|scientific name Formica impexa |
In Alberta have only been found along the bank of the Athabasca River.
Found through May to September.
Workers are ~3.3-6.0 mm in length and head and thorax are red and the abdomen is black (Wheeler, 1905). The epinotum of this species is very low and the erect hairs on the first gastric tergite are very evenly spaced (Wheeler and Wheeler, 1963). The femora and tibiae of Formica impexa along with the antennal scape lack erect hairs.
Are temporary social parasites of other Formica species (Fisher and Cover, 2007). New mated queens invade host nests, kill the queen and take over the nest as the host workers queen, however, unlike Polyergus or some sanguinea group Formica, they do not raid for slaves, and nests of Formica impexa once mature will have no other ant species in it (Wheeler and Wheeler, 1913 and Fisher and Cover, 2007).
Not of concern.
Omnivorous but are also above ground aphid farmers.
Ranges across most of western North America, (Wheeler, 1913).
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