A Monograph of the Formicidae of South Africa. 185 



especially on the cheeks and on the legs. Moderately shining ; head, 

 thorax and petiole very finely rugulose or reticulate ; the head is also 

 scantily punctured, the abdomen finely so, the punctures piligerous. 

 The mandibles are longitudinally striate, with scattered punctures, the 

 masticatory margin furnished with four or five teeth, and merging in 

 a curve with the internal margin. The elongate and quadrangular 

 head is wider than the thorax, about one and a half times as long as 

 wide, almost parallel- sided, slightly narrower in front than behind. 

 The short clypeus has an unarmed, and widely but shallowly emarginate 

 anterior border. The frontal carinae are placed close together, diverging 

 slightly posteriorly. Frontal area wanting. The frontal sulcus is 

 clearly marked only between the anterior third of the carinae. The 

 scape reaches back to the anterior third of the eye, the 2nd-10th joints 

 of the flagellum wider than long. Ocelli absent. The rather large 

 oval eyes occupy about one-third of the sides of the headland are 

 situated distinctly behind the middle of the latter. In front of, and 

 above the posterior margin of the head there are two circular foveae, 

 more or less distinctly margined and rugosely granulate ; the diameter 

 of each of these pits is about one-fifth or one-sixth of the posterior 

 margin of the head ; the latter is arcuately emarginate. The thorax 

 is distinctly wider in front than behind, only the sides of the 

 pronotum are marginate, and the dorsum is not very convex. The 

 pronotum, seen from above, is somewhat longer than wide, wider in 

 front than behind, the rectangular anterior corners rounded. The 

 pi'o-mesonotal suture is distinct. The mesonotum is hardly longer 

 than it is wide in front, and very little narrower behind than in front. 

 A metanotum is not indicated, its stigmata lie just in front of the 

 shallow constriction between the meso- and epinotum. The dorsum 

 of the latter is longer than wide, and merges into the equally long and 

 transversely convex declivity. The first joint of the petiole has a very 

 short peduncle, its node is of an elongate pyriform shape, not marginate 

 laterally ; seen in profile, the node is steeper in front than behind ; 

 the 2nd joint of the petiole is shorter and about twice as wide as the 

 first, wider than long, and wider in front than behind. Abdomen 

 oblong, moderately pointed apically, the 1st segment longer than wide." 

 Delagoa Bay and Zanzibar. (Brauns.) 



S. (Sub-genus Tetkaponeka) ambigua, Emery. 



Ann. Soc. Ent. France, vol. 63, p. 23, £ , ? , 1895. Forel, Schultze, 



Eeise Siid Afrika, vol. 4, p. 5, $ , 1910. 



" 5 , ? • Testaceous, flagellum pubescent, punctate, dull, eyes in 

 the middle of the sides of the head, pronotum marginate, the rest of 



