear glass jar.
Read morePhotograph it next to a US dime (17.91 mm) for size scale. Step 2: Color triage. Dark brown or black: likely pavement, OHA, or little black ant. Crush one on white paper — coconut smell = OHA (bait only); no smell + rugae on head = pavement (spray tolerated); no smell + shiny black = little black (standard bait). Pale yellow: likely pharaoh, thief, or Brachymyrmex — proceed to Step 3. Step 3: Behavior observation. Pale yellow ants in 2+ rooms simultaneously or persisting after a grease bait trial → treat as pharaoh ant, call professional. Pale yellow ants in one room with strong peanut-butter preference → thief ant, proceed with grease bait. Step 4: Antenna count at 20×. 9 segments = Brachymyrmex (address moisture). 10 segments + 2-segment club = thief ant (grease bait). 12 segments + 3-segment club = pharaoh ant (call professional immediately). Step 5: Do NOT apply any spray before confirming species — the downside risk for OHA and pharaoh ant far exceeds the upside of a quick kill on contact 56.
08

Bottom line — The tiny-ant ID problem in NH has a clear hierarchy: get the color first, then crush-test the dark ones, then do the antenna count on the pale-yellow ones. Two species (OHA and pharaoh) punish the spray-first approach with colony multiplication. Four species (pavement, thief, little black, Brachymyrmex) respond to standard DIY. One species (citronella alate) needs nothing but a vacuum and caulk. The 60 seconds spent on a crush test or antenna count saves days of follow-up treatments.

NH Carpenter Ant Species

Carpenter ants aren't one species — they're four

Six ant species under 4 mm regularly appear in NH homes. Urgency and treatment approach differ sharply by species — which is why identification is mandatory before any treatment decision. Note: Argentine ant (Linepithema humile) is NOT established in NH; winter soil temperatures below 5°C for more than 8.5 consecutive days cause colony collapse (Brightwell et al. 2010 [9]), and southern NH routinely exceeds this threshold for weeks. Misidentification as Argentine ant leads to ineffective product purchases.

Species 1

Pavement Ant

Tetramorium immigrans

Size
2.5–4 mm
Color
Uniform dark brown to nearly black; legs and antennae slightly paler
Nest
Outdoor soil under pavement, foundation slabs, driveway joints; occasional indoor wall voids near heat sources
Aggression
NH Prevalence

Distinguishing feature

Parallel longitudinal rugae ('fingerprint' grooves) on head and pronotum — visible at 10× magnification. Two clearly visible petiolar nodes. Small propodeal spines on upper-rear thorax. 12-segment antenna with a 3-segment club. No odor when crushed. Taxonomic note: formerly T. caespitum in pre-2017 literature; all NH pavement ants are now T. immigrans per Wagner et al. 2017 [1]. Treatment: tolerates contact insecticides unlike OHA and pharaoh; perimeter spray + sweet granular bait works. Urgency: 2/5.

Species 2

Odorous House Ant (OHA)

Tapinoma sessile

Size
2.4–3.3 mm
Color
Uniform dark brown to nearly black, slightly shiny
Nest
Indoors in wall voids near plumbing, under bath and kitchen subfloors, in insulation; outdoors under stones, logs, mulch, landscape timbers
Aggression
NH Prevalence

Distinguishing feature

CRUSH TEST: rotten-coconut or blue-cheese odor — dominant volatile is 6-methyl-5-hepten-2-one (~100× more abundant than other volatiles per Penick et al. 2015 [3]). Petiolar node flattened and concealed beneath overhanging first gastral tergite — in lateral view the gaster appears to sit directly on the thorax (hence sessile). 12-segment antenna without a defined club. CRITICAL: repellent sprays trigger budding/colony scattering (Buczkowski & Bennett 2008 [6]). Use non-repellent sweet bait gel (borate or fipronil gel) only. Urgency: 3/5.

Species 3

Pharaoh Ant

Monomorium pharaonis

Size
1.5–2 mm
Color
Pale yellow to light amber, often slightly translucent; dark gaster tip — the dark tip is the fastest color diagnostic vs. thief ant
Nest
Strictly indoor in NH — wall voids near plumbing, behind baseboards, inside electrical outlets, near hot-water pipes; cannot survive NH winters outdoors
Aggression
NH Prevalence

Distinguishing feature

12-SEGMENT ANTENNA WITH DISTINCT 3-SEGMENT CLUB — this is the single definitive character separating pharaoh from thief ant. Two petiolar nodes. Very small. Dark gaster tip. Wetterer (2010) [4] published the first NH record: 'in temperate areas, it is found almost exclusively indoors.' NH cases concentrated in hospitals, multi-unit housing, nursing homes. CRITICAL: colonies reproduce exclusively by budding — any spray product (pyrethroid or essential oil) triggers sociotomy; Feng, Choe & Lee (2025) [5] showed that even low application rates significantly increase budding probability at all colony sizes. Professional IGR-based bait treatment required. Urgency: 5/5.

Species 4

Thief Ant (Grease Ant)

Solenopsis molesta

Size
1.3–1.8 mm
Color
Pale yellow to honey-amber; gaster sometimes slightly darker but WITHOUT the distinct dark gaster tip of pharaoh ant
Nest
Soil cracks, under stones, in or near nests of larger ants (kleptoparasitism); indoors in wall voids, behind baseboards, under cabinets near grease sources
Aggression
NH Prevalence

Distinguishing feature

10-SEGMENT ANTENNA WITH A SHARPLY DEFINED 2-SEGMENT CLUB — the single most reliable separator from pharaoh ant. Eyes very small (4–6 ommatidia). Strong grease/protein preference ('grease ants'): peanut butter, bacon grease, hot dog are useful field-test baits. Listed alongside pharaoh ant on FDA 'Dirty 22' arthropods associated with foodborne pathogen transmission (Sulaiman et al. 2012 [8]). Treatment: grease/protein-based borate bait works; spray treatment of outdoor foundation nest if located. Confirm ID before treating to avoid pharaoh-ant misdiagnosis. Urgency: 3/5.

Species 5

Little Black Ant

Monomorium minimum / Monomorium emarginatum

Size
1.5–2 mm
Color
Shiny black to dark brown throughout; monomorphic
Nest
Outdoor in soil, rotting wood, under stones; indoor in wall voids, woodwork, masonry; generalist diet (sweets, grease, honeydew, insects)
Aggression
NH Prevalence

Distinguishing feature

Shiny black color is the fastest visual separation from pharaoh ant (pale yellow) and thief ant (pale yellow). Has 12-segment antenna with 3-segment club — same as pharaoh ant — making color the key distinction at this size class. Ellison et al. (2012) [10] emphasize M. emarginatum and M. viridum as the dominant native NE Monomorium; true M. minimum records in NH are sparse but the species occurs in the broader NE ant fauna. Treatment: sweet liquid bait + perimeter non-repellent spray; less budding-prone than OHA or pharaoh. Urgency: 2/5.

Species 6

Hairless Rover Ant (Little Yellow Ant)

Brachymyrmex depilis

Size
1.3–2 mm
Color
Pale yellow to pale amber, almost translucent — similar to pharaoh and thief ant
Nest
Predominantly subterranean — soil, under stones, in rotting wood; rare indoor pest, usually near foundation moisture sources in basements
Aggression
NH Prevalence

Distinguishing feature

9-SEGMENT ANTENNA — UNIQUE among New England pest ants. Every other NH tiny pale-yellow ant (pharaoh: 12-segment; thief: 10-segment) has more antennal segments. Single petiolar node concealed beneath gaster (profile similar to OHA but pale yellow not dark). The aggressive B. patagonicus (rover ant of the southern U.S.) is NOT in NH. Brachymyrmex as an indoor pest is almost always associated with foundation moisture. Treatment: address moisture source; DIY rarely needed. Urgency: 1/5.

Visual Identification

Size and Anatomy Reference: 6 NH Tiny Ants at Scale

All measurements relative to a US dime (17.91 mm diameter). Tiny ants under 4 mm are difficult to ID without magnification — a smartphone macro lens or a 10–20× loupe provides sufficient resolution for most field tests. The antenna inset descriptions below highlight what to look for at each magnification level.

Sign 1

Pavement Ant — Size and Head Texture

At 10× magnification, the parallel longitudinal rugae on the head capsule look like fingerprint grooves running from front to back. Workers are 2.5–4 mm — about the width of a US dime's border lettering. Two petiolar nodes are visible even with the naked eye on a worker held under bright light. Small propodeal spines project from the upper-rear thorax.

Sign 2

Odorous House Ant — The Hidden Node

The defining anatomy is best seen in strict lateral view: the petiolar node is flattened and tucked beneath the overhanging first gastral tergite, making the gaster appear to sit directly on the thorax with no visible waist bump. Workers are 2.4–3.3 mm. The crush test is faster than visual inspection — rotten-coconut or blue-cheese odor is diagnostic. Photograph the lateral profile if sending to an extension office for confirmation.

Sign 3

Pharaoh Ant — Pale Yellow with Dark Gaster Tip

Workers are 1.5–2 mm — about the thickness of two credit cards. The pale yellow to light amber body with a visibly darker gaster tip is the fastest naked-eye clue. At 20× magnification, the 3-segment antennal club (three terminal segments clearly enlarged relative to the rest of the funiculus) is unambiguous. The dark gaster tip is not present on thief ants, making it a useful rapid-sort feature before magnification.

Sign 4

Thief Ant — Antenna Count at 20×

Workers are 1.3–1.8 mm — slightly smaller than pharaoh ant on average, though ranges overlap. At 20× magnification, the 2-segment antennal club is distinguishable from pharaoh ant's 3-segment club; the total of 10 antenna segments (vs. pharaoh's 12) is the definitive character. Eyes are very small — 4–6 ommatidia visible at high magnification. Place peanut butter and sugar bait side by side to confirm preference: thief ants are 'grease ants' that prioritize the peanut butter.

Sign 5

Brachymyrmex Rover Ant — 9-Segment Antenna

Workers are 1.3–2 mm and pale yellow to nearly translucent — visually similar to both pharaoh and thief ants at first glance. The definitive diagnostic is the 9-segment antenna, unique among NH pest ants. At 20× magnification, count from the scape (first, long segment) through the funiculus — 9 total. The single petiolar node is concealed beneath the gaster (similar to OHA) but the pale color immediately distinguishes them. Rare indoor pest; usually found near foundation moisture in basements.

Sign 6

Size Comparison — 6 Species Next to a US Dime

At actual size, all six species fit within the thickness of the dime's lettering (approximately 1.3–4 mm). The size overlap between pharaoh ant, thief ant, and Brachymyrmex (all 1.3–2 mm) is complete — color and anatomy, not size, are the ID criteria at this scale. Dark ants (pavement, OHA, little black) can be sorted from pale-yellow ants (pharaoh, thief, Brachymyrmex) by eye; further separation requires magnification.

Decision Tree

Should you call a pro?

Four questions to identify your tiny ant species and determine the correct treatment approach. Start here if your ants are clearly under 4 mm. If ants are larger (over 6 mm), use the common-ants-in-new-hampshire decision tree or the signs-of-carpenter-ants guide.

What size are the ants?

Prevention Playbook

How to stop carpenter ants from coming back

1

Eliminate standing water and moisture at the foundation — pharaoh ants, OHA, and Brachymyrmex rover ants are all moisture-driven; fixing drips under sinks, around toilets, and at foundation cracks removes the environmental trigger for indoor colonization.

2

Store all food in sealed containers and clean up grease residue on stovetop and beneath appliances — thief ants ('grease ants') are specifically attracted to protein and fat; pharaoh ants are attracted to both grease and sweets at different brood stages.

3

Seal foundation cracks, plumbing penetrations, and utility entries with caulk or hydraulic cement — pavement ants and OHA enter primarily through these gaps; pharaoh ants follow electrical conduit and plumbing chases from unit to unit in multi-unit buildings.

4

Remove mulch, landscape timbers, and stones within 18 inches of the foundation — these are primary OHA nesting sites that feed indoor colonies; treating exterior OHA nests reduces indoor trail intensity within 1–2 weeks.

5

For multi-unit buildings: establish a building-wide ant monitoring program rather than unit-by-unit spraying — pharaoh ant infestations in any unit require coordinated treatment across all connected units, and uncoordinated spray events in individual units drive budding into untreated areas.

6

Do not apply any over-the-counter spray product to tiny pale yellow ants indoors before confirming species identity — the single most cost-effective prevention for pharaoh ant catastrophic infestation is this one rule, applied before the mistake happens rather than after.

Local Context

Why Tiny Ant ID Is Especially High-Stakes in Southern NH

Manchester and Nashua's dense multi-unit housing stock concentrates pharaoh ant risk — the species requires continuous indoor heating year-round and propagates through connected wall cavities and plumbing chases across multiple units. A pharaoh ant infestation in one unit of a Manchester triple-decker that is treated with spray by one tenant can distribute satellite nests to four adjacent units within a month. This is why Wetterer (2010) [4] documented NH's first pharaoh ant record in a heated institutional building rather than a residential home. OHA is ubiquitous across all five service counties; pavement ants dominate urban and suburban NH wherever there is paved infrastructure.

Key Local Data

Per NPMA (Hansen 2012), 62% of professional pest managers nationally treat OHA infestations — making it the second most-treated ant species in the U.S., ahead of pavement ants (59%) and behind carpenter ants (66%). Southern NH's suburban species mix closely mirrors this national ranking.

Common Questions

Frequently Asked

Sources & References

Where this data comes from

  1. [1]
    Wagner, H.C., Arthofer, W., Seifert, B., Muster, C., Steiner, F.M., & Schlick-Steiner, B.C. 2017. Light at the end of the tunnel: Integrative taxonomy delimits cryptic species in the Tetramorium caespitum complex (Hymenoptera: Formicidae). Myrmecological News 25: 95–129.(2017)
  2. [2]
    Klotz, J.H., Hansen, L., Pospischil, R., & Rust, M. 2008. Urban Ants of North America and Europe: Identification, Biology, and Management. Cornell University Press, Ithaca, NY.(2008)
  3. [3]
    Penick, C.A. et al. 2015. Characterization of the volatile components of Tapinoma sessile (Hymenoptera: Formicidae); 6-methyl-5-hepten-2-one identified as the dominant headspace compound (~100× more abundant than other volatiles).(2015)
  4. [4]
    Wetterer, J.K. 2010. Worldwide spread of the pharaoh ant, Monomorium pharaonis (Hymenoptera: Formicidae). Myrmecological News 13: 115–129. [first known NH pharaoh ant record; indoor-only in temperate areas](2010)
  5. [5]
    Feng, Y., Choe, D.-H., & Lee, C.-Y. 2025. Effects of over-the-counter aerosol products on sociotomy of Monomorium pharaonis (Hymenoptera: Formicidae). Journal of Economic Entomology 118(5): 2526–2535.(2025)
  6. [6]
    Buczkowski, G. & Bennett, G.W. 2008. Seasonal polydomy in a polygynous supercolony of the odorous house ant, Tapinoma sessile. Ecological Entomology 33: 780–788.(2008)
  7. [7]
    Buczkowski, G. 2010. Extreme life history plasticity and the evolution of invasive characteristics in a native ant. Biological Invasions 12(9): 3343–3349.(2010)
  8. [8]
    Sulaiman, I.M. et al. 2012. Identification of selected ant species (Monomorium pharaonis and Solenopsis molesta) on the FDA's 'Dirty 22' list of arthropods associated with foodborne illness. Journal of Food Protection 75(8): 1447–1452.(2012)
  9. [9]
    Brightwell, R.J., Labadie, P.E., & Silverman, J. 2010. Northward expansion of the invasive Linepithema humile in the eastern United States is constrained by winter soil temperatures. Environmental Entomology 39(5): 1659–1665. [Argentine ant NOT in NH](2010)
  10. [10]
    Ellison, A.M., Gotelli, N.J., Farnsworth, E.J., & Alpert, G.D. 2012. A Field Guide to the Ants of New England. Yale University Press, New Haven, CT. 416 pp.(2012)
  11. [11]
    Hansen, L., NPMA. 2012. Exploring America's #1 Nuisance Pest. National Pest Management Association. [66% carpenter ant, 62% OHA, 59% pavement ant PMP treatment rankings](2012)
  12. [12]
    AntWiki. New England Ant Identification key; species accounts for Tetramorium immigrans, Tapinoma sessile, Monomorium pharaonis, Solenopsis molesta, Brachymyrmex depilis, Lasius claviger, Lasius interjectus.(2024)
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