334 MEMOIRS OF THE CARNEGIE MUSEUM 



2. Head tridentate, with deep autennal furrows ; a sharp, high carina or spine between the antennae ; 



marginal vein long 3 



Head normal, not tridentate 4 



3. Head with a long spear-like process ; mandibles very large, three fourths the length of the head ; 



antennae 10-jointed Paralsesthia Cameron (type P. mandihularis Cam.). 



Head without a long, spear-like process ; mandibles not large ; antennae 9-jointed, sometimes apparently 

 only 8-jointed, two of the terminal joints being closely united, without a visible suture between. 



Cerocephala Westwood (type C. cornigera Westw.). 



4. Facial impression wanting ; antennae 10-jointed, inserted close to the mouth border. . Spalangia Latreille 



(type 8. nigra Latr.). 

 Facial impressiom distinct ; antennae 9-jointed, inserted just above the clypeus. 



Paraspalangia Ashmead, g. nov. (type P. annulipes Ashm.). 



5. Head not tridentate, normal 6 



Head tridentate, with deep antennal furrows and a long spine or sharp carina between 7 



6. Mandibles verji- large, three fourths the length of the head ; antennae 10-jointed. .Paralaesthia Cameron. 

 Mandibles normal, not large ; antennae 11 or 12-jointed Cerocephala Westwood. 



7. Facial impression wanting ; antennae 12-jointed Spalangia Latreille. 



Facial impression distinct ; antennae (?) 10-jointed (broken) Paraspalangia Ashmead. 



Subfamily V. Diparin^. 

 1875. Diparides, Subtribus, Thomson, Hym. Skand., IV., 1875, p. 217. 

 1886. Diparides, Tribe, Howard, Ent. Amer., II., pp. 33 and 35. 

 1897. Diparinse, Subfamily V., Ashmead, Proc. Ent. Soc. Washington, IV., p. 236. 



The peculiarities in the venation of the front wings alone will distinguish this 

 subfamily, although there are other characters not easily defined. The marginal 

 vein is very long, as long, or nearly, as the subcostal vein, the costal cell being ex- 

 ceedingly narrow, the postmarginal vein is also long. 



The head in front is convex or subconvex, not depressed, the antennse being 

 usually long and inserted on the middle of the face, the scape long and slender, the 

 funicle 6-jointed, the club stouter and 3-jointed. The metathorax is longer than 

 usual, with distinct lateral carinse, while the abdomen is ovate, somewhat depressed, 

 and distinctly petiolate. 



The species are rare and only two genera have been characterized. 



TABLE OF GENERA. 



1. Females 2 



Males 4 



2. Petiole linear, longer than the hind coxae 3 



Petiole shorter than the hind coxae. 



Abdomen oval ; antennae 13-jointed, subclavate, inserted near the middle of the face, the joints 



of the funicle stout, subequal, very gradually shortening Panstenon Walker 



(type Miscogaster oxylus Walk.). 



