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Genus Hylis

Hylis terminalis Hylis frontosus Hylis californicus Van Dyke - Hylis californicus Hylis californicus Van Dyke - Hylis californicus Eucnemidae - Hylis terminalis Eucnemid - Hylis terminalis Mating Click Beetles - Hylis terminalis - male - female Sylvanelater ? - Hylis frontosus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Elateriformia)
Superfamily Elateroidea (Click, Firefly and Soldier Beetles)
Family Eucnemidae (False Click Beetles)
Subfamily Melasinae
Tribe Epiphanini
Genus Hylis
Synonyms and other taxonomic changes
(=Hypocaelus)
Numbers
Aproximately 20 species are distributed world wide. Of those, four species thrives in the Nearctic region.
Size
3.0-6.5 mm long.
Identification
simple hypomera along with stout mandible and flattened, serrated antennomeres 4-10 will distinguish the group from its close relative, Epiphanis.


Key:

1 Frons simple or with median impression............................................................................3
1' Frons with median keel............................................................................................2

2 Eastern US. Legs mostly dark brown.........................................................H. terminalis (LeConte)
2' Western US. Legs mostly yellowish to pale brown...................................................H. irvinei Muona

3 Frons simple. 11th antennomere in males extremely elongate. Antennomeres 8-11 slightly elongate in females.
Pronotum shiny...........................................................................H. californicus (Van Dyke)
3' Frons with median impression. Pronotum densely punctate.........................................H. frontosus (Say)
Range
One species is a California endemic. Second species is distributed along the west coast of North America, north of Mexico. Two others are widely distributed in eastern U.S. and Canada.
Habitat
Largely found in forested areas.
Season
Mid June through the end of August.
Food
Larvae have been reported developing in various deciduous wood like elms, hickories and beech.
Print References
Muona, J. 2000. A Revision of the Nearctic Eucnemidae. Acta Zoologica Fennica. 212: 106 pp.