Posted by Menno Reemer on 07-12-2011 12:19
#3
Although I hardly have experience with Nearctic Eristalis, I am quite certain that this is neither E. nemorum nor E. cryptarum.
Possibly, but far from certain, this is E. saxorum or E. obscura (= E. pseudorupium). I know the latter species from Europe, and here it looks a little different...