What's That Bug? does not endorse extermination

Large black beetle?
Location: East-Central New Jersey
November 17, 2010 9:47 am
Found this while gardening. It’s about an inch and 1/2 long. My hand is included for scale. Looks like a cross between a large ant and a wasp. Couldn’t find it in my Mid-Atlantic field guide — what is it?
Signature: Jennifer

Oil Beetle

Hi Jennifer,
The large, black, flightless Blister Beetles in the genus
Meloe are known as Oil Beetles because they are able to secrete a substance known as hemolymph.  The hemolymph is somewhat oily and it contains a compound known as cantharidin which can cause blistering of skin.  You should avoid handling Oil Beetle as well as other Blister Beetles in the family Meloidae.

What's That Bug? does not endorse extermination
Location: New Jersey

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