Diptera.info :: Identification queries :: Diptera (adults)
 Dolichopodidae 2008-VIII-1 (= ? Hercostomus)
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| John Carr |
Posted on 24-12-2010 21:20
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 Super Administrator Location: Colorado, USA Posts: 10655 Joined: 22.10.10 |
Massachusetts, USA, on a slime covered seep. About 4 mm long.
Edited by John Carr on 05-12-2011 02:40 |
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| John Carr |
Posted on 24-12-2010 21:22
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Super Administrator Location: Colorado, USA Posts: 10655 Joined: 22.10.10 |
And now with a picture the site will accept as an upload...
John Carr attached the following image:  [153.08Kb] |
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| John Carr |
Posted on 24-12-2010 21:23
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Super Administrator Location: Colorado, USA Posts: 10655 Joined: 22.10.10 |
Head
John Carr attached the following image:  [65.64Kb] |
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| John Carr |
Posted on 24-12-2010 21:24
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Super Administrator Location: Colorado, USA Posts: 10655 Joined: 22.10.10 |
Wings. C is short on right wing, normal length on left.
John Carr attached the following image:  [56.98Kb] |
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| Igor Grichanov |
Posted on 25-12-2010 22:57
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 Member Location: St.Petersburg, Russia Posts: 1818 Joined: 17.08.06 |
Keep it temporarly as Hercostomus sp.
Igor Grichanov |
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| John Carr |
Posted on 05-12-2011 02:39
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Super Administrator Location: Colorado, USA Posts: 10655 Joined: 22.10.10 |
If this is Hercostomus it should be H. chetifer (Walker). In the regional key by Robinson (1964) that is the only species with the combination of pale femora, abdomen without yellow, and fourth vein sinous beyond crossvein. I only have this photo of a female and can not check the male fore tarsus where the secondary sexual character is found.
Edited by John Carr on 05-12-2011 03:02 |
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| John Carr |
Posted on 05-12-2011 02:47
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Super Administrator Location: Colorado, USA Posts: 10655 Joined: 22.10.10 |
Let me add the wing does not agree closely with the illustration in the description of the synonym Paraclius ornatus Van Duzee 1921 (http://psyche.ent...28-120.pdf). That species has M bent more gradually forward and R4+5 more backwards so they end closer together. His description notes "This female is easily recognized by its venation, together with the silvery front and yellow proboscis and ovipositor." |
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