ASHMEAD : CLASSIFICATION OF THE CH ALGID FLIES 237 



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



nervure distinct, straight Subfamily V. MEGASTiGMiN-as. 



6. Abdomen in 9 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 7 Subfamily VI. Oemyrin^. 



SuBFifMILY I. iDARNINiE. 



1846. Agaonidse, Family 6 (partim), Walker, List Chalc. Brit. Museum, I., p. 23. 

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



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

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

 Cynipidx and the Eurytomidse, and in at least another group in the Torymidse, i. e., 

 the Megastigminse. 



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

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

 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 antennge, a character also found in the 

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

 at the apex, as in that family. 



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

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

 pressed, without a prominent ventral valve, or subcompressed with a prominent 

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

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



TABLE OF GENEEA. 



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. Antennae 10-jointed .- 4 



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



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



antennae scarcely thrice the length of the pedicel PMlotrypesis Forster. 



(type Cynips caricae Hasselq.). 



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

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



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



Polanisa Walker (type /darnes transiens Walk.). 



