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Species Ilybius biguttulus

Dytiscid - Ilybius biguttulus Dytiscid - Ilybius biguttulus Ilybius biguttulus (Germar) - Ilybius biguttulus - male Ilybius biguttulus (Germar) - Ilybius biguttulus - male Ilybius sp.? - Ilybius biguttulus - male Predaceous Diving Beetles - Ilybius biguttulus Predaceous Diving Beetles - Ilybius biguttulus Ilybius biguttulus elytral sculpture - Ilybius biguttulus - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Dytiscidae (Predaceous Diving Beetles)
Subfamily Agabinae
Genus Ilybius
Species biguttulus (Ilybius biguttulus)
Size
8.4-11.4mm (1)
Identification
Appears totally black with 1 or 2 triangular light markings near elytral margins. Eye notched in front. (1)

Striations on hind coxal plate and side are diagnostics. Hind margin of pronotum and head have a reddish, rather transparent margin. (2)
Range
Atlantic Canada and New England to Georgia, west to Ontario, Dakotas, Colorado, Utah, and New Mexico. (1)
Habitat
sun-warmed ponds with densely vegetated margins (1)
Remarks
Adults active late spring and summer; comes to lights. (1)
Works Cited
1.Beetles of Eastern North America
Arthur V. Evans. 2014. Princeton University Press.
2.The Beetles of Northeastern North America, Vol. 1 and 2.
Downie, N.M., and R.H. Arnett. 1996. The Sandhill Crane Press, Gainesville, FL.