0>i some South African Ichneumonidae. 361 



TRIBE ICHNEUMOXIDES. 

 SUBTRIBE OXYPYGINI. 



BYSTRA, Cain. 

 Aiiu. Nat. Hist, ix, 1902, p. 149. 



Generic Characters. Head with the occiput obtusely margined, the 

 cheeks strongly buccate, the labruni exserted and upper mandibular 

 tooth the longer. Antennae stout and, beyond their centi-e, strongly 

 compresso-dilated ; basal flagellar joints but little longer than broad. 

 Metathorax with complete areae and linear spiracles, its apex sub- 

 vertically declivous; areola subcrescentic or hexagonal, basally not 

 curved. Scutellum deplanate, laterally and apically cariuate. Abdomen 

 with only seven visible discal segments ; ventral segments two to four, 

 and base of the fifth, plicate ; terebra not strongly exserted. Tibiae 

 and tarsi spinulose. Areolet pentagonal ; basal uervure continuous 

 through median ; nervelet more or less distinct. I here give a revised 

 account of this genus since, upon examining the genotype, from India, 

 I found several of Cameron's characters quite erroneous and these are 

 rectified above. The genus is excluded from the Joppides only by its 

 lack of basal metanotal sulcus. One species alone has hitherto been 

 known. 



BYSTRA QUADRATA, sp. uov. 



$ only. A rufesceut-testaceous species, finely punctate and some- 

 what dull with the anus glittering ; pleurae, sternum and coxae 

 subflavescent. Pace, clypeus, cheeks, all the orbits broadly, and the 

 eighth to sixteenth flagellar joints, white; costa, mandibular apices 

 and remainder of flagellum, alone black. Face deeply and not very 

 closely punctate ; lateral clypeal foveae large ; whole disc of thorax 

 very closely and finely punctate, with notauli obsolete and the petiolar 

 area both discreted and shagreened ; metanotal areae entire and strong, 

 with areola hexagonal, basally truncate and hardly longer than broad. 

 Abdomen a little narrower than thorax ; petiole slender, not short, and 

 half breadth of postpetiole, which is convex and finely shagreened with 

 no cariuae nor punctures ; gastrocoeli small and lateral ; second and 

 third segments evenly and very finely punctate, dull with apex of the 

 latter and whole of remaining segments glabrous and uitidulous ; 

 hypopygiurn not extending to base of the black and hardly exserted 

 terebra. Legs normal and not slender; hind coxae obsoletely punctate 

 and not scopuliferous, their tibiae a little curved. Areolet pentagonal, 



