A Monograph of the Formicidae of South Africa. 707 



$ minor, 4*9-6 mm. Brown, the anterior half of the head and the 

 pronotum paler. Legs and antennae ochreous, mandibles reddish 

 brown. Very finely reticulate-rugulose, the abdomen transversely 

 rugulose. Head and thorax feebly shining, the abdomen very 

 shining. Pilosity and pubescence as in the 2J., but the pilosity on the 

 head is longer and not obtuse, confined to the clypeus and vertex, a 

 little less abundant than in the 2J. . Head oval, two-fifths longer than 

 wide, very little wider behind the eyes than in front of them. Eyes 

 large and convex. Clypeus convex, carinate, the anterior margin 

 moderately convex. Frontal carinae as wide apart behind as they 

 are long. The scapes extend beyond the hind margin by two-fifths of 

 their length. Sides of the epinotum and of the posterior half of the 

 mesonotum vertical. Dorsum of epinotum two and a half times 

 longer than wide, joining the shorter declivity in a wide arc. Scale 

 of the petiole as in the 2J. but a little thinner. 



?, (hitherto undescribed), 8-4 mm. Dark brown, the anterior third 

 of the head, the pronotum and scutellum more or less reddish ochreous- 

 brown. Head very steep in front and sculptured like that of the 21, 

 with the same abundant and obtuse pilosity on the front part. Clypeus 

 carinate. The head is longer and narrower than in the 2]., the sides 

 more convex and more convergent anteriorly, the posterior margin 

 convex. Thorax like that of aequitas Santschi. Scale of the petiole 

 wider than in the 2J., the dorsal edge straight. Dealated. 



Durban, (Marley, Cooper). 



(S.A.M., R.M., G.A. colls. ; type of the ? in my collection). 



Sub-genus COLOBOPSIS, Mayr. 

 For characters see table of sub-genera. 



C. bifossus, Santschi. 



Ann. Soc. Ent. France, vol. 85, p. 293, 2L, 1916. 



"2J., 7 mm. Black, the anterior two-thirds of the head ochreous, 

 brownish ochreous behind, as also the mandibles. Antennae, scrobes 

 and tarsi brownish, posterior margins of the abdominal segments 

 narrowly testaceous. Almost dull. Head and thorax densely and 

 finely reticulate-punctate. The head is also covered with coarse 

 rugae, generally reticulate, especially in front and at the sides where 

 they form numerous irregular pits. These rugae are more or less 

 serpiginous and elongated behind and in front. Declivity of the 



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