Key to genera of the subtribe Apodacrina

1. orb seta-like, numerous (10–40), arranded as a tuft in posterior part of parafrontalia (figs 20, b–d). Vibrissal angle placed above oral margin, lunula in lower part strongly narrowed (fig. 21, d). {: t 2 and often f 2 with a ctenidium consisting of strong thick spine-like setae (figs 20, e; 22, e)................................. ........................................................................................................................ Xerophilomyia Rohdendorf, 1925

— Proclinate orb absent or arranged as a row with 1–6 setae. Vibrissal angle placed at oral margin, lunula in lower part not narrowed. {: legs without ctenidium. ................................................................................2

2. Proclinate orb absent or present as 1–2 fine setae (figs 13, b–d). Postpedicel 4–10× as long as pedicel..... .................................................................................................................................. Xeromyia Rohdendorf, 1925

— Proclinate orb present as 3–6 pairs of strong setae (figs 1, c; 2, c). Postpedicel 3–5× as long as pedicel (figs 1 d; 2 d). ...................................................................................................................... Apodacra Macquart, 1854