Key to the South Korean genera of Asilinae treated in this paper.

1. Dorsal occipital hair strongly proclinate; female abdominal tergites 6–8 elongated, compressed laterally (as in Astochia) .................................. Neoitamus Osten­Sacken

­ Dorsal occipital hair not strongly proclinate; female abdominal tergites 6–8 elongated (Astochia) or of different shape .................................................................................... 2

2. Male fore basitarsus with spatulate (spoon­like) bristles; epandrium with conspicuous paralobes and a sagging appearance; ovipositor elongated with five segments ............ ................................................................................ Astochia Becker in Becker & Stein

­ Male fore basitarsus without spatulate bristles; epandrium more erect; ovipositor less elongated with fewer than five segments ...................................................................... 3

3. Fore basitarsus stout and thickened........................................................... Asilella Lehr

­ Fore basitarsus not considerably thickened .................................................................. 4

4. Facial gibbosity reduced to mouth margin; epandrial lobe red/orange ........................... ................................................................................................. Aneomochtherus Lehr

­ Facial gibbosity not reduced to mouth margin; epandrial lobe not red/orange............. 5

5. Sternite 8 of males strongly excised with long medial hair; female ovipositor angulated and compressed, cercus embedded into tergite 9 and sharp on distal apex............ ............................................................................................................. Eutolmus Loew

­ Sternite 8 of males considerably less excised, or not at all; female ovipositor not angulated; cercus not embedded into tergite 9 ..................................................................... 6

6. Dark brown or yellow species; sternite 8 of male slightly excised medially (as in Mercuriana) or with a long fringe of apical hair ..................................... Machimus Loew

­ Dark black or gray species; sternite 8 of male thickened medio­apically, or male with toothed or notched epandrial lobes................................................................................ 7

7. Gray species; male dorsal epandrial lobes with medial dorsal tooth clearly visible; female cercus with spines .................................................................. Philonicus Loew

­ Black species; male dorsal epandrial lobes without notch, or tooth; female cercus rounded as in Machimus, almost as long as tergite 9, without spines. Mercuriana Lehr