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Mystery Cheilosia 1

 
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Sandy



Joined: 22 Jul 2008
Posts: 135
Location: East Lothian

PostPosted: Mon Apr 19, 2010 8:48 am    Post subject: Mystery Cheilosia 1 Reply with quote

I've been using the Stubbs & Falk key to try and id (at least to the group level) 3 Cheilosias I photographed recently. For me it's been useful to study the photos and take as detailed notes as possible for comparison with the key and to become familiar with the structure of the subjects.
Much important detail was missed though because of jumpy subjects and clumsy photographer Smile

Cheilosia 1: Because of ithe pale colouring and the completely yellow hind tibia I placed it in the Grossa group.
Hard to tell but the 3rd antennal segment appears to be pale rather than dark so I discounted grossa, leaving chrysocoma & albipila as next most likely candidates.
Body hairs appear "foxy" and similar thorax colour would suggest chrysocoma. But I can't be certain I haven't missed something.

Any comments welcome especially those pointing out the flaws, it's all good learnings Smile


Sandy
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conopid



Joined: 03 Sep 2005
Posts: 342
Location: Shrewsbury, Shropshire

PostPosted: Tue Apr 20, 2010 11:14 am    Post subject: Reply with quote

It's a female C grossa. The hind and middle femora are orangey in female albipila.
C chrysocoma is very orange haired - much mores os than grossa and albipila. It's also not usually flying until May.

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Nigel Jones
Shrewsbury
Shropshire
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Sandy



Joined: 22 Jul 2008
Posts: 135
Location: East Lothian

PostPosted: Tue Apr 20, 2010 5:51 pm    Post subject: Reply with quote

Thanks Nigel

I did google chrysocoma and it's REALLY REALLY foxy! Much more so than this fly. Apparently quite uncommon too which is a shame because it looks stunning!

Good pointer regarding the femorae of albipila. Hopefully I'll find some of those in may.

Cheers,
Sandy
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