Vol·XXI · 21 Spp · Field-Verified
Macro photograph of an ant on damp forest soil
021
VOL·XXI2026/Q2
── Applied Myrmecology · Lab Manual № 21

ANTS
OF THE
STRUCTURE,
turf & SOIL.

Twenty-one species dissected for the people who actually have to deal with them, pest-management pros, extension agents, facility managers, and obsessive naturalists. Identification keyed to what you'll see on a flashlight beam at 11pm, not a museum drawer.

Reference plates · full species credits on each dossier
§ 02 · Selected dossiers

Featured
specimens.

All 21 species →
01
Red Imported Fire Ant (Solenopsis invicta) specimen photograph
Outdoor Mound / TurfSting

Red Imported Fire Ant

Solenopsis invicta

The most economically significant invasive ant in the United States: a stinging, mound-building South American species under federal quarantine, requiring a two-step bait-and-treat program.

6 baits · Polymorphic workersDossier →
02
Odorous House Ant (Tapinoma sessile) specimen photograph
Structural Invader

Odorous House Ant

Tapinoma sessile

The single most common household ant complaint in much of the U.S.; recognized by the rotten-coconut odor when crushed and by colonies that rapidly bud under pressure.

5 baits · 2.4–3.3 mm; uniformly dark brown to blackDossier →
03
Carpenter Ant (Camponotus spp. (chiefly C. pennsylvanicus, C. modoc, C. floridanus)) specimen photograph
Structural Invader

Carpenter Ant

Camponotus spp. (chiefly C. pennsylvanicus, C. modoc, C. floridanus)

Large wood-excavating ants and the second most economically damaging structural ant in the U.S. after termites; presence indicates a chronic moisture problem in the structure.

5 baits · PolymorphicDossier →
04
Tawny Crazy Ant (Nylanderia fulva) specimen photograph
Invasive Tramp

Tawny Crazy Ant

Nylanderia fulva

An invasive supercolony ant that reaches densities so extreme it smothers electrical equipment, displaces fire ants and native wildlife, and resists standard bait programs; fipronil perimeter applications are the current operational standard.

5 baits · ~2.3 mm; monomorphic; uniform reddish-brown 'tawny' color.Dossier →
05
Pharaoh Ant (Monomorium pharaonis) specimen photograph
Structural InvaderSting

Pharaoh Ant

Monomorium pharaonis

The classic indoor budding ant of hospitals, apartments, and commercial kitchens; the single most important rule is 'do not spray', repellent insecticides shatter the colony and turn one infestation into twenty.

5 baits · 1.5–2 mm; pale yellow to honey-orange with a darker gaster tip.Dossier →
06
Acrobat Ant (Crematogaster spp.) specimen photograph
Structural Invader

Acrobat Ant

Crematogaster spp.

A medium-small ant recognized by raising its heart-shaped gaster overhead when alarmed; commonly occupies abandoned carpenter ant or termite galleries and is therefore a useful indicator of pre-existing wood damage.

4 baits · ~2.5–4 mm; light brown to blackDossier →
§ 03 · Stance

Ants are not a single problem. A pharaoh colony budding under a hospital radiator and a fire-ant supercolony erupting through a pasture are different jobs, with different baits, different timing, and different ways to fail. This manual treats each species like a case file, not a cookie-cutter spray-and-pray.