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Subgenus Chthonolasius

reproductives and workers - Lasius umbratus Lasius umbratus - Lasius speculiventris - female Ants, Aphids and Larva - Lasius umbratus Ant - Lasius umbratus Lasius - Lasius umbratus - female Ant - Lasius umbratus ants - Lasius umbratus Ant (unknown)21 - Lasius umbratus
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.
Type species: Formica umbrata Nylander
Most of North America.
More subterranean than the subgenus Lasius, some build large earthen mounds.
Mostly honeydew derived from subterranean plant lice and mealybugs.
"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