Black flying, ground burrowing insect

San Jose, CA

Can someone help me identify this - there are 10 or so flying around my brick patio at any given time. They seem to feed off of the walnut tree droppings, and don't seem harmful. They're pretty small, about the size of a housefly in length (maybe a little longer?)

Here are some larger pictures - http://www.eratosthenes.org/bug/bugpage.html


Thanks,
John

This message was edited Aug 8, 2010 2:21 PM

Thumbnail by jchernia

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