324 Transactions of the South African Philosophical Society. 



the outer edge. Calcaria testaceous ; tarsal claws bright rufous. 

 The middle of the front at the antennae projects into a keel, which 

 becomes widened below. 



This is certainly not 0. globicola Stadel. (also from the Cape of 

 Good Hope) ; the distinct furrow leading from the ocelli to the 

 antennae (absent in the species here described) should separate the 

 two ; if Stadelmann's figure is correct, the fore ocellus is separated 

 by a greater distance from the posterior than it is in my species. 

 0. fervida Sm. from Natal appears to be, so far as can be made out 

 from the incomplete description, a different and larger species. Only 

 its $ has been described. In capensis the apices of the abdominal 

 segments, under the hair bands, are lead-coloured. 



Gen. PEOSOPIS, Fab. 

 Prosopis robertiana, sp. nov. 



First recurrent nervure interstitial, the second received near the 

 apex of the second cubital cellule. Black ; the head below the 

 antennae, i.e., the face, cheeks, and clypeus, the anterior tibiae in 

 front, the hind tibiae to near the middle and the basal joint of the 

 hind tarsi, bright yellow. Flagellum of antennae from the pedicle 

 brown, black above. Wings hyaline, the nervures black. The 

 yellow mark on the face broad above, not extending to the base 

 of the antennae, shortly obliquely narrowed ; the central mark on 

 the face small, square. $ . 



Length 5 mm. 



Head closely punctured, the punctures on the face and clypeus 

 more widely separated than they are on the front and vertex. The 

 lower half of the front is raised in the centre, the raised part 

 extending between the antennae, widened below, bordered by fine 

 keels, and bearing two longitudinal striae. Mesonotum closely and 

 rather strongly punctured ; the scutellum is as strongly, but not so 

 closely punctured. Metanotal area stoutly, irregularly, closely 

 reticulated ; it is bordered behind by a keel. Metapleurae more 

 strongly and distinctly punctured than the mesopleurae. Abdomen 

 shining, sparsely finely punctured. 



Is not unlike P. curvicarinata Cam. ; which species may be known 

 by the first recurrent nervure being received in the apex of the 

 first cubital cellule ; it is also larger ; the labrum and mandibles are 

 yellow, not black; the lateral yellow marks on the sides of the face 

 are longer, project more above, and, instead of being gradually 

 narrowed to a point above, have the upper part narrowed, it being 



