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 [Cylindromyia intermedia female] Tachinidae - Cylindromyia brassicaria ?
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| Christine Devillers |
Posted on 01-09-2009 16:42
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 Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
This Cylindromyia was about 11 mm (Belgium, 31-08-2009). Long apical scutellar bristles Abdomen without discal bristles Tergite 2 ventrally without bristles Is it a female of Cylindromyia brassicaria ? Christine Devillers attached the following image:  [145.01Kb] Edited by Christine Devillers on 03-09-2009 18:38 |
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| Christine Devillers |
Posted on 01-09-2009 16:43
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Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
pic 2
Christine Devillers attached the following image:  [158.16Kb] |
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| Christine Devillers |
Posted on 01-09-2009 16:44
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Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
pic 3
Christine Devillers attached the following image:  [147.97Kb] |
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| Christine Devillers |
Posted on 01-09-2009 16:44
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Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
pic 4
Christine Devillers attached the following image:  [121.98Kb] |
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| ChrisR |
Posted on 01-09-2009 16:58
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 Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04 |
It looks like it has a postero-ventral bristle on the hind tibia so C.brassica would be ruled out ... maybe C.intermedia?
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Zeegers |
Posted on 02-09-2009 08:49
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Member Location: Soest, NL Posts: 18711 Joined: 21.07.04 |
Yes, you Chris, intermedia is not that difficult ! Intermedia often has strong darkening on the wings. Theo |
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| Christine Devillers |
Posted on 02-09-2009 12:44
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Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
Thanks, I've found this female in an old quarry (dry and warm). I had excluded intermedia because I thought that the bristles on hind tibia were not postero ventral, but postero-dorsal like in this post http://www.dipter...d_id=11004. On another post about intermedia, I've seen that basal scutellar bristles are missing. Does the following pictures help to see this feature ? Christine Devillers attached the following image:  [140.88Kb] |
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| ChrisR |
Posted on 02-09-2009 12:55
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Administrator Location: Reading, England Posts: 7699 Joined: 12.07.04 |
I have just been keying out a bunch of French Cylindromyia in Mesnil (very hard work) but if I remember correctly C.intermedia should just have strong, diverging subapicals and weak, crossed apicals (so no basals) - but this is also true of quite a few species. Mesnil splits C.intermedia from them using the presence of a small pd bristle on the mid-tibia in addition to the 2 pv bristles ... another very tricky feature to locate. The pv is very hard to make out on most photos but I think it is present on this one. On specimens I usually do it the "easy" way and just look along the length of the hind tibia and if I see bristles radiating on all 4 sides then it has a pv and if it only has them on 3 sides then it doesn't 
Edited by ChrisR on 02-09-2009 12:56 Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London. |
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| Christine Devillers |
Posted on 03-09-2009 18:39
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Member Location: Spa, Belgium Posts: 1215 Joined: 11.11.07 |
Thanks Chris and Theo, it is a new species for me  |
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