A Monograph of the Formicidae of South Africa. 525 



as far as the posterior margin of the head. The posterior corners 

 of the pronotum more tumid than in the type-species, the pro-mesonotal 

 suture deeper and wider, especially at the sides. 



This race differs from the type-species chiefly in the structure 

 of the mesonotum and epinotum. The declivity of the former is 

 vertical, forming an abrupt angle with the upper plane, sharply 

 marginate at the sides, the margins extending forwards almost as far 

 as the pro-mesonotal suture and produced at the junction of the two 

 planes into a small dentiform projection. The meso-epinotal suture is 

 much deeper than in the type. The dorsum of the epinotum is strongly 

 convex at the base, the convexity starting at the suture ; the teeth are 

 longer, and directed more upwards. The 1st segment of the petiole 

 is a little longer, and the median groove of the second is deeper. 

 Otherwise similar to the type of the species. 



Victoria Falls. Nesting in a hollow branch of a Combretum. 

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



Race infaceta, var. pudica, Santschi. 

 hoc. cit., p. 499. 



$ . 3 - l-4*8 mm. Differs from the race in the following characters: 

 The colour of the head, thorax and petiole is paler, of a dark reddish- 

 brown. The sides of the head are less convex. The anterior plane of 

 the mesonotum is merely obtusely marginate at the sides, and the 

 pro-mesonotal suture is shallower and narrower at the sides. In the 

 larger specimens the dorsum of the epinotum is transversely rugose. 

 The epinotal spines are somewhat shorter than in the race, except in 

 the larger £' ^ . 



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



C. Kneri, Mayr. 



Verb. Zool. Bot. Ges. Wien, vol. 12, p. 762, $ , 1862. 



£ . 4-5 mm. Head and abdomen ochreous-red, the abdomen 

 darker and more brownish. Thorax and petiole reddish-yellow. 

 Mandibles, anterior margin of the head, flagelluin and tarsi fuscous- 

 ochi*eous, scapes, tibiae and femora brownish-ochreous. Pubescence 

 pale, Avhitish-yellow, short, decumbent, scanty on the head and almost 

 wanting on the thorax. Erect pilosity sparse, occurring only on the 

 clypeus, pronotum, petiole and ventral surface of abdomen. The 

 fundamental sculpture of the head and thorax is a fine, deuse and 

 rather superficial reticulation. On this is superimposed a coarser 

 sculpture as follows: Anterior half of head from the cheeks to the 



