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Chrysochus cobaltinus? - Typophorus nigritus

Chrysochus cobaltinus? - Typophorus nigritus
Geneseo, Henry County, Illinois, USA
June 11, 2005
Is this a blue milkweed leaf beetle, Chrysochus cobaltinus? I have never seen one, but I have a pretty similar shot in my Simon and Schuster's Guide to Insects.

Moved from Eumolpinae.
following specialist´s final statement.

Boris, thanks for moving some of my id´s
I tried figuring it out several times, but it seems not to work here.

I´m happy to do!
By the way, it works fine. Do you have editor status - if not, that´s the explanation.

no, that´s probably it
That´s probably it. I was told by Jim you didn´t need this...probably not so...

that´s it
You don´t need editor status to move your OWN pics - but for everything else.

Typophorus nigritus
This beetle is known as the sweetpotato leaf-beetle: Typophorus nigritus

Moved from Leaf Beetles.

reminds of Typophorus; surely in the subfamily of oval leafbeetles; Eumolpinae

likely C. auratus
Assuming this picture was taken in Illinois, this is probably Chrysochus auratus. C. cobaltinus is more western in distribution - Washington, Oregon, etc. (there's a nice map of the two species in an article in the Annals of the Entomological Society of America, Vol. 94, No. 1, pp. 1-9).

I initially thought the same thing, but then recalled a specimen I collected that turned out to be something else (that I can't recall the name of:-).

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