Key to the South Korean Genera of Apocleinae

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  1. Cross vein formed by the base of the second submarginal cell positioned basal to the apex of the discal cell; grey flies; females with spines on 

     cerci . . . Philodicus cf. integer

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     - Cross vein formed by the base of the second submarginal cell positioned distal to the apex of the discal cell; not gray; females without spines on 

      cerci . . . Promachus Loew, 1848 . . . 2

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   2. Small (16 to 18mm) grey and black flies . . . Promachus nigribarbatus (Becker, 1925)

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     - Much larger (22 to 31mm) flies with bright yellow abdominal bands; or an overall dark brown color . . . 3

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   3. Without striking gold/yellow abdominal bands; overall dark brown or tan colored . . . Promachus sp.

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     - Bright yellow abdominal bands . . . 4

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    4. Anterior branch of 3rd vein (4th posterior branch of radius, R4) angulate and straight (Fig. #); males with all white dorsal epandrial setae . . .  Promachus                            yesonicus Bigot, 1887

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     -Anterior branch of 3rd vein (4th posterior branch of radius, R4) sinuous or curved (Fig. #); males with white and black dorsal epandrial setae . . . Promachus  cf.                  formosanus Matsumura, 1916

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