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Photo#137814
Syrphid: Ocyptamus fascipennis? - Ocyptamus lemur

Syrphid: Ocyptamus fascipennis? - Ocyptamus lemur
On Hwy 49, ~ 3 mi west of Sattley, Sierra County, California, USA
July 11, 2007
I'm wondering if my ID is correct here? I used BugGuide resources and links to get it, including this key to Syrphidae of the Southeastern US. (Of course, California isn't in the Southeastern US, but... :-)

Also, would it be correct to assume this is a female, since the eyes are well-separated at the top? (Or does that only apply to certain taxa in Diptera?)

The specimen was on a milkweed leaf (Asclepias speciosa). Along roadside in montane coniferous forest, ~5400 ft elevation a few miles east of Yuba Pass in the Northern Sierra Nevada.

Moved
I'm fairly sure these western specimens with a thin band on the wing are O. lemur, not O. fascipennis.

Moved from Ocyptamus fascipennis.

 
Thank You, Joel!
You fulfilled my hope that someone would correct me if I was wrong! :-)

I found an old description of Baccha lemur (= Ocyptamus lemur) on the Biodiversity Heritage Library web site, and also 5 images of a (slightly withered) lectotype on the MCZ web site. I put links to these two items on the info page.

I also posted another image of what I'm now guessing is O. lemur.

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