170 L. O. HOWARD. 



Hind wings not lobed. 



The front tiTii» with two spurs Snbfixniily C'erapliroiiiiiic 



Front tibias with one spixr. 

 Mandibles not toothed Su])fiuuily Proctotrupiiia'. 



Mandibles toothed. 



Abdomen acutely margined on the sides ; antenns- arise near tlie iiorder 

 of the mouth. 

 Wings with a marginal vein and occasionally also with a stignial ; the 



unwinged genera without ocelli Subfamily Scelioiliiiie. 



Wings without marginal and stigmal veins; all genera with ocelli. 



Subfamily Platygasteriiiie. 

 Abdomen not acutely margined ; antenuie arise far aliove the border of 

 the mouth. 

 Hind wings without a trace of a median vein. 



Hind wings very small, almost linear Subfamily Iflyinariiise. 



Hind wings broader, not linear Subfamily DJapriiite. 



Hind wings with a median vein. 



Fore wings with or without a regular l)asal vein ((inuuJader) ; Hagel- 



lum without a ring-joint Subfamily Belytiu^. 



Fore wings with an abruptly broken basal vein, from one end of which 

 arises a cubital vein distinguished by its irregular couise ; lioth 

 together these form an ii-regular discoidal cell ; flagellum with one 

 ring-joint Subfamily Heloriiite. 



Subfamily Dkyinin^. 



Vertex deeply impressed. 



With wings * Genus Dryiiius Latreille. 



Without wings "••• Genus Gouatopus Ljungh. 



Vertex convex, not impressed. 



Oi'tiput deeply concave ; vertex and neck separated by a sharp angle. 



Genus Ijabeo Haliday. 

 Occiput delicately concave ; vertex and neck not so markedly separated. 



Fore tarsi with scis.sor-like or ])incer-like claws, 9 ! pronotum visible above, 

 but not longer than mesonotum, % . 

 Fourth tarsal joint of the fore tarsi much longer than third, 9 ; pronotum 

 as long as. or nearly as long as mesonotum, %, 9 ■ 



t Genus Clielog.ynus Haliday. 

 Fourth tarsal joint as long as, or scarcely longer than third, 9 : pronotum 



much .shorter than mesonotum, % 9 Genus Aiiteoii Jurine. 



Fore tarsi not scissor- or pincer-like, 9 ; pronotum above not visible, or 

 longer than mesonotum, % . 

 Pronotum much longer than mesonotum ; mesonotum without a trace of 

 a furrow ; wings short, spoon-shaped. 



Genus Mystropltoriis Foerster. 

 Pronotum above not, or very slightly vi.sible ; mesonotum very strongly 

 developed ; me.soscutum with distinct furrows ; wings fully de- 

 veloped, % 9 Genus Aphelopns Dalman. 



