Field
Introduction.
The common name of the field ant probably comes from their abundance in outdoor situations. This is the largest genus of ants in America north of Mexico, containing about 0ne-sixth of our entire ant fauna. Some species are commonly called thatching ants because of their habit of constructing a mound or thatch of plant material, often grass. They are found throughout the United States.
Recognition.
Workers polymorphic, 1/8-3/8" long. Color brown, black, reddish or a combination of these colors. Head
with ocelli distinct, posterior border not indented. Antenna 12-segmented, without a club. Thorax lack
spines, profile not evenly rounded on upper side. Pedicel 1-segmented, node usually rounded dorsally.
Gaster with anal opening round, surround by circlet of hairs. Stingers absent, but will bit and spray
formic acid if provoked.
Habits.
Inside, these ants usually construct their nest in wall voids especially around hot water pipes and
heaters, in crevices around sinks, cupboard, etc. These ants prefer sweets but also eat foods with
high protein content and grease such as meats and cheese.
Outside, they are often found in the nest of larger ants, in exposed soil, but mostly under objects.
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