Diptera.info :: Identification queries :: Diptera (adults)
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 Mesembrina
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| Nikita Vikhrev |
Posted on 16-08-2006 20:14
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 Member Location: Moscow, Russia Posts: 9228 Joined: 24.05.05 |
Moscow region, 16 aug, 10-11, motionless on tree bark. Arista plumose as Calliphoridae. Crazy idea came to my mind, could it be Oestromyia leparina? Nikita Vikhrev attached the following image:  [112.31Kb] Edited by Nikita Vikhrev on 20-08-2006 09:08 Nikita Vikhrev - Zool Museum of Moscow University |
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| Robert Heemskerk |
Posted on 16-08-2006 20:51
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 Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
Hello Nikita, Is it not Mesembrina meridiana? greeting, robert |
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| Nikita Vikhrev |
Posted on 16-08-2006 21:14
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Member Location: Moscow, Russia Posts: 9228 Joined: 24.05.05 |
It seems to me that you are right. Thank you Robert. Nikita Vikhrev - Zool Museum of Moscow University |
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| Nikita Vikhrev |
Posted on 20-08-2006 09:21
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Member Location: Moscow, Russia Posts: 9228 Joined: 24.05.05 |
Next day I've found it under that tree on fresh cow dang in company with another Mesembrina mystacea. Both collected and I have trouble with species level ID. My key divide M. intermedia and M. meridiana by foretarsus colour. Both flies have dorsaly foretarsomers all black. Ventraly second fly (female) has only fore tar1 red, as it has to be for M. meridiana, but first fly (male) has ventraly all 1-5 fore tarsomer red, as M. intermedia. Also size of first fly is obviosly less. Nikita Vikhrev attached the following image:  [78.24Kb] Nikita Vikhrev - Zool Museum of Moscow University |
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| Nikita Vikhrev |
Posted on 20-08-2006 21:51
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Member Location: Moscow, Russia Posts: 9228 Joined: 24.05.05 |
"If I understand what Nikita is saying in then this fly is M intermedia I think?" Thank you Susan, I forgot to search in our Gallery. But photo by Gerard in Gallery is M. meridiana, as discribes my key - p1 cell apicali narrow, fore tar 5-3 red, the rest of legs - black. My trouble was that fore tar 5-1 of my male is red, but only on ventral side. Nikita Nikita Vikhrev - Zool Museum of Moscow University |
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| Tony Irwin |
Posted on 20-08-2006 23:09
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 Member Location: Norwich, England Posts: 7193 Joined: 19.11.04 |
Hi Nikita Looking at Zimin's key (Keys to the Insects of the European Part of the USSR, 1969), I think that the fore tarsus of intermedia should have segments 2 to 5 reddish yellow all over, not just on the ventral side. Also if you compare figs. 3 and 4, there is a difference in the curve of M1+2. In intermedia it seems that the vein is curved closer to the wing tip. In meridiana the curve is more basal. It would be good to see a photo of intermedia to check whether this is a good character. Perhaps Kahis has a specimen and could take a photo of the wing for us? As far as size differences are concerened, remember that muscid males are almost always smaller than females. Edited by Tony Irwin on 20-08-2006 23:13 Tony ---------- Tony Irwin |
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| Nikita Vikhrev |
Posted on 20-08-2006 23:20
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Member Location: Moscow, Russia Posts: 9228 Joined: 24.05.05 |
... or in the end of august Andrey Ozerov will appear back in Moscow Zooligy Musem and I'll compare my fly with Mesembrinas collected by Zimin personaly... Thank you Tony, Nikita. Nikita Vikhrev - Zool Museum of Moscow University |
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but don't see the image in the post.
