Descriptions of New Sj^ecies of Parasitic Hymenoptera. 131 



The I'ecurrent nervure is interstitial ; the transverse median received 

 shortly behind the transverse basal ; the disco-cubital is distinctly 

 broken by a stump of a nervure ; the transverse median in hind 

 wings is broken shortly above the middle. The hind legs are stout 

 and long ; the four front claws are cleft ; the hinder long, curved, 

 largely dilated at the base ; the hind femora stout, dilated ; they are 

 as long as the coxae and trochanters united. 



This may not be a true Arotes, which has not, in the typical species, 

 the recurrent nervure interstitial, but is received before it. There is 

 no other genus in which it could be placed, except Siphimedia, but 

 that, inter alia, has a hidden labrum and a rounded clypeus. 



TEYPHONID^. 



EXOCHINI. 



PLESIOEXOCHUS, Cam. 

 Plesioexochus bufipes, Cameron. 

 Trans. South African Phil. Soc, xv., 1905, p. 203. 

 Cape Colony. Neighboui'hood of Cape Town. 



EXOCHUS, Gravenh. 

 ? ExocHus FULVOPiLOsus, Cam., I.e. 202. 

 Cape Colony. Stellenbosch. 



BASS INI. 



BASSUS, Fabr. 

 Bassus l^tatorius. Fab. 

 This now (originally European) cosmopoHtan species is in the 

 collection from Cape Town, where it has been taken as early as 1874, 

 and is now probably established. It has been taken in 1884 and 

 1887, and I have seen an example captured recently. It would be 

 interesting to know on what Dipteron it is parasitic. Probably it 

 has followed one of its European hosts — perhaps Eristalis tenax — in 

 its progress round the globe. 



TRYPHONINI. 

 PHILOTYMMA, Forst. 



PhILOTYMMA ? FLAVICEPS, Sp. UOV. 



Pale yellow, the back of the abdomen rufous ; the ocellar region, 

 the part surrounding the scutellum, the centre of the metanotum, 



