|scientific name Formica obscuripes |
Nest in grasslands devoid of cover (Creighton, 1950).
Found through May to September.
Workers are ~3.2-7.5 mm in length, with dark brown head, dark reddish brown thorax and black abdomen (Wheeler and Wheeler, 1963). Erect hairs are present on the hind tibia and cover all surfaces, the erect hairs on the thorax are unequal and cephalic hairs are just slightly less abundant as on the thorax (Wheeler and Wheeler, 1963).
Not well known, are thought to be temporary social parasites on other Formica rufu group species.
Not of concern.
Omnivorous, but predate heavily on insects; will also farm aphids.
As far south as Colorado, east to Wisconsin and north to northern British Columbia (Wheeler and Wheeler, 1963). In Alberta are found in the prairie regions (Sharplin, 1966).
Comments are published according to our submission guidelines. The EH Strickland Entomological Museum does not necessarily endorse the views expressed.