Posted by Bert Oving on 19-10-2015 09:17
#1
17-06-2015, Karinthiƫ, Austria, Altitude 1638m
Posted by Zeegers on 19-10-2015 10:52
#2
Yes, except for the fact that alpina is considered a doubtful species and many authors treat it as a synonym to caerulescens
http://www.diptera.org/NomenclatorDetail.php?Recn=529816
Trixa caerulescens is extremely variable in my experience !
Theo