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Photo#36734
Cerceris

Cerceris
Baxter State park, Maine, USA
July 27, 2005
Size: 15 mm
I believe this is a Cerceris sp (which I hesitate to call a Weevil Wasp, because, in Europe at least, some species feed their larvae on bees). Any idea which species this might be ? I could not really match it with any picture in the guide.

Cerceris sp.
Yes, it is a Cerceris. The bee-killers you refer to are in the genus Philanthus as far as I know, and are called "bee wolves." Our Cerceris are known to prey on weevils, buprestids, and leaf beetles, varying by the particular species of wasp.

 
Cerceris
Thanks for your reply. In fact I meant "true Cerceris". The most common species in N-W Europe, Cerceris rybyensis, preys on halictids and other small bees. Some others, like C. arenaria, prey on weevils. Of course Philanthus sp. also capture bees. P. triangulum goes exclusively for Honey Bees.

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