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Diptera.info :: Identification queries :: Diptera (adults)
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Muscid ---> Helina sp. [f]
Roger Thomason
#1 Print Post
Posted on 30-06-2022 22:37
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Location: Mossbank,Shetland Isles.
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Female Helina evecta in the Gallery seems the best match I can find for this one I photographed in my garden last week. Correct or...?
Roger Thomason attached the following image:


[166.13Kb]
Edited by Roger Thomason on 04-07-2022 10:15
 
Roger Thomason
#2 Print Post
Posted on 30-06-2022 22:38
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2nd pic...
Roger Thomason attached the following image:


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Roger Thomason
#3 Print Post
Posted on 30-06-2022 22:39
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close up...[ish]
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eklans
#4 Print Post
Posted on 01-07-2022 19:52
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Hi Roger, is not evecta which should have black legs and I haven't found the right one yet.
Greetings, Eric
 
eklans
#5 Print Post
Posted on 02-07-2022 09:53
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Hi Roger, after agonizing over this fly I have to propositions:
1. if the meron has fine hairs below the posterior spiracle:
- eyes almost bare, apices of femora and both posterior pairs of tibiae reddish yellow:
H. trivittata
2. if radial node bare on both sides:
- at most apices of mid and hind femora yellow
- prealar shorter than p npl, nearly indistinct
- fore tarsomeres not dilated
- scutellum entirely bare underside?
- hind tibia with 1-4 pd in basal half
- 4 post dc
- hind femur with 1 or more pv near apex longer than depth of femur, longest aristal hairs longer than postpedicel width?
- ...scutal stripes narrow & indistinct:
H. setiventris
But in the end it's a guess...
Based on the key of Manual of Central European Muscidae (Gregor, Rozkošný, Barták, Vaňhara)
Edited by eklans on 02-07-2022 10:00
Greetings, Eric
 
Stephen R
#6 Print Post
Posted on 02-07-2022 20:29
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Location: Clitheroe Lancashire UK
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Hi Roger and Eric,
Looking at the species descriptions in Gregor &c, H. trivittata seems to be ruled out by 'Female hind femur without posteroventrals', but setiventris looks plausible in this repect - 'Female pvs before apex of hind femur long'. But there's also meant to be a complete row of avs.
 
Roger Thomason
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Posted on 04-07-2022 10:14
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Hi Eric and Stephen, thanks for your responses to this thread. You aren't supposed to agonize over a fly Eric, really!! I'm happy I managed to get the genus correct so lets just call it a Helina sp. and I can stick a photo in my Flickr page without some member of The FLY POLICE giving me a hard time.

Regards Roger

PS. Now if someone could go agonize over my other unanswered posts I would appreciate it... THX!! Wink
 
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Date and time
12 August 2022 07:36
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