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

National Moth Week photos of insects and people. Here's how to add your images.

Photos of 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


TaxonomyBrowseInfoImagesLinksBooksData
Photo#214928
Square-headed Wasp - Crossocerus nitidiventris - female

Square-headed Wasp - Crossocerus nitidiventris - Female
Groton, Middlesex County, Massachusetts, USA
August 2, 2008
Came to the porch light.

Moved
Moved from Crabro.

Crossocerus nitidiventris, female (MA)
After checking the collection I have to revise my ID. This is C. nitidiventris. It is an unusual species in its genus because of the yellow markings on the abdomen (only present in one other species). What makes this this wasp distinctive is: yellow spots on smooth area of propodeum, yellow prepectus (that's the area just behind the pronotal lobe), rounded pronotal angles (excludes many other crabronines with similar markings), and yellow spots of similar size on terga 2-5. Excellent find, Tom! This is quite a rare species!

 
That's great!
When I see these different wasps, I'm not familiar enough with them to know if it's a common species I've seen many times, or something rare like this.
Matthias thanks for going to your collecyion to identify this one. I don't think anyone else that visits bugguide would have been able to get the species on this one.

Crabro
To my knowledge there are no Ectemnius with yellow spots on the propodeum in the NE (this also rules out Lestica). Should be a Crabro then, perhaps in the hilaris species group.

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