Lejops (Polydontomyia) curvipes (Wiedemann, 1830).
Wiedemann, C.R.W. (1830) Aussereuropaische zweiflugelige Insekten. Zweiter Theil. Schulz, Hamm. xii + 684 pp., 5 pls. [1830.09.22]
Lejops curvipes ranges from Alaska to Manitoba, south to California and Mexico (Thompson 2010).