Key to genera of Ulidiini

1. Antennal groove shallower than height of first flagellomere...................................... Physiphora Fallén

-. Antennal groove as deep as height of first flagellomere or deeper............................................... 2

2. Scutum microtrichose, usually with pattern of shiny and matt areas; if scutum non-microtrichose, gena more than half as high as eye................................................................................. Timia Wiedemann

-. Scutum not microtrichose, entirely shiny; gena less than half as high as eye............................. Ulidia Meigen