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 Tachinidae ?
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| Gordon Jar |
Posted on 23-05-2006 13:55
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Member Location: Posts: 209 Joined: 09.10.05 |
This was photographed in my garden in south east England today. I have tentively identified it as Tachinidae. Is there sufficient detail to identify the species. Thankyou Gordon |
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| ChrisR |
Posted on 23-05-2006 15:43
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 Administrator Location: Posts: 7699 Joined: 12.07.04 |
Looks very tachinid-like - did you get a specimen? I only ask because it looks a bit like a Carcelia sp. and it would be very interesting to check if it is the new species, bombylans. |
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| Zeegers |
Posted on 23-05-2006 16:41
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Member Location: Posts: 18446 Joined: 21.07.04 |
Definitely a Carcelia. It is impossible to give a positive ID from the picture. My guess, repeat guess, would be C. puberula, next of kin to bombylans Theo Zeegers |
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| Gordon Jar |
Posted on 23-05-2006 18:43
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Member Location: Posts: 209 Joined: 09.10.05 |
Many thanks Chris and Zeeger. No I didn't get a specimen. I don't have the necessary to examine and keep them. (Or the knowledge) Is it a case of needing to examine the specimen ? or have I not included a photograph of the particular part needed to determine the species. I do have a couple more photographs of it. Gordon |
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| Zeegers |
Posted on 23-05-2006 20:40
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Member Location: Posts: 18446 Joined: 21.07.04 |
Carcelia's are nearly as difficult to ID as Siphona, so for a positive ID we need the specimen. To illustrate this, I went wrong. I just noticed the basicosta being black. So it is not, never, C. bombylans nor puberula. I have an idea, but I am not going to publish it any more. Sorry, just too long shot. Theo |
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| ChrisR |
Posted on 23-05-2006 23:07
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Administrator Location: Posts: 7699 Joined: 12.07.04 |
Well-spotted Theo, I was lazy and just going on the "look and feel" of the fly with it's slightly yellow-brown dusting on the abdomen, which is common in bombylans and currently we seem to get more bombylans reported than any other Carcelia species. With a dark basicosta it has to be one of: tibialis, lucorum, gnava or atricosta but the latter 2 are incredibly rare here. Working on Belshaw's key (which we are currently updating with a few more species - work in progress) I think I can see discal bristles on tergite 4 and 1 antero-dorsal bristle on the mid tibia, which would suggest it is tibialis. It's still a bit hit & miss without the specimen to examine closely, but it's as close as you'll probably get I think  With a specimen it would be more straightforward and if it was a male we'd be able to use the very good features of the male genitalia. I'd say Carcelia are not really as bad as Siphona to identify, and there are worse genera (like Thelaira, which is currently under revision) ... but they're certainly not easy from a photo 
Edited by ChrisR on 23-05-2006 23:14 |
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| Gordon Jar |
Posted on 24-05-2006 17:52
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Member Location: Posts: 209 Joined: 09.10.05 |
Thankyou very much Gordon |
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but don't see the image in the post.