708 Annals of the South African Museum. 



epinotum and the abdomen finely striolate transversely, the abdomen 

 duller than the thorax. Erect pilosity coarse, obtuse, white, disposed 

 marginally on the epinotum, scale and abdominal segments, sparsely 

 distributed elsewhere. Pubescence very short, decumbent, fairly 

 scarce all over except on the antennae. Head cylindrical, obliqiiely 

 truncate in front ; seen in profile, it forms a trapeze of which the 

 base is as long as the height ; seen from above, it is square, with the 

 angles slightly rounded. Eyes of medium size, placed at about the 

 posterior third of the sides. Frontal carinae very divergent, the 

 interval between them being double their distance from the eyes ; 

 they limit a scrobe which can accommodate the anterior half of the 

 scape. The latter, fairly compressed, extends by almost one-fourth 

 of its length beyond the hind margin of the head. Frontal area 

 rounded posteriorly. Clypeus narrow, one and a half times longer 

 than wide, flat or very feebly carinate, the anterior margin roundly 

 lobate, the sides marginate. On each side of the clypeus there is a 

 large semioval depression, limited outwardly and behind by the 

 raised margin of the truncation, inwardly by the sides of the clypeus. 

 Mandibles sculptured like the head, 6-dentate. Pronotum a good 

 deal narrower than the head, with feeble shoulders, not marginate. 

 Mesonotum as long as the pronotum, forming in profile together with 

 the epinotum a nearly straight horizontal line, (barely convex). 

 Metanotum distinct. Dorsum of the epinotum convex transversely, 

 forming with the declivity a slightly obtuse angle, almost rectangular. 

 The declivity, which is as long as the dorsum, is marginate, slightly 

 concave below, its rounded upper margin subogival. Scale thin, 

 four to five times as high as thick, the anterior face fairly convex, the 

 posterior face almost flat, the margins trenchant, the summit arcuate- 

 Abdomen higher at the base than the scale, as wide as the head, oval. 

 Tibiae cylindrical, not setose below." 



Caledon, Cape Prov. (Dr. L. Peringuey), 1 2|. 



Type in the S.A.M. coll. 



Sub-genus ORTHONOTOMYRMEX, Ashmead. 

 Canadian Entomologist, vol. 37, p. 384, 1905. 



For characters see table of sub-genera. 



With the exception of Barbarossa and vividus, all our species of 

 this sub-genus have a very strong sculpture on the head and thorax, 

 plainly visible under a low magnification, and consisting of a sharply 



