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#100112
Carpet Beetle - Megatoma variegata - male

Carpet Beetle - Megatoma variegata - Male
Thompson Falls, Sanders County, Montana, USA
March 28, 2007
Size: 6 mm
Montana State Record.

I was surprised to see this one that is 6 mm compared to the last 4 mm one I photographed. Perhaps this is a male, or I guess the size can vary that much?

It is a male - see longer end segment of antennae.

100% ID
Both female and male have been pinned by Dr. Beal and I've mailed them off to the entomology dept. at MSU in Bozeman, MT for their collection.

 
Good work, Lynette.
I so enjoy seeing bugguide play a role in solving entomological puzzels and mysteries.

It is male!
Dear Lynette,

just compare the last antennal segments of this, and your other specimen :-)

Did you collect it?
Richard Beal says he could be 100% certain if he examined a male. (Of course I don't know if this *is* a male :-)

 
Not this time
but I have a feeling I'll see it again. They seem to eat wood on the side of the house and I've seen three already this spring. Do you think size could make it a male?

 
Normally female beetles are bigger,
but with this species I couldn't say. I thought the antennal clubs looked slightly larger but perhaps a male's antennae are substantially bigger. That's the usual diagnostic trait in sexing dermestids I think.

Okay, I re-compared and I would say the terminal antennomere *is* substantially longer, so this one must be a male.

Okay, I've such noticed Boris' comment above. It appears I'm late with this assessment but at least I'm not wrong :-)

 
Ok,
thanks guys, I'll keep my eye out for him.

I found him. I collected him and one of his friends tonight. Same place as always....eating the wooden trim on the house. I'll email Dr. Beal and see if he wants to look at the male.

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