Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Information, insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


TaxonomyBrowse
Info
ImagesLinksBooksData

Genus Oncocephalus

Oncocephalus geniculatus (Stål) - Oncocephalus geniculatus Diaditus(?) Specimen 2 - Oncocephalus geniculatus bug 55 - Oncocephalus - female Oncocephalus ? - Oncocephalus geniculatus Oncocephalus geniculatus Oncocephalus geniculatus Assassin Bug - Oncocephalus Heteroptera ID request - Oncocephalus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Heteroptera (True Bugs)
Infraorder Cimicomorpha
Family Reduviidae (Assassin Bugs)
Subfamily Stenopodainae
Genus Oncocephalus
Pronunciation
on-kuh-SEF-uh-luss
Synonyms and other taxonomic changes
Baebius Stål 1866, Spilalonius Stål 1868
Explanation of Names
Oncocephalus Klug 1830
Greek 'inflated head' (likely refers to the elevated ocellar area)
Numbers
4 spp. in our area, >200 spp. worldwide(1)
Size
13-18 mm
Identification
The strongly incrassate profemur is a key marker for visually separating this genus from other stenopodaines, most notably from Narvesus. The first rostral segment is not longer than the second, which separates Oncocephalus from Ctenotrachelus and Diaditus; these genera have the first rostral segment subequal or longer than the combined length of the second and third rostral segment. Stenopoda may be separated by its large size, its quadrate head and the unelevated ocellar region. Pnirontis, Pygolampis and Gnathobleda have distinct branched setigerous spines placed posteroventrally to the eye.
key to spp. in(1)
Range
primarily Old World (all but a dozen spp.); in our area, so. US (transcontinental)(1)
Remarks
come to lights
Works Cited
1.New nearctic species of Oncocephalus Klug (Heteroptera: Reduviidae: Stenopodainae)
Maldonado Capriles J. 1995. Proc. Ent. Soc. Wash. 97: 791-798.