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

Giving Tuesday, November 30. Please consider a gift to BugGuide!

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

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

Previous events

Robber Fly - Laphria ventralis - male

Robber Fly - Laphria ventralis - Male
Port Angeles, WA, Clallam County, Washington, USA
September 21, 2008

Images of this individual: tag all
Robber Fly - Laphria ventralis - male Robber Fly - Laphria ventralis - male Robber Fly - Laphria ventralis - male Robber Fly - Laphria ventralis - male

ID confirmed ("probably") by
Dr. Robert A. Cannings, RPBio
Curator of Entomology
Royal British Columbia Museum
675 Belleville Street
Victoria, B.C., Canada V8W 9W2


Beautiful thing
And this appears to be a western relation of our group with sericea and aktis. It is neither of those. And I doubt there are many late September fliers in WA state either. It is not a Laphria sensu strictu. Will take some time to look at this one. Dr. Cannings may know it immediately. This is a male. Great shot of him.

Further study
And assuming this truly is in the sericea group means it is likely L. vultur or L. sackeni. I am not sure of the status of L. asackeni otherwise but it is closely related.

Laphria (Choerades) ventralis
I believe (a male). This sp. and L. vivax are very similar (especially in photos) but I think ventralis is more likely because: males with shorter genitalia; lateral margins of tergites are red beneath yellowish hair (hints of this in photo); sp. active later in summer - compared with vivax.

I added one more photo, a crop of the shot just before the one above. It had the abdomen in better focus, but the head out of focus.

Laphria (Choerades) ventralis
for sure. Thanks Stephen, this crop shot confirms identification.

He was sitting on a big-leaf maple leaf, and it was windy, so only a few shots were in focus. It's not completely obvious from the shots I posted, but the abdomen is strikingly striped in yellow and black.

Can see the central dorsal abdominal dark spaces from the other shot. Which is why with the late season this should be distinctive to Dr. Cannings. Did you have an estimated length to add?

I didn't get a chance to get a shot with a ruler, but that was a large maple leaf, so I'd guess 2 cm.

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