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Subgenus Chthonolasius

Ant - Lasius umbratus - female Ants, Aphids and Larva - Lasius umbratus Ant - Lasius Ant - Lasius umbratus Ant - Lasius umbratus ants - Lasius umbratus Formicoidea - Lasius umbratus queen shaded fuzzy ant - Lasius umbratus - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
Superfamily Formicoidea (Ants)
Family Formicidae (Ants)
Subfamily Formicinae
Tribe Lasiini
Genus Lasius (cornfield ants, citronella ants)
No Taxon Subgenus Chthonolasius
Explanation of Names
Author: Ruzsky, 1912.
Identification
Type species: Formica umbrata Nylander
Range
Most of North America.
Habitat
More subterranean than the subgenus Lasius, some build large earthen mounds.
Food
Mostly honeydew derived from subterranean plant lice and mealybugs.
Remarks
"Workers are mainly yellowish and rarely seen above ground. These are parasitic species, whose young queens ... don't found new colonies of their own. Instead, they try to overtake colonies of other Lasius species (like L. neoniger) after overwintering. Indeed, the name Chthonolasius means 'killer' Lasius." [comment by Richard Vernier]
Internet References