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Photo#966113
Robber Fly - Holcocephala fusca

Robber Fly - Holcocephala fusca
Allison Park, Allegheny County, Pennsylvania, USA
July 17, 2014

Images of this individual: tag all
Robber Fly - Holcocephala fusca Robber Fly - Holcocephala fusca Robber Fly - Holcocephala fusca

Holcocephala fusca Bromley, male
Moved from Holcocephala. ID confirmed from specimen, now a photo-voucher. Thanks John.

Obviously this species and H. abdominalis are difficult to separate and require further study. As a reference point, I have a male specimen (which I consider H. abdominalis) from Indiana with a very distinct and bright yellow abdomen. Comparison of its genitalia to this specimen shows a difference in shape, consistent with other specimens I have ID'd as H. fusca.

Moved
Moved from Robber Flies.

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