Diptera.info :: Identification queries :: Diptera (adults)
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 Another Hydrellia
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| Robert Heemskerk |
Posted on 17-05-2007 00:07
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 Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
Hello flyforum, In my search for S. tenuicosta, I found these fly.. I think this is also Hydrellia sp.? Is it correct that Scatella (Ephydridae) are a bit larger in size? Or is it my imagination? Robert Heemskerk attached the following image:  [81.14Kb] |
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| Robert Heemskerk |
Posted on 17-05-2007 00:07
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Member Location: Amsterdam, Netherlands Posts: 2082 Joined: 17.10.05 |
pic 2
Robert Heemskerk attached the following image:  [87.02Kb] Edited by Robert Heemskerk on 17-05-2007 00:07 |
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| Nikita Vikhrev |
Posted on 17-05-2007 07:34
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 Member Location: Moscow, Russia Posts: 9339 Joined: 24.05.05 |
You are right, Robert. Beware on your search that Hydrellia can be found on duckweed or simply in grass, Scatella on silt or stones near silt. Nikita Nikita Vikhrev - Zool Museum of Moscow University |
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| Tony Irwin |
Posted on 17-05-2007 19:57
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 Member Location: Norwich, England Posts: 7234 Joined: 19.11.04 |
Hi Robert There are big and small Scatella and Hydrellia, so size is not a good guide. Most European Scatella have darkened wings with milky-white spots. Also they have bristles along and above the mouth edge. Hydrellia have clear wings and bare faces. Hydrellia are a difficult group to identify to species, particularly from photos, but I think I see enough of the genitalia of this male to suggest that it is Hydrellia maura. Edited by Tony Irwin on 17-05-2007 19:58 Tony ---------- Tony Irwin |
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| jalbala |
Posted on 18-05-2007 00:52
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Member Location: Vitoria (Spain) Posts: 12 Joined: 19.06.05 |
Tony Irwin wrote: Hi Robert There are big and small Scatella and Hydrellia, so size is not a good guide. Most European Scatella have darkened wings with milky-white spots. Also they have bristles along and above the mouth edge. Hydrellia have clear wings and bare faces. Hydrellia are a difficult group to identify to species, particularly from photos, but I think I see enough of the genitalia of this male to suggest that it is Hydrellia maura. I found this Hidrellia in Spain. Is the same? Date of capture: 5 June 2005, 14:00. in Mediguren (Alava), near or Vitoria. Gathered with mesh when collecting another insect (Lispe sp.) in the surface of a small puddle occasional, already almost dry. Ground on limestone marls between marly cultures and heath. Sunny day with wind. Measures 2mm between face and end of the abdomen and 3,1mm between face and end of the wings. The ruptures of the costal vein are not appraised to 80 increases although irregularities in the zones corresponding to these ruptures in the ephydridos ones are appraised. Arista of antenna hairy in the superior part. jalbala attached the following image:  [104.3Kb] |
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| Tony Irwin |
Posted on 19-05-2007 16:09
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Member Location: Norwich, England Posts: 7234 Joined: 19.11.04 |
It is a male Hydrellia, but in this one, I cannot see the genitalia clearly enough to be able to suggest a species. 
Tony ---------- Tony Irwin |
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