XoHTll A.MKKICAX Dll'TKHA. 



45 



10. Proboscis and palpi voiy imioli ])n)loiifio(1. . °Oi{TirocniLK 

 Proboscis and palpi not prolonged 11 



11 Scutelluni hairy oStbistroma 



Scutellum not liairj' 12 



12. Ilypop.Vfiiuni sessile Hercostomus 



lIyi)oi)yjj:ium peiluiiculated 13 



13. Second antennal joint of usual shape. . ° II vpopiivm.us 

 Second antennal joint rudimentary. . ° IIaltkiuckhus 



14. Abdomen of male laterally compressed. . . o Akkpsius 

 Abdomen of the male not compressed 15 



15. Second antennal joint of the usual transverse shape. Argyra 

 Second antennal joint with a thuml)-like projection over the in- 

 side of the third ° Syxtormon 



1(5. 'I'hird antennal joint in both sexes, or at least in the male, pro- 



lonfi'ed, pointed, and with an apical arista. ... 17 



Tliird antennal joint short even in the male, and if it should be 



somewhat prolon<;ed, then neither pointed nor with an apical, 



but at the utmost with a subajiical arista. ... 23 



17. Second antennal joint wltii a thundi-like projection over the 



inner side of the third Synautiikus 



Secon<l antennal joint without a thund)-like projection, trans- 

 verse. 18 



18. Posterior transverse vein distant from the margin of the wing; 



.palpi incuml)ent . 10 



Posterior transverse vein approximated to tlie margin of the 

 wing; palpi hanging down ° Aphrosylus 



19. Hypopygium pedunculated, free ^Systenus 



Hypopygium sessile, more or less imbedded. ... 20 



20. The male abdomen has five segments. . . °Smiliotus 

 The male abdomen has six segments. .... 21 



21. Third antennal joint prolonged also in the female. Rhaphm m 

 Third antennal joint of the female not prolonged. . . 22 



22. Third antennal joint of the male very much prolonged (small, 



less hairy species) ? Xiphandisium 



Third antennal joint of the male moderately prolonged (larger, 

 more hairy species) Poki'hvrops 



23. Fourth longitudinal vein forked Psilopis 



Fourth longitudinal vein simple 24 



