A Monograph of the Formicidae of South Africa. 713 



feebly convex. The median area of the clypeus is a good deal wider 

 and its anterior margin is straight. The meso-epinotal suture is 

 very deep, so that the dorsum of the epinotum has a short and sub- 

 vertical basal face. The dorsum of the epinotum is flat and horizontal, 

 trapezoidal, two-thirds wider at the apex than at the base, a trifle 

 more than twice as long as wide at the base. The apical margin, 

 seen from above, is almost straight or at the most only feebly indented 

 in the middle, its lateral angles rounded and not dentate. Node of 

 petiole subcuboid as in sericeus, but more or less trapezoidal when 

 seen from above, the anterior margin and sides straight, the posterior 

 margin widest and convex. Seen from the side, it is convex from 

 front to back, not with a flattened and slanting dorsal face as in the 

 other species. Otherwise like sericeus. 



$ minor, 8-3-9 mm. Like the 2J., but with the head more narrowed 

 in front and the posterior margin fairly strongly convex. 



Valdezia, Transvaal, (Berthoud) ; S. Rhodesia, common. Nesting 

 in similar situations as sericeus, and having a tube of woven grass over 

 the entrance as in that species. 



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



Race Letheui, Forel. 

 Rev. Suisse Zool., vol. 24, p. 444, g, 1916. 



"$, 10 mm. Larger and above all more elongate than the type of 

 the species. Head one-fifth longer than wide, the posterior margin 

 strongly convex, not much wider behind the eyes than at the anterior 

 sixth. Differs also from the type of the species by the scapes which are 

 strongly dilated in the apical half, and by the fine yellowish pilosity, 

 much more abundant on the body, oblique on the legs, (long and erect 

 on the femora). The epinotum and node are also coarsely reticulate 

 and of quite a different shape. The epinotum is not marginate ; its 

 dorsum is very convex and ends in a short, concave and smooth 

 declivity, without forming an angle with the same. The node is as 

 thick as it is high, convex above, very little wider than long, with its 

 anterior and posterior faces subvertical, (slightly convex). This 

 race differs from the race sankisianus Forel, chiefly in its sculpture, 

 and also by the shape of the epinotum and the abundant pilosity. 

 Otherwise like the type of the species, especially the fine, dull and 

 reticulate-punctate sculpture. 



Shiluvane, Transvaal, collected by M. Juuod and received from the 



