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

Discussion of 2018 gathering

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

TaxonomyBrowseInfoImagesLinksBooksData
Photo#65992
Spider Wasp - Entypus unifasciatus - female

Spider Wasp - Entypus unifasciatus - Female
Essex, Ontario, Canada
July 22, 2006
Size: 30 mm
I had forgotten about these wasps until I ran across them today. Haven't seen them since July, 2004. The female had what I think was a Wolf Spider and put it under exposed grass roots on a caved-in, sandy hill.

Same as other
Obviously an E. unifasciatus, as in your other photo.

 
Question
How do you know it's a female?

 
A lot of specimens
When you look at a lot of specimens you get used to the differing proportions between males and females. Females are generally bigger have a proportionally larger head and more robust abdomen. Entypus unifasciatus is quite common in the area where I live and I've seen about 250 specimens just from Ohio (many more from other states). If you have a very good photograph (or a specimen in hand) you can also count antennal segments (females have 12, males have 13). Unfortunately the antennae in this photo are out of focus, but it's still a female just by judging proportions.

 
Thanks!
That's really interesting thanks alot. *Goes to write this down*

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