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Species Page - Lasius umbratus
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scientific name    Lasius umbratus    

Prefer moister soils, but are found in both grassland and forested areas. In Alberta only two localities have been found one by Lake Newell and the other in Aspen Parkland near Hay Lakes.

May through to September.

Workers are ~3.0-4.5 mm in length and are a golden yellow color. The abdomen has erect hairs and the second gastric tergite is covered with pubescence. The eyes are small with slightly more then 65 but nevermore the 100 (Wheeler and Wheeler, 1963).

life history
Subterranean most of the time, with tunnels around roots to house aphids and coccids. Have nuptial flights in September and new queens are known to be social parasites on Lasius group complexes niger and flavus.

Not of concern.

diet info
Almost exclusively farm aphids, but will scavenge fallen foods and insects.

Found throughout the east side of the Rocky Mountains. In Alberta are rare and have been found only once around the Hay Lakes area, this rarity may be a result of their subterranean existence and are most like more common then have been reported.

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Specimen Info
There are 2 specimens of this species in the online database
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Specimen List (2)


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