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Photo#901503
Diptera, unidentified - Cheilosia grossa

Diptera, unidentified - Cheilosia grossa
Springfield, Lane County, Oregon, USA
March 22, 2013
Size: Approx. 1.5 cm
Nectaring on Baby Blue Eyes (Nemophila menziesii var. atomaria) in exotic-dominated prairie opening. Elevation about 1230 ft.

Images of this individual: tag all
Diptera, unidentified - Cheilosia grossa Diptera, unidentified - Cheilosia grossa

Moved
Moved from Cheilosiina.

Moved
Moved from Syrphid Flies.

This feels like something in
This feels like something in the Milesiini to me - maybe Criorhina or Hadromyia?

 
This is an odd little sucker.
This is an odd little sucker. It is neither of those genera. Let me do some research.

 
What about Pyritis? Very rare
What about Pyritis? Very rare genus... big and looks like Cheilosia... I can not see the face enough in these pics, so I am not completely sure

 
Cheilosia
This is Cheilosia. It is one of three species based on the NMNH collection. However there could be other similar species in this range which I don't know about.

Cheilosia lasiophthalmus
Cheilosia chalybescens
Cheilosia ferruginia

 
Maybe. It doesn't have the cl
Maybe. It doesn't have the clouded portions of the wing we see in Pyritis or the plumose arista.

 
You are right, it is not Pyri
You are right, it is not Pyritis, it is actually the introduced Cheilosia grossa (Which is called C. corydon by FCT, but this is not the valid name)... It is an early spring species introduced to NW states! Perfect fit...

 
What about these species?
What about the species. All look roughly like this.

Cheilosia lasiophthalmus - Great match.
Cheilosia chalybescens - Eliminated. Has a black setose t4 & 5.
Cheilosia ferruginia - Great match.

 
I am very confident that this
I am very confident that this is the European species, but I have to admit that I have never seen ferruginea and on top of it, Cheilosia is a mess and I do not know anybody who has even a little bit of insight into the Nearctic fauna. There are several good specialists who work on the Palaearctic fauna.... So this is just a "guess". Many of the Cheilosia pics on BG look very distinct, but unfortunately they can not be identified so far...

 
Looks like pictures of C. grossa.
I cannot tell them apart from pictures of C. grossa. Yes. Cheilosia is an utter mess. Most likely a good chunk of described species are synonyms but there are likely plenty of undescribed species too.

When they revised the European species they synonymized some ridiculous number like 50 species. There had gotten to be so many species that it wasn't possible to check all the types so authors were redescribing species by country almost. You would have one in France and one in Poland for instance.

 
I think you are very correct
I think you are very correct with your assessment of the genus Cheilosia

Moved for expert attention.
Moved from ID Request.

pls correct location data
reads "...Lane County / OR County, Oregon..."
please refer to the filling instructions provided in the submission form

 
Error
Fixed, thank you!

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