Diptera.info :: Identification queries :: Diptera (adults)
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 Neomyia viridescens
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| Stephen R |
Posted on 15-09-2009 10:33
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 Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
Am I close? Last week, NW England. Oh, too hasty I think - just noticed only 3 PDC
Stephen R attached the following image:  [137.52Kb] Edited by Stephen R on 20-09-2009 14:43 |
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| andrzej grzywacz |
Posted on 15-09-2009 13:58
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 Member Location: Poland Posts: 103 Joined: 09.02.08 |
Hmmm... acording to Gregor key, sometimes N. viridescens has only 3 postsutural dc on one or both sides. So I think it is corect. Nice, rare Neomyia  Did anybody catch before specimen like this? I see this kind of viridescens for the first time. |
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| Stephen R |
Posted on 15-09-2009 17:13
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Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
Thanks for that, Andrzej I have some more photos at home which I think are of similar flies, so I'll count their bristles when I get back on Saturday! Stephen. |
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| Nikita Vikhrev |
Posted on 15-09-2009 20:18
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 Member Location: Moscow, Russia Posts: 9459 Joined: 24.05.05 |
At my observations N.viridescens is rather common in late autumn (September is late autumn in Moscow region) either on flowers and on cow dung.
Nikita Vikhrev - Zool Museum of Moscow University |
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| Stephen R |
Posted on 15-09-2009 21:09
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Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
Since I am not a real dipterist I have been dividing my time rather unequally between flowers and cowdung , but I have seen these fairly often on flowers in the last two weeks. I think Andrzej just meant that it was rare to see them with 3 post dc.Stephen. |
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| andrzej grzywacz |
Posted on 15-09-2009 22:10
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Member Location: Poland Posts: 103 Joined: 09.02.08 |
Yes Stephen, acording to Gregor key i was thinking about N. viridescens with 3 post dc, "normal" viridescens I have observed many times |
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| javanerkelens |
Posted on 15-09-2009 22:21
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 Member Location: Netherlands Posts: 2962 Joined: 18.10.07 |
3 postsutural dorsocentrals is possible...but rare (F.Gregor,R.Rozkosny,M.Bartak & J.Vanhara) Joke van Erkelens |
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| Stephen R |
Posted on 20-09-2009 14:40
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Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
I came home and looked at my later photos. I had a female (with normal 4 post dcs) and this male, which I am fairly sure is the same individual as the first image, but five days later. I thought it might be interesting to show the colour changes in a known timespan. I think it must have been quite fresh in the first image. Went out to look for it again today, but nothing but Lucilia turned up so far. EDIT: Not the same - see below! Stephen R attached the following image:  [88.32Kb] Edited by Stephen R on 07-10-2009 13:48 |
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| Stephen R |
Posted on 06-10-2009 11:27
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Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
Here it is again on day 29. (First photo was Sept 7, this one Oct 5.) I found another photo from Sept 9 which shows that much of the change from blue to green happens in the first few days. The green - bronze transition seems to be much slower. The wings are still as new; but like me it hasn't travelled very far 
Stephen R attached the following image:  [90.74Kb] |
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| Stephane Lebrun |
Posted on 06-10-2009 20:37
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 Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
The two last pictures clearly show Neomyia cornicina (presutural acr presnt and 3 post sutural dc).
Stephane. |
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| Stephen R |
Posted on 07-10-2009 13:46
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Member Location: Clitheroe Lancashire UK Posts: 2396 Joined: 12.06.09 |
Ah, many thanks for putting me right Stephane! And now I see the difference in the scutellar bristles too. Must be more careful about jumping to conclusions! |
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