52 Annals of the South African Museum. 



and bright fulvous. 3rd to 5th ventral segments with long golden 

 hairs on their apical margins. 



This species is an exceedingly fast ant which occasionally may be 

 seen foraging in very irregular columns. It is common in the neigh- 

 bourhood of Bulawayo, and nests under stones or in deserted 

 termite mounds. 



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



0. hottentota, Emery. (Plate II., fig. 12.) 

 Bull. Soc. Ent. Ital., vol. 18, p. 360, g , 1886. 



$ . 10-11 mm. Black ; very similar to Berthoudi, but differs in 

 the following features. The pubescence is denser and of a more 

 fulvous tint. The head is shorter and not so parallel-sided, the eyes 

 are placed farther forwards and the mandibles are broader and not 

 so long. The epinotum is less compressed laterally and broader on 

 top, and not so long or so flat ; it is compressed near the base and 

 then rises in a slight hump and is continued in a gradual curve to 

 the brow of the declivity. The latter, seen from above, has a much 

 less angular outline than in Berthoudi. Seen from above, the node 

 of the petiole is much narrower in front than in Berthoudi, and is 

 only slightly emarginate in the middle posteriorly, and also not 

 bisinuate nor obtusely angled laterally. The tooth of the ventral 

 lamella is shorter and more acute. 



$ . 11-12 mm. Black. Mandibles obtuse and obliquely trun- 

 cate at the apex ; posterior margin of the head not reflexed so as to 

 form a collar. Frontal area shining and indistinctly defined. The 

 head is more transverse than in Berthoudi, since the base of the 

 head is much wider than in that species. Antennae, mandibles, 

 tarsi and apical third of all the femora, ferruginous. 



It is easily distinguished from Berthoudi by the following characters. 

 Head, thorax and base of abdominal segments with golden, not 

 pruinose, pubescence. Piligerous punctures entirely absent, the 

 whole body shining, especially the abdomen and node of petiole. 

 The latter is more sharply truncate posteriorly and feebly sinuate 

 in the middle. The ventral segments are more densely fimbriated 

 and the 6th ventral segment is produced on each side into a long, flat 

 and spatulate appendage, densely fimbriated at the apex. Wings 

 wider and longer than in Berthoudi. 



Willowmore. (Brauns.) Cape Province generally, and Sebakwe, 

 Mashonaland. I have not met with it in Matabeleland. 



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



