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Subgenus Stenus

Stenus sculptilis Casey - Stenus sculptilis Stenus? - Stenus colon Stenus colon Say - Stenus colon Rove Beetle - Stenus Rove beetle  - Stenus Stenus laccophilus Stenus latissimus hatchi (Sanderson) - Stenus latissimus - male Stenus latissimus hatchi (Sanderson) - Stenus latissimus - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Staphyliniformia)
Superfamily Staphylinoidea
Family Staphylinidae (Rove Beetles)
Subfamily Steninae (Water Skaters)
Genus Stenus
No Taxon Subgenus Stenus
Size
Usually 4 mm or more
Identification
a non-phylogenetic assemblage for practical reasons.

Distinguished by abdomen bordered laterally, tarsi longer than half of tibia, and with penultimate segment simple (comment here).