Thread subject: Diptera.info :: Muscid ---> Helina sp. [f]

Posted by Roger Thomason on 30-06-2022 23:37
#1

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...?

Edited by Roger Thomason on 04-07-2022 11:15

Posted by Roger Thomason on 30-06-2022 23:38
#2

2nd pic...

Posted by Roger Thomason on 30-06-2022 23:39
#3

close up...[ish]

Posted by eklans on 01-07-2022 20:52
#4

Hi Roger, is not evecta which should have black legs and I haven't found the right one yet.

Posted by eklans on 02-07-2022 10:53
#5

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 11:00

Posted by Stephen R on 02-07-2022 21:29
#6

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.

Posted by Roger Thomason on 04-07-2022 11:14
#7

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!! ;)