ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 319 



8. Metathorax produced at apex into a 'subglobose neck; postmarginal vein always longer than the 



stigma! 9 



Metathorax not produced into a subglobose neck at apex, rarely with a small neck ; postmarginal 

 vein veiy rarely longer than the stigmal, most frequentlj' shorter, or of an equal length 21 



9. P,edicel always distinctly longer than the first funicle joint, more rarely of an equal length ; the first 



joint of funicle usually the shortest of the funicle joints ; metathoracic spiracles small, round, oval, 



long oval or elliptical 10 



Pedicel usually shorter than the first joint of the funicle, never longer ; the first joint of the funicle 

 usually the longest of the funicle joints ; metathoracic spiracles large, oblong-oval or elliptical. 18 



10. Antennae with two ring-joints 11 



Antennae with three ring-joints 17 



11. Metathoracic spiracles oblong-oval, the lateral folds and the median carina present 12 



Metathoracic spiracles not oblong-oval 13 



12. Abdomen conic-ovate, the third and fourth segments subequal, united as long as the second, the fifth 



hardly as long as the fourth or sixth ; flagellum subclavate, the joints of the funicle gradually de- 

 creasing in length, not transverse ; head wide, the temples oblique but rather broad. 



Polyscelis Dalla Torre (type Pteromalus conspersvs Walk.). 

 Abdomen ovate, pointed at apex, depressed above, keeled beneath ; antennfe clavate. 



Paphagus Walker (type P. sidx Walk.). 



13. Metathorax with the lateral folds and usually the median carina present ; abdomen ovate, beneath boat- 



shaped or carinate ; flagellum clavate or subclavate, the club large, thicker than the funicle. 



Meraporus Walker (type M. graminicola Walk.). 

 Metathorax with the lateral folds complete, the median carina absent ; abdomen short oval, convex 

 beneath ; flagellum filiform or nearly, not or only slightly thickened towards apex, the joints trans- 

 verse, the club subulate ; head transverse, the vertex subacute, the temples flat and very narrow. 



Endomychobius Ashmead (type E. flavipes Ashm.). 



15. Metathoracic spiracles oval , 16 



Metathoracic spiracles small, rounded. 



Metanotum without a median carina ; abdomen conic-ovate, beneath subconvex, the second seg- 

 ment occupying about one third the whole surface, segments 3-6 subequal, the 7th the long- 

 est, the 8th conical ; flagellum filiform, or at the most subclavate ; marginal vein long, slightly 

 thickened Scymnophagus Ashmead, g. nov. (tyjie 8. townsendi Ashm.). 



16. Metathoiax veiy short, smooth, imiuuictate, with a median carina; scutellum convexly rounded ; ab- 



domen short, ovate, not longer than the thorax, boat-shape beneath, the second segment occupying 

 one third the surface, the following short, subequal. 



Epipteromalus Ashmead, g. nov. (type E. algonquinensis Ashm). 



17. First two ring-joints minute, equal, smaller than the third ; funicle joints wider than long ; metathorax 



not short, the lateral folds incomplete, the spiracles oval ; abdomen ovate, as long as the head and 

 thorax united. 



18. Abdomen ovate, not longer than the head and thorax united, usually a little shorter, the apical mar- 



gins of the segments straight, not incised or emargiuate 19 



Abdomen conic-ovate, often carinate beneath, and usually a little longer than the head and thorax 

 united, the second segment the longest, the third usually the shortest, both sometimes, but not always, 

 with a slight incision or emargination at apical middle ; segments 4-6 most frequently increasing in 

 length, the eighth conical ; sometimes segments 2-5 are subequal 20 



