176 L. O. HOWARD. 



Mesonotum without furrows.. .f Genus Diapi'ia Latrcille, 9- 

 Wings with a basal vein. 



Mesonotum with furrows ; club 5-jointed. 



Genus Idiotypa Foerster, 9 . 

 Mesonotum without furrows; club at most 1-joiuted. 



Genus lioxotropa Foerster, 9 

 Antennte 13- or 14-jointed. 

 Antennfe 13-jointed. 



Club with only one joint Genus IVIoiielata Foerster, 9' 



Club with more than one joint. 

 Abdomen conically pointed. 



Genus Paramesius Westwood, 9 

 Abdomen truncate at tip. 



Marginal vein absent Genus Heinilexis Foerster, 9 • 



Marginal vein preseut..Geuus Spiloiiiicrus Westwood, 9 

 Antennae 14-joiuted (mesonotum with furrows). 



Genus l»olypeza Foerster, 9 • 



Subfamily Belytin^e. 



Male. 

 Eyes naked. 



Mesoscutum without furrows Genus Isinariis Haliday. 



Mesoscutum with furrows Genus Psiloiiinia Foerster. 



Eyes hairy. 



Postscutellum with a strong thorn Genus Oxylabis Foerster. 



Postscutellum without a thorn. 

 Middle carina of metanotuni divided before its end and enclosing a cen- 

 tral space (radial cell open or closed). 



t Genus JSely ta Jurine. 

 Middle carina of metanotuni not divided. 

 Radial cell wanting or open. 

 Stigmal and postmarginal so much shortened that the radial cell can 

 scarcely be seen. 



Basal vein not visible Genus Synacra Foerster. 



Basal vein plainly present Genus Paiitolyta Foerster. 



Radial cell more or less plainly present. 



Fore tibiae strongly bent outwards, with a blunt or sharp tooth or a 



sharp thorn Genus Zygola Foerster. 



Fore tibise not so bent Genus Aclista Foerster. 



Radial cell clo.sed. 

 Petiole of abdomen not longer, or scarcely longer than metanotuni. 

 Border of scape at tip produced on one side into a tooth. 



Genus Acropiesta Foer.ster. 

 Border of scape at tip not produced. 



Last ventral segment very straight and punctured. 



Genus Aiiectata Foerster. 

 Last ventral segment somewhat bent, not punctured. 



Genus Pantoclis Foerster. 

 Petiole of abdomen almost twice as long as metauotum. 



