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Bee? - Holcocephala fusca

Bee? - Holcocephala fusca
Somerset County, New Jersey, USA
August 16, 2010
Size: about 1/4 to 1/2"
What is this insect I commonly find at home?

Moved from Robber Flies.

is an alate ant

Thanks Brad, for the prey ID!
Thanks Brad, for the prey ID!
And yes, this is a Holcocephala, looks like H. fusca to me (not super yellow, hind tibia not as clubbed).

Moved for expert attention & cropped
Moved from ID Request.

this is a so-called 'robber fly' (feasting on an alate ant), maybe a Holcocephala --compare:

the club-like thing sticking out from under the wing (and called a haltere) is the remnant of the hind wing; only flies (members of the order Diptera) have it; there are no predatory bees, btw.

Thank you some much for the reply, and the extra detail!

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