ASH MEAD : CLASSIFICATION OF THE CHALCID FLIES 235 



The genus Platyscapa Motschulsky I do not know, but, judging from Mot- 

 schulsky's description, it seems to be one of these insects, and I have included it in 

 my table with the hope that it may be rediscovered, and its proper position in our 

 system definitely settled. 



TABLE OF GENERA. 



1. Females 2 



Males 4 



2. Postmarginal vein obsolete or nearly ; maxillary palpi with rows of teeth along the under side 3 



Postmarginal vein well developed, longer than the stigma! vein ; maxillary palpi without rows of teeth 



beneath. 



Antennae 13-jointed, with 2 ring-joints, of which the second is rather large ; hind tibiae with 



rows of comb-like teeth at apex ; stigmal vein not short Sycophaga Westwood 



(type Cynips sycomori Hasselquist), 

 Antennae 9-jointed {teste Motschulsky) ; hind tibiae normal ; stigmal vein short. 



Platyscapa Motschulsky (type P. frontalis Motsch.). 



3. Antennae 11-jointed ; hind tibiae without rows of teeth at apex Crossogaster Mayr 



(type C. triformis Mayr). 



4. Apterous 5 



Winged. 



Postmarginal vein subobsolete ; head with a large, deep triangular fovea anteriorly that extends 

 posteriorly to the middle of the head ; antennae 11-jointed Crossogaster Mayr. 



5. Head oblong, without a deep triangular fovea anteriorly ; antennae 3-jointed 6 



Head nearly quadrate, a little wider than long, with a deep, triangular fovea anteriorly. 



Antennae 8-jointed, the scape thick, depressed ; body broad Crossogaster Mayr. 



6. Scape of antennae about as broad as long ; mandibles broad, 3-jointed ; tarsal joints 2-4 wider than 



long ; abdomen terminating in two long filaments, one on each apical angle... Sycophaga Westwood. 

 Scape of antennae long, subclavate, more than twice longer than thick; mandibles conical, without 

 teeth ; tarsal joints 2-4, not wider than long ; abdomen not terminating in two long filaments. 



Apocrypta Coquerel (type A. perplexa Coquerel). 



Family LXI. TORYMID^. 



1833. Torymidse, Family II. (partim) Walker, Ent. Mag., I., p. 115. 

 1846. Torymidse, Family I., Walker, List Chalc. Brit. Museum, I., p. 14. 

 1848. Torymidse, Family I., Walker, opus, cit, II., p. 100. 

 1856. Torymoida3, Familie XL, Forster, Hym. Stud., 11. , pp. 19, 23 and 43. 

 1875. Torymina, Tribus (partim) Thomson, Hym. Skand., IV., pp. 11 arid 59. 

 1886. Toryminse, Subfamily (partim), Howard, Ent. Amer., I., p. 198. 

 1897. Torymidse, Family XLL, Ashmead, Proc. Ent. Soc. Washington, IV., p. 243. 

 This is a very large and most interesting family, approaching nearest, on one 

 side, to the genuine fig-insects (Agaonidse) ; on the other side exhibiting affinities 

 that ally it to the Ghalcididse, and some forms in the Miscogasteridx and the Ptero- 

 malidse. 



