Diptera.info :: Identification queries :: Diptera (adults)
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 Tiny Swollen Fly
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| Stephen |
Posted on 12-11-2006 15:59
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 Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
I am posting two photos of two different individual flies, but I think they are the same species. One is very swollen?a gravid female at this time of the year? Or just a fly that has been drinking too much sap? Ephydridae? I measured 3.2 mm to the rear of the abodmen in the one photo where you can see the abdomen. In the other photo I measured 3.6 mm to the rear of the wings. West Virginia USA, November 2006, at Sugar Maple sap, woodlands. Stephen attached the following image:  [75.45Kb] --Stephen Stephen Cresswell www.americaninsects.net |
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| Stephen |
Posted on 12-11-2006 16:00
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Swollen, with Eggs or Sap?
Stephen attached the following image:  [109.13Kb] --Stephen Stephen Cresswell www.americaninsects.net |
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| Nikita Vikhrev |
Posted on 12-11-2006 16:42
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 Member Location: Moscow, Russia Posts: 9475 Joined: 24.05.05 |
http://www.diptera.info/photogallery.php?photo_id=338
Nikita Vikhrev - Zool Museum of Moscow University |
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| Stephen |
Posted on 12-11-2006 17:04
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Thank-you Nikita! It is been a little while since I photographed a new family (new to me that is). I see Black also photographed his flies at sap. Very nice, thank-you for the ID help!
--Stephen Stephen Cresswell www.americaninsects.net |
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| Paul Beuk |
Posted on 12-11-2006 20:32
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
So, to save everyone from going to the Gallery: that is Aulacigaster leucopeza. 
Paul - - - - Paul Beuk on https://diptera.info |
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| crex |
Posted on 12-11-2006 20:48
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 Member Location: Sweden Posts: 1996 Joined: 22.05.06 |
Anyone know how come the abdomen is so swollen this late time of the year? Eggs? |
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| Stephen |
Posted on 12-11-2006 22:11
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Quoting Professor Donald Chandler who is summarizing the recent literature: "There was only one species (the Holarctic A. leucopeza) known from North America until the revision by Wayne Mathis and Amnon Friedberg in 1994. A. leucopeza was restricted to the Palearctic region, and what had been called "leucopeza" in North America became three new species. The species do look a lot alike, and if you are unaware of this paper, and familiar with earlier records of leucopeza from North America, leucopeza would be a logical identification. However, it is no longer the correct name, and I don't know which of the two Northeastern species your photo shows." Don was commenting on someone else's photo on BugGuide. Nomina Nearctica has this listing for the genus in North America: Aulacigaster mcalpinei Mathis and Freidberg 1994 (Aulacigaster) Aulacigaster neoleucopeza Mathis and Freidberg 1994 (Aulacigaster) Aulacigaster sabroskyi Mathis and Freidberg 1994 (Aulacigaster) Edited by Stephen on 12-11-2006 23:28 --Stephen Stephen Cresswell www.americaninsects.net |
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