Diptera.info :: Identification queries :: Diptera (adults)
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 Fly With Bubble of Sap
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| Stephen |
Posted on 06-11-2006 00:20
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 Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
I didn't expect to find such a nice fly in November. It was a warm day and the Sugar Maple tree was oozing sap. Several different fly families were represented, feeding on the sap. When I looked at this fly, I thought, "It looks familiar. What West Virginia flies does this remind me of?" The answer: flies in Lauxaniidae, Drosophilidae, Scathophagidae, and Phoridae. As I read up on the families, I eliminated Phoridae and Scathophagidae. I am leaning toward Drosophilidae. Can someone help me here? The arista, by the way, seemed to be plumose but maybe not all the way to the tip. Photo taken today, West Virginia USA, woodlands. Length, 6.3 mm from the front of the eyes to the rear of the abdomen. Stephen attached the following image:  [91.84Kb] Edited by Stephen on 06-11-2006 03:28 --Stephen Stephen Cresswell www.americaninsects.net |
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| Stephen |
Posted on 06-11-2006 00:22
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
The face, a happy eater.
Stephen attached the following image:  [107.25Kb] --Stephen Stephen Cresswell www.americaninsects.net |
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| Stephen |
Posted on 06-11-2006 00:24
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
At last, here is the dorsal view.
Stephen attached the following image:  [99.1Kb] --Stephen Stephen Cresswell www.americaninsects.net |
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| rvanderweele |
Posted on 06-11-2006 08:58
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Member Location: Zoelmond, the Netherlands Posts: 1984 Joined: 01.11.06 |
Well, it`s for sure a heleomyzidae. At home I will give it a closer look. I have some publications about american heleomyzinae. ruud van der weele rvanderweele@gmail.com |
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| Kahis |
Posted on 06-11-2006 10:19
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 Member Location: Helsinki, Finland Posts: 1999 Joined: 02.09.04 |
Suillia, unless the New World once again makes a fool of me 
Kahis |
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| Stephen |
Posted on 06-11-2006 10:37
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Ah yes, a fifth family this fly should have reminded me of. I have photographed some similar orange Heleomyzids over the last month or so but for some reason I did not think of that family when I saw this fly. Gentlemen, thank-you for your help with this one!
--Stephen Stephen Cresswell www.americaninsects.net |
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| Andrzej |
Posted on 06-11-2006 10:56
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Member Location: Poland Posts: 2340 Joined: 05.01.06 |
Look like a male of Suillia loewi. But I should compare it with a dried one. Andrzej |
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| rvanderweele |
Posted on 06-11-2006 21:20
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Member Location: Zoelmond, the Netherlands Posts: 1984 Joined: 01.11.06 |
I find it always difficult to determine Suillia`s on a photo. Using Gill`s work from 1962 the specimen may be indeed the S. loewi, but I think it always better the have the fly under the microscope. Gill`s key mentions 10 species of Suillia. Since the work is quite old, I guess it is possible there is an updated checklist. I am interested in such an updated list. ruud van der weele rvanderweele@gmail.com |
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| Stephen |
Posted on 06-11-2006 22:50
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Andrzej, Kahis, Ruud, Thanks very much for the good work on this ID! I see that my usual reference for which species live in North America, nearctica.com, lists these Suilla species: Suillia apicalis Loew 1862 (Helomyza) Suillia barberi Darlington 1908 (Helomyza) Suillia convergens Walker 1849 (Dryomyza) Suillia longipennis Loew 1862 (Helomyza) Suillia nemorum Meigen 1830 (Helomyza) Suillia plumata Loew 1862 (Helomyza) Suillia quinquepunctata Say 1823 (Helomyza) Suillia sororcula Czerny 1926 (Suillia) This website is the web version of the print publication Nomina Insecta Nearctica. --Stephen Stephen Cresswell www.americaninsects.net |
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| Andrzej |
Posted on 07-11-2006 13:17
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Member Location: Poland Posts: 2340 Joined: 05.01.06 |
Hi Stephen !, Thanks a lot for your comments ! The number of Suillia species in the Nomina Nearctica is OK !. few taxonomic works have been published after Gill (1962) and some species name were synonymized. Andrzej , |
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| rvanderweele |
Posted on 07-11-2006 13:24
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Member Location: Zoelmond, the Netherlands Posts: 1984 Joined: 01.11.06 |
Well, is the number of Suillia species really so small in North America or may we expect the discovery of many more new species there?
ruud van der weele rvanderweele@gmail.com |
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| rvanderweele |
Posted on 07-11-2006 14:15
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Member Location: Zoelmond, the Netherlands Posts: 1984 Joined: 01.11.06 |
Indeed, Andrzej, I see that S. loewi Garret, 1925 is not mentioned in the list. Do you have a correct, updatet list? As well I noticed that the S. convergens Walker is not mentioned in Gill`s key. cheers, ruud van der weele rvanderweele@gmail.com |
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| Andrzej |
Posted on 07-11-2006 14:32
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Member Location: Poland Posts: 2340 Joined: 05.01.06 |
Hi Ruud, Sorry it is my fault ! S convergens= S. loewi (Gills Catalogue of Nearctic Diptera). Cheers,  Andrzej |
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| Stephen |
Posted on 07-11-2006 20:10
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Thank-you gentlemen for all your help with this nice fly. Can you clarify, since I am pretty new to all these nomenclature issues in Diptera: S. loewi is the correct name is S. convergens is a synonym?
--Stephen Stephen Cresswell www.americaninsects.net |
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| rvanderweele |
Posted on 07-11-2006 20:59
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Member Location: Zoelmond, the Netherlands Posts: 1984 Joined: 01.11.06 |
Yes, I think it is. cheers ruud van der weele rvanderweele@gmail.com |
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| Andrzej |
Posted on 07-11-2006 21:01
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Member Location: Poland Posts: 2340 Joined: 05.01.06 |
S. convergens is an older name and has a priority. Andrzej |
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| rvanderweele |
Posted on 07-11-2006 21:04
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Member Location: Zoelmond, the Netherlands Posts: 1984 Joined: 01.11.06 |
Hello, Mr. Beuk, is it possible to take messages back  I am so sorry, Mr. Andrzej, for not looking for the person, who described. Of course, you are right! Ruud ruud van der weele rvanderweele@gmail.com |
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| Stephen |
Posted on 19-11-2006 23:59
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
One more question, is it safe to say this is a male? I have read that the abdomen of the female in this family tapers toward the rear, while the abdomen of the male is more rounded at the end, slightly clubbed.
--Stephen Stephen Cresswell www.americaninsects.net |
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| Tony Irwin |
Posted on 20-11-2006 00:12
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 Member Location: Norwich, England Posts: 7193 Joined: 19.11.04 |
No doubt - it's a male.
Tony ---------- Tony Irwin |
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| Stephen |
Posted on 20-11-2006 11:19
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Member Location: West Virginia USA Posts: 1322 Joined: 12.04.05 |
Thanks, Tony!
--Stephen Stephen Cresswell www.americaninsects.net |
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