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The key includes
Chyromya femorella Fallen 1820 and
C. flava Linnaeus 1758 as well as 3 species now placed in
Gymnochiromyia:
Gymnochiromyia concolor Malloch 1914,
G. minima Becker 1904, and
G. nigrimana Malloch 1914.
An additional
Chyromya species listed in Nearctica,
C. oppidana Scopoli 1763, isn't included in the key.