Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
zigzag bee fly - Hemipenthes webberi

zigzag bee fly - Hemipenthes webberi
London, Middlesex, Ontario, Canada
May 27, 2004
Size: 7-8 mm
In a clearing in deciduous woods. The black wing area has a squarish zigzag border with no rounded blob near the apex, similar to these images of Hemipenthes morio: 1, 2, 3, 4. But in those images, the black extends across the wing, covering the anal angle, whereas that area is clear in my photo.

Moved from Hemipenthes.

H. webberi
This is H. webberi. As you suggest, it can be distinguished from H. morio (in the northeast) by the reduced black in the anal cell.

Compare AZ fly?
Do you think my fly from Arizona could also be a Hemipenthes?

I'm in search of a plausible genus.

Patrick Coin
Durham, North Carolina

Yes, I would say so
In fact, your image looks more like Hemipenthes morio than mine does; the four H. morio images I linked to are consistent in showing extensive black along the inner edge of the wing, with part of the black area bordering/touching the abdomen (as in your photo) whereas in my image, the black stops before it reaches the abdomen. All photos show the same zigzag pattern across the wing, clear wingtips, and more-or-less uniformly dark body.