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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Longhorn and Leaf Beetles (Chrysomeloidea) » Leaf Beetles (Chrysomelidae) » Eumolpinae » Eumolpini » Chrysochus » Blue Milkweed Beetle (Chrysochus cobaltinus)
Photo#69355
Blue Milkweed Beetle - Chrysochus cobaltinus
Copyright © 2006 Ron Hemberger

Blue Milkweed Beetle - Chrysochus cobaltinus
Riley Wilderness Park, Coto De Caza, Orange County, California, USA
August 7, 2006
Size: ~7mm
Not in the least skittish. I was there for perhaps ten minutes, shooting this and other insects. Beetle scarcely moved, and at that mainly to adjust position.

Images of this individual: tag all
Blue Milkweed Beetle - Chrysochus cobaltinus Dark metallic beetle - Chrysochus cobaltinus
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Contributed by Ron Hemberger on 7 August, 2006 - 10:58pm
Last updated 9 August, 2006 - 9:56pm

Beetle
I think this might be Chrysochus cobaltinus the blue milkweed beetle a member of the Chrysomelidae. It's widely distributed in western N.A., but don't hold me to it! Hope this helps.
… Josh Lemons, 8 August, 2006 - 12:57pm login or register to post comments

 
think so too
I agree on your identification as Chrysochus cobaltinus
… Rob Westerduijn, 8 August, 2006 - 2:22pm login or register to post comments

 
Thanks to both
About the other insects I mentioned originally:

Approximately a foot above this individual on the same plant was a large milkweed bug. Four inches to the right were a mating pair of milkweed bugs. But for the life of me, I don't think the plant was milkweed.

When I was a kid in Ohio, I knew milkweed as strictly a broadleaf, easily identified plant. Here in California, there's an "Indian Milkweed" much like that, but more commonly milkweed here is thin leaved.
… Ron Hemberger, 8 August, 2006 - 8:12pm login or register to post comments

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