Posted by Patrik E on 02-03-2020 18:39
#1
I have tried to determine this Copromyzinae with Pitkins- the lesser dung flies and the key leads me to Crumomyia roserii
- 1: Postocular setae in irregular rows.
-2: One pair of well-developed setae on postpronotal lobe.
- 3: Wings fully developed and hindtibia without anteroventral setae about the middle.
-4: It is a small species,2,4-2,5 mm with shining anepisternum and yellow-brown tibiae.
But when I compare with pictures of C.roserii it is a black fly (except for the tibiae) and so are all the other european Crumomyia as far as I can see.Where have I gone wrong ? or is my fly newly hatched and not fully coloured yet ?
The fly was found in june25,in the middle part of Sweden,on a bucket with nutrition-water for the garden.Lots of horses in the close neighborhood.
Edited by Patrik E on 03-03-2020 11:44
Posted by daveb21 on 02-03-2020 19:33
#6
Hi Patrick,
Teneral Copromyzinae are generally this colour, if there is a distinction between the tibia and femora in colour i.e. you can tell the femora will be black/dark and the tibia light then C roserii should be fine.
Posted by Patrik E on 03-03-2020 11:42
#7
Thanks for the quick reply and for explaining the pale colour !
There is no obvious colour difference tibia/femora and even the anepimeron is mostly polished and shining,so this should be a teneral C.fimetaria,the species closest to C.roserii in the key.
Best Regards
Patrik