276 MEMOIRS OF THE CARNEGIE MUSEUM 



G. Funiclo filiform, the first joint large. 



Marginal vein slender, always longer than the stigmal vein ; abdomen ovate 7 



Marginal vein thickened, not longer than the stigmal vein. 



Body short ; clypeus bidentate ; mandibles 3-dentate Xenocrepis Fiirster 



(type denorrcpis areiiicola Thorns.). 



7. Abdomen with a yellow band at base ; metathora.x short, wilh a median carina and lateral folds ; cly- 



peus separated, anteriorly arcuate Dimaclius Thomson (type Pteromalus discolor Walk.). 



Abdomen inlhout a yellow band at base ; metathorax not .short, without a median carina ; clypeus 

 separated, smooth, with a median tooth anteriorly. . Hemitrichus Thomson (type H. rufipes Thoms.). 



8. Flagcllum with the first joint short 9 



Flagellum with the first joint long, cylindrical 10 



9. Antennae .short, clavate in both sexes, inserted a little below the middle of the face ; clypeus at apex 



truncate ; metathorax rather short, without lateral folds, tlie spiracles rounded.. ..Habritus Thomson 



(type Pteromalus brevicornis Ratzeburg). 

 Antennte filiform, inserted on the middle of the face ; clypeus at apex with a median incision ; meta- 

 thorax not long, without a median carina, spiracles large, nearly linear Dinarmus Thomson 



(type D. acutus Thoms.). 



10. AntennfE filiform, insei-ted on the middle of the face, the funicle joints all longer than thick ; clypeus 



anteriorly with a median sinus ; metathorax not short, without lateral folds, median carina, or spir- 

 acular sulci, the spiracles oval Arthrolysis Fiirster (type Pteromalus scabriculiis Nees). 



11. Antennfe 12-jointed, with tivo ring-joints 12 



Antennte 13-jointed, with two ring-joints 13 



12. Marginal vein not thickened, longer than the stigmal vein ; metanotum .short, smooth but with a dis- 



tinct median carina, the spiracles small Metastenus Walker. 



Marginal vein thickened, not longer than the stigmal vein ; metanotum jjunctate, with a median 

 carina Disema Forster. 



13. Pronotum not distinctly separated 14 



Pronotum distinctly separated 16 



14. Marginal vein slender, always longer than the stigmal vein 1.5 



Marginal vein thickened, not longer than the stigmal vein. 



Clypeus bidentate ; mandibles 3-dontate Xenocrepis Fiirster. 



15. Metathorax .short, %vith a median carina Dimachus Thomson. 



Metathorax not short, without a median carina. Hemitrichus Thomson. 



16. Antennse inserted on the middle of the face, long 17 



Antennie inserted somewhat below the middle of the face Habritus Thomson. 



17. Metathorax without a median carina, the lateral UtMs prfsoil, the spiracles large, nearly linear. 



Dinarmus Thomson. 

 Metathorax without a median carina, the lateral folds absent, the spiracles oval. Arthrolysis Foister. 



Subfamily III. MISCOGASTERINtE. 

 1833. MiscogasteridjB, Family IV (partim), Walker, Ent. Mag., I., p. 370. 

 1835. Ormoceridffi, Family (partim). Walker, Eiit. Mag., I., p. 167. 

 1835. Pteromalidaj, Family (partim). Walker, Eiit. Mag., II., p. 286. 



