Posted by Raimo on 07-09-2014 15:51
#3
Thankyou Gunnar, most likely is what one can say with these difficult flies (as I understand it).
Posted by Gunnar M Kvifte on 07-09-2014 18:53
#4
With specimens it isn't very difficult, provided you have the right literature. But the characters used in the literature are very rarely visible in photographs.