ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 237 



5. Stigmal vein in front wings terminating in a large rounded or dilated knob or stignia, the basal 



nervure distinct, straight Subfamily V. Megastigmin.k. 



6. Abdomen in ? conic-ovate or produced at apex, in (^ oblong, usually with a peculiar sculpture in both 



sexes, the middle segments most frequently with transverse rows of pits or rounded punctures ; 

 stigmal vein very short Subfamily VI. Ormyrin^. 



Subfamily I. iDARNiNiE. 

 1846. Agaoiiida;, Family 6 (partim), Walker, List Chalc. Brit. INliiseum, I., p. 23. 

 1897. Idarninaj, Subfamily I., Ashmead, Proc. Ent. Soc. Washington, IV., p. 235. 



All of the species composing this subfemily are found associated with the genuine 

 fig-insects ; they are either inquilinous or genuine parasites, as is the case in the 

 Cynipidx and the Etirjjtomuhe, and in at least another group in the Torymidaj, i. e., 

 the ^ fejast igmimi'. 



The group comes nearest to the subfamily Toryminie, agreeing with it closely in 

 cephalic and thoracic characters, and in having two apical spurs on the hind tibi* ; 

 but here the resemblance ceases, and it is easily separated by the difference in vena- 

 tion, shape of abdomen, etc. 



The males are most frequently apterous, the head being long or oblong, with a 

 triangular fovea anteriorly in which lie the antennae, a character also found in the 

 Agaonidse ; but the abdomen is short and never tubularly lengthened nor broadened 

 at the apex, as in that family. 



The females agree somewhat with the Agaonidx in venation, but differ decidedly 

 in cephalic, mandibular, and abdominal characters, the abdomen being either de- 

 pressed, imthout a prominent ventral valve, or subcompressed with a prominent 

 ventral valve, with a long ovipositor. From the Toryminx they are at once distin- 

 guished by the long stigmal vein and the different shape of the abdomen. 



TABLE OF GEXERA. 



1. Females 1 



Males 16 



2. Abdomen normal, the last two segments not tubular 2 



Abdomen abnormal, the last two segments very narrow and produced into a kind of tube or tail, the 



ovipositor very long 3 



3. Antennje 10-jointed. 4 



AntenniB 13-jointed, with three ring-joints; mesonotum witli distinct parapsidal furrows. 



Seventh abdominal segment very long, longer than the preceding segments united ; scape of 



antennffi scarcely thrice the length of the pedicel Philotrypesis Forster. 



(type Cynips caricve Hasselq.). 



Seventh abdominal segment hardly as long as the preceding segments united ; scape of antennie 

 long, about four times as long as the pedicel Sycoscaptella Westw. (type S. affinia Westw.). 



4. Prothorax long, conical ; metathorax long ; legs short and .-itout, the front femora incrassated. 



Polanisa Walker (type/rfarnes transiens Walk.). 



