Helophilus (Helophilus) obscurus Loew
Diagnostic description:
Helophilus (Helophilus) obscurus Loew, 1863.
Loew, H. 1863. Diptera Americae septentrionalis indigena. Centuria quarta. Berl. Ent. Z. 7: 275-326.
Distribution:
Nearctic species known from Alaska to Quebec, south to British Columbia, Colorado and New York (Thompson 2010).