Thread subject:
Diptera.info :: Probably common
Posted by Paul Beuk on 19-08-2005 15:54
#4
Maybe melanistic. In some species, the very dark specimens often are intersexes (
Scaeva
,
Melanostoma
,
Pyrophaena
,
Parasyrphus
). I do not know if the same thing happens in
Eristalis
.