Diptera.info :: Identification queries :: Diptera (adults)
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 Muscidae, Mesembrina?
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| wilde |
Posted on 15-04-2007 16:27
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Member Location: Koudekerke, Netherlands Posts: 176 Joined: 13.09.06 |
This fly was sitting on a broomstick near my kitchen. It has brownish colours on the wings and a kind of postscutellem. Could it be a Mesembrina species? Which one? wilde attached the following image:  [76.46Kb] Edited by wilde on 15-04-2007 16:39 Albert de Wilde |
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| Nikita Vikhrev |
Posted on 15-04-2007 16:40
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 Member Location: Moscow, Russia Posts: 9354 Joined: 24.05.05 |
No Albert, it is male of Pollenia, Calliphoridae. Nikita Nikita Vikhrev - Zool Museum of Moscow University |
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| wilde |
Posted on 15-04-2007 18:31
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Member Location: Koudekerke, Netherlands Posts: 176 Joined: 13.09.06 |
Nikita, I'm not quite convinced. My Diptera guide sais that Calliphoridae don't have a postscutellum. It is obvious that my fly has a postscutellem. A Pollenia species should have orange hairs on the thorax. I don't see any of them. What makes you think it is a male Pollenia sp.? Albert de Wilde |
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| Nikita Vikhrev |
Posted on 15-04-2007 21:14
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Member Location: Moscow, Russia Posts: 9354 Joined: 24.05.05 |
Albert, 1. Postscutellum is hardly visible on photo. 2. Pollenia may be with a lot of golden hairs like: http://www.diptera.info/forum/viewthread.php?forum_id=5&thread_id=5606&pid=25101#post_25101 or bold like: http://www.diptera.info/forum/viewthread.php?forum_id=5&thread_id=5519&pid=24782#post_24782 3. It is not Mesembrina because it looks not like this (see Gallery) It is not Musca, than it is not Muscidae, because of vein M1+2. 4. It is not Tachinidae because of plumose arista and non-Tachinidae antennae. 5. The easiest way, I think, is to remember ?jizz? of Pollenia, you can find a lot by search on keyword ?pollenia? on Diptera.info. To tell you truth in case of your photo (a very good one, by the way) the most characteristic for my was unmistakable bluish color of abdomen dusting. Nikita P.S. All the ?bold? early spring Pollenia with such a bluish abdomen dusting I collected was ID by experts as Pollenia rudis? Nikita Vikhrev - Zool Museum of Moscow University |
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| Kahis |
Posted on 15-04-2007 21:21
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 Member Location: Helsinki, Finland Posts: 1999 Joined: 02.09.04 |
I have to side with Nikita. The place where the postscutellum would be if this fly had one (below the scutellum) is not visible. Only a part of the metanotum (area between scutellum and base of abdomen) is visible. Although unusually bluish, it's probably a Pollenia. You are quite correct, it does not have yellow hairs, but the sides of thorax have short pale hairs - close enough. The amount of these pale hairs is very variable and spring specimens, having spent the winter in confined spaces, have often lost nearly all of then, Kahis |
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| Kahis |
Posted on 15-04-2007 21:23
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Member Location: Helsinki, Finland Posts: 1999 Joined: 02.09.04 |
Excellent photograph btw. Please submit it to the Gallery as an example of a dark Pollenia.
Kahis |
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| wilde |
Posted on 15-04-2007 23:29
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Member Location: Koudekerke, Netherlands Posts: 176 Joined: 13.09.06 |
OK thanks all of you for more explaination. The yellow-brown shields at each side of the scutellum looked to me as a postscutellum. What are these shields if they are not a postscutellum? How to submit a photo to the gallery? I did't succeed. Edited by wilde on 16-04-2007 10:02 Albert de Wilde |
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| Nikita Vikhrev |
Posted on 16-04-2007 09:56
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Member Location: Moscow, Russia Posts: 9354 Joined: 24.05.05 |
Click "Submit photo for Gallery" = http://www.diptera.info/submit.php?stype=p Nikita Vikhrev - Zool Museum of Moscow University |
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| wilde |
Posted on 16-04-2007 10:00
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Member Location: Koudekerke, Netherlands Posts: 176 Joined: 13.09.06 |
I tried to submit the photo to the gallery, but get an error: Your photo could not be submitted. The photo: 736x552 pixels; 135168 kb. What is going wrong? Edited by wilde on 16-04-2007 10:10 Albert de Wilde |
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| Paul Beuk |
Posted on 16-04-2007 10:28
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 Super Administrator Location: Netherlands Posts: 19375 Joined: 11.05.04 |
Well, I am fed up with all the errors that occur after the image verification script was updated. i will set the old one back.
Paul - - - - Paul Beuk on https://diptera.info |
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| Nikita Vikhrev |
Posted on 16-04-2007 13:04
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Member Location: Moscow, Russia Posts: 9354 Joined: 24.05.05 |
I can't submit image too, neither yesterday, nor today...
Nikita Vikhrev - Zool Museum of Moscow University |
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| Tony Irwin |
Posted on 16-04-2007 21:15
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 Member Location: Norwich, England Posts: 7236 Joined: 19.11.04 |
Hi Albert The yellow-brown shields are the paired calyptera - usually clear, white or yellow thoracic processes that cover the halteres in "calypterate" flies. The postscutellum is a single, cushion-like "mini-scutellum" that is found directly under the scutellum and is most obvious in tachinids. Tony ---------- Tony Irwin |
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