A Monograph of the Formicidae of South Africa. ' 401 



C. otii, Forel, race fricatidorstjs, Santschi. 



Loc. cit., p. 26, £ . 



"$ . 3 mm. Black ; margins of the mandibles, flagelhim and 

 tarsi brownish-red. Scape, tibiae and apices of the femora red-yellow. 

 Dull, dorsum of thorax and the abdomen subopaque. Sculpture much 

 less coarse than in Wissmanni and otii, the rugae on the head finer 

 and closer together, the spaces between them punctate and fairly 

 shining. The rugae are effaced on the middle of the thorax, thus 

 forming a space more weakly rugose, which is bordered by a network 

 of thicker rugae which tend to become concentric. The rugae are 

 transverse on the pronotum, longitudinal on the mesonotum, and 

 again more or less transverse on the dorsum of the epinotum. 

 Declivity finely punctured, with a few striae between the spines. 

 Both nodes longitudinally rugose and sulcate. Abdomen reticulate- 

 punctate, striate over the basal fourth or fifth. Pilosity very short 

 and sparse, a little more so than in Wissmanni, Forel. Head nearly 

 as wide as long, narrowed in front, the posterior margin straight, the 

 posterior angles armed with two teeth which are stronger than in 

 Wissmanni. Eyes fairly convex, one-third longer than the distance 

 between them and the posterior angles, margined on the inner side by 

 a stronger rugosity. Mandibles finely rugose (striate in Wissmanni). 

 Thorax short, hardly one-quarter longer than wide (nearly one-half in 

 Wissmanni), without sutures, strongly dentate on the lateral margins. 

 Dorsum of epinotum shortened, the spines shorter and more elevated 

 than in Wissmanni. First node as long as wide in front, with a foot- 

 shaped ventral lobe. Second node one-third wider than long, twice as 

 high as long, the sides rounded. Abdomen short, the sides convex, 

 emarginate in front. 



" Dukudu, Zululand (Traegaordh)." 



C. Wissmanni, Forel. 

 Mitth. Schweiz. Ent. Ges., vol. 9, p. 78, £, 1894 



" $ . 3 - 5 mm. Allied to intrudens, but smaller and narrower, the 

 oval eyes much larger, flatter and more prominent outwardly. They 

 are not emarginate in front, and are as long as the distance between 

 them and the base of the mandibles. Head longer than wide, very 

 moderate 1 narrowed in front, nearly straight behind, with two small 

 teeth near each posterior angle. Pro- and mesonotum together almost 

 circular, the margins dentate. Epinotal spines slightly divergent, as 



