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

Upcoming Events

Discussion, insects and people from the 2018 BugGuide 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

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

rippled antenna wasp - Colocistis - male

rippled antenna wasp - Colocistis - Male
Lordsburg, Hidalgo County, New Mexico, USA
July 2, 2007
Size: 12-14 mm
came to light

Colocistis sp.
Moved from Brachycistidinae.

This is a Brachycistidinae male. Its a nocturnal tiphiid. The females are wingless and burrow in the sand, only coming out to breed during specific seasons. The males commonly come to lights at night, sometimes by the thousands.

Thanks, William.
How can you tell it's in subfamily Brachycistidinae? Are the "rippled" antennae distinctive? (there's no info on the Guide page)

It lacks the felt line on the
It lacks the felt line on the second tergite that Mutillidae and Bradynobaenidae have, which rules out those two families. Its one of the few nocturnal hymenoptera in the west.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.