A Monograph of the Formicidae of South Africa. 197 



$ . 5-56 mm. Piceous, antennae, mandibles and legs ochreous. 

 Head dull, reticulately rugose, except the central area between the 

 antennal sockets and the median ocellus, which is smooth and shining. 

 Rest of body faintly rugulose and very shining. Pilosity similar to 

 that of the £ , but shorter, and more abundant on the abdomen. 

 Legs and antennae with a pale and long pubescence, more abundant 

 on the latter. Head wider than long ; eyes large, placed anteriorly 

 and occupying more than half the sides of the head. Anterior margin 

 of clypeus straight. Frontal carinae obsolete. Scape very short, very 

 little longer than the long diameter of the median ocellus ; 1st joint 

 of the flagelluui a little wider than long, the remaining joints all 

 much longer than wide. Pronotum not visible from above ; meso- 

 notum gibbous, and very convex anteriorly, wider than long. Scutellum 

 rounded behind and gibbous. Petiole not unlike that of the $ , but 

 the peduncle of the 1st joint is much shorter and wider, the node is 

 also broader and flatter, and longer than wide. The posterior femora 

 are laterally compressed, and strongly sinuate along their basal half. 

 Wings hyaline, nervures pale yellowish. 



Orange Free State, Basutoland, and Cape Province. (S.A.M., 

 G.A. colls.) 



Var. Arnoldi, Forel. (Plate V, figs. 52, 52a, 55.) 



Ann. Soc. Ent. Belg., vol. 57, p. 138, £ , <y, 1913. 



Pace ahdominalis, Santschi, Goteborgs K. Vetens. o. Vitterh. Handl., 

 xv, 2, p. 16, 1914. 



^ . Like the var. Foreli, this differs from the type species in having 

 the node of the 1st joint of the petiole longer than wide. The colour 

 of the head is lighter, the dorsal profile of the thorax less concave in 

 the middle. The $ is like that of the type. 



S. Ehodesia, common. (S.A.M., P.M., G.A. colls.) 

 Pace ahdominalis, Santschi. I have seen examples of this form, 

 which have the basal portion of the 1st abdominal segment slightly 

 longer, making the abdomen appear narrower. This character does 

 not appear to me to be sufficient to separate them fi'om var. Arnoldi. 



Var. Foreli, n. v." 



£ . 7"8 mm. This differs from the preceding and the type by its 

 bright red colour, the stronger striation of the thorax, and by the 

 sculpture of the 1st joint of the petiole, which is deeply and trans- 

 versely striate on the whole of the node and the peduncle. The median 

 excision on the anterior margin of the clypeus is also less deep. The 



