Key to males of species of the Fannia lepida- group

1 Hind femur with one complete av row, the setae becoming distinctly stouter toward the apex.......................... 2

- Hind femur without av row, with only 2 strong av on distal half................................................. 3

2 Legs entirely black........................................................................... F. immutica

- At least tibiae reddish....................................................................... F. oregonensis

3 Eye with short and sparse hairs; arista with short cilia; hind tibia with 2 av; basicosta brown; presutural acr triserial, distance between the two outer acr rows equal to the distance between acr row and dc row.......................... F. grahami

- Eye bare; arista bare; hind tibia usually with 1 av; basicosta brownish-yellow; presutural acr biserial, distance between the two outer acr rows narrower than the distance between acr row and dc row..................................... F. lepida