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Photo#31426
Unknown blue-black bug - Meloe impressus - female

Unknown blue-black bug - Meloe impressus - Female
Carlisle, Middlesex County, Massachusetts, USA
September 12, 2005
Size: 1.25 inch
A voracious eater of Jack-in-the-pulpits. It strips the leaves completely bare leaving only the veins. It exudes a yellowish juice when handled. This one was over an inch long and was the largest. Others were about 0.75 inch.

Meloe impressus Kirby
John Pinto det.

Moved from Oil Beetles.

Blister Beetle
maybe in the genus Meloe. Do you have any blisters on your hands now?

 
Hi Robin, thanks very much. I
Hi Robin, thanks very much. I looked up some Meloe pics and this is very much like some of them. Thanks for warning about the blisters. I didn't think of that. When it first exuded some 'juice', I deliberately dipped my finger in it to smell it. It had no discernible smell. I washed my hands about 15 mins later - hopefully that will be good enough. Thanks again, Rgds, Kay

 
I agree.
I agree with Robin. This is a female Meloe. I know because the males have "knots" or "kinks" in the antennae that they use in mating. Generally, your fingers have skin thick enough not to be affected by the blistering agent (cantharadin), but more sensitive areas can be scarred by the chemical. Meloe has an extraordinary life history involving parasitism of solitary bees. They are flightless as adults, so rarely found very far from nesting sites of their hosts.

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