172 L. O. HOWARD. 



Subfamily PROCTOTRUPiNiE. 



This subiamily consists of the single genus Proctotrupes, which is 

 sufficiently distinguished by its untoothed mandibles from all other 

 Proctotrupid genera. A number of species of this genus are figured 

 by Snellen Van Vollenhoven in his Pinacographia with more than 

 his usual care. Several North American species have been described 

 by Say, Provancher and Patton. 



Subfamily Scelionin^. 

 Antemial club not jointed. 



Winged Genus Tlioron Haliday, 9- 



Unwinged or with short wing-pads. 



Without mesoscutellum t (renus Bieus Haliday. 



With an evident scutellum Genus Aeolus Foerster. 



Antennal club jointed. 

 Subniarginal vein shortened, not reaching costa.-f Genus Bseoneura Foerster. 

 Submarginal vein not shortened, reaching costa. 



Marginal vein very long, at least four or five times as long as stigmal. 



Mesoscutum with two sharp, distinct, complete fiyrows ; antenna? of % 

 long, with whorled hairs ( 9 club-shaped). 



Genus Xenoiiieru!^ Walker. 

 Mesoscutum not furrowed ; % anteunse not with whorled hairs. 

 Hind tarsi thickened ; middle tibiie with weak spurs. 



t Genus Teleas Latreille. 

 Hind tarsi not thickened ; middle tibiae without spurs. 



t Genus Prosacantha Nees. 

 Marginal vein short, usually shorter than stigmal. 



First segment small, the abdomen not broadening from it. 



Second segment largest * Genus Telenoinu!^ Haliday. 



Third segment largest. 



Stigmal vein thickened at base Genus .4.iiteris Foerster. 



vStigmal vein not thickened at base Genus Baryeonus Foerster. 



First segment broad ; abdomen broadening from it. 



Face with a sharp spur | Genus Sparasioii Latreille. 



Face without a spur. 



Postmarginal vein strongly lengthened, longer than stigmal. 



Metascutellum with a spur Genus Triniorus Foerster. 



Without spur. 



Antennae tiliform, 9 Genus Apegus Foerster. 



Antennffi club-shaped 9 1 or filiform % . 



Marginal vein punctiform ; last joint of antennal club twice as 



long as the preceding joint Genus Gryon Haliday. 



Marginal vein half as long as the shaft of the stigmal ; last 

 joint of antennal club scarcely longer than jireceding. 



* Genus Hadronotiis Foerster. 

 Postmarginal vein is wanting, or is shorter than stigmal. 



Postmarginal wanting •■■Genus Scelio Latreille. 



Postmarginal present, 1)ut much shorter than stigmal. 



Genus Idris Foerster. 



