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

Spider Wasp - Anoplius semirufus

Spider Wasp - Anoplius semirufus
Mill Lake, east of Killarney, Manitoulin District, Ontario, Canada
June 29, 2005
Size: ~4mm
A small wasp, which looks like a pompilid to me. Sitting on a sand beach.


Anoplius semirufus
At first I noticed two things about this wasp. If you look at the pygidium VERY closely you can see a few really strong bristles that are pointing backward...Anoplius. Now to narrow it down to subgenus by elimination. Marked with orange: not Anoplius (s.s.), Notiochares, or Anopliodes since all known species of those subgenera are black. That means it has to be either in the subgenus Pompilinus or Arachnophroctonus. Without wing veins that is a tough task. I can give two pieces of supporting evidence on what I think is a very solid ID. It has a lot of silvery pubescence (notice the face and legs) and it is found on a BEACH that has soil in particles you can make out, which is about as loose as you can get. This I think is Anoplius semirufus, which is in a species group that contains two species that are marked with orange that are very attached to loose soil, especially beaches. The only character I could use to separate these two species (the other is A. apiculatus) is the VERY shiny abdomen of A. semirufus.

I agree.
Definitely a spider wasp, possibly an Arachnospila sp.

Thanks for the ID, Eric.

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