A Monograph of the Formicidae of South Africa. 445 



longer than wide, as wide behind as in front (wider in capensis), the 

 sides distinctly angular in the middle. 



Xoce River, S. Rhodesia. (S.A.M., R.M., G.A. colls.) 



Var. bulawayensis, Forel. 

 Loc. cit., p. 215, %, $ . 



% . Like the type-species but darker, brownish-black. The funda- 

 mental sculpture of the head is stronger, even on the posterior third, 

 so that the whole head is duller than in the type. 



5 . Brownish-black, including the epinotum. The reticulate- 

 punctate sculpture of the epinotum and sides of mesonotum much 

 sharper than in the type-species. (The dorsum of the mesonotum is 

 smooth and shining, not reticulate-punctate as erroneously stated in 

 Forel's description.) The posterior lateral angles of the pronotum 

 are raised into distinct bosses and the second segment of the petiole 

 has the sides convex. Otherwise like the type of the species. 



Bulawayo. (S.A.M., R.M., G.A. colls.) 



This and the type-species are at least partly graminivorous, as the 

 nests contained accumulations of grass seeds. 



P. Arnoldi, Forel. 

 Ann. Soc. Ent. Belg., vol. 57, p. 130, %, $ , 1913. 



1/ . 4 mm. Dark brown, sometimes the posterior half of the head 

 and the pro-mesonotum paler or castaneous brown. Antennae, 

 excluding the basal half of the flagellum, and the femora brown, 

 tibiae yellowish-brown, tarsi and basal half of flagellum brownish- 

 yellow. Pilosity yellowish, short and more or less erect on the head, 

 longer but -less abundant on the thorax, much longer and fairly 

 abundant on the abdomen. Pubescence yellowish, scanty on the 

 body, more abundant on the legs and antennae. 



Anterior half of the head moderately shining, longitudinally striate 

 and reticulate at the sides, striate on the vertex between the frontal 

 carinae (the striae divergent) ; the spaces between the striae at the 

 sides somewhat roughened. Posterior half of the head polished and 

 shining, sparsely and finely punctured. Pronotum and disc of 

 mesonotum shining, nearly smooth in the middle, faintly rugulose and 

 transversely striate in front and at the sides. Epinotum and sides 

 of mesothorax reticulate and dull. Nodes transversely rugulose, 

 moderately shining. Abdomen shining, feebly and longitudinally 

 rugulose at the base. 



