444 Annals of the South African Museum. 



specimens before me the longitudinal groove between the inner and 

 outer margins which is mentioned by Forel) . Median area of clypeus 

 not carinate, the anterior margin shallowly concave. Frontal area 

 much smaller than in capensis, indistinctly defined and not depressed 

 (deeply depressed in capensis). The pronotum is wider in relation to 

 its length than in capensis, and the posterior lateral angles are larger 

 and more prominent. The pro-mesonotal suture is distinctly defined 

 by a transverse ridge. The posterior margin of the scutellar region 

 of the mesonotum is tumid and raised on each side into a small but 

 distinct tubercle (only faintly indicated in capensis). The dorsum of 

 the epinotum is more concave and the epinotal teeth are longer and 

 more divergent ; they are longer than their basal width and half as 

 long as the space between their bases. First node wider than in 

 capensis, the dorsal edge more deeply emarginate. Second node 

 shorter, its lateral angles spinose, the apices blunted. Abdomen 



h 

 Fig. 24. — P. xocensis, Forel. 



longer and narrower, the sides only feebly convex, longer than 

 wide. 



^ . 2 , 3-2"6 mm. Dark brown, epinotum and petiole paler, legs, 

 mandibles and antennae brownish-yellow. Moderately pilose, the 

 hairs on the abdomen longer than elsewhere, the pubescence on the 

 legs and antennae very sparse. Shining and fairly smooth. The 

 sides of the head between the eyes and frontal carinae only very 

 faintly striate. Epinotum and sides of mesonotum reticulate-punctate 

 and dull. Head more or less oval, a trifle longer than wide, a little 

 narrower behind than in front, the posterior margin very shallowly 

 concave and narrower than in capensis, the posterior angles more 

 convex. Mandibles shining, feebly striate and punctate. Eyes placed 

 in the middle of the sides of the head. Scapes a little longer than in 

 capensis, extending beyond the posterior margin of the head by twice 

 the length of the first joint of the flagellum. Mesonotum longer and 

 at a higher level above the epinotum than in capensis, its transverse 

 impression much shallower. Dorsum of epinotum narrower, two- 

 thirds longer than wide. The first segment of the petiole is a little 

 shorter, the node thicker than in capensis. Second segment a little 



