156 Annals of the South African Museum. 



sub-parallel. Clypeus with a deep and abrupt emargination in the 

 middle anteriorly, which extends quite half the length of the clypeus, 

 and is deeper than wide. Mandibles triangular, widest at the base, 

 shining and sparsely punctured, masticatory margin with about 

 8 acute teeth, the apical the longest. The scape reaches back 

 beyond the occipital margin by less than the length of the eye. 

 Flagellum one-third longer than the scape, all the joints longer than 

 wide. The thoracic sutures well denned, the posterior rather deep. 

 Pronotum wider than long, rounded in front, the sides very convex, 

 the dorsum moderately so. Mesonotum longer than wide, as long 

 as the pronotum. Dorsum of epinotum wider than long, rising 

 gradually from the suture towards the brow of the declivity, the 

 latter sloping obliquely, longer than the dorsum and with the brow 

 angular. Petiole flattened, longer than wide, widest in front of the 

 middle and pointed at its base. Abdomen ovate. This variety 

 differs from the type only in having the head a little wider behind, 

 in the less convex sides, and the slightly longer scapes. 



Bulawayo, nesting in grassy soil ; not common. 



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



T. geacilis, Forel. 

 Ann. Soc. Ent. Belg., vol. 57, p. 140, % , 1913. 

 £ . 2 mm. Ochreous ; apex of abdomen, flagellum and 

 posterior tibiae and femora brownish. Sub-opaque (Forel says 

 " densely punctured " ; if so, the punctures are too small to be 

 resolved even under a magnification of 65 diameters). Pubes- 

 cence short, decumbent and yellowish. Pilose hairs absent. 

 Head almost quadrate and rather flat, not more than one- sixth 

 longer than wide, sides nearly straight, posterior margin straight, 

 hind angles widely rounded. Eyes large, situated more dorsally 

 than laterally, a little in front of the middle of the head. Clypeus 

 three times as wide as long, anterior margin with a shallow median 

 emargination. Frontal carinae closer to each other than they are 

 to the eyes. Mandibles smooth, narrow, largely hidden under the 

 clypeus, and with about 4 or 5 teeth. The scape extends back 

 beyond the occipital margin by one-third of its length ; the 2nd 

 joint of the flagellum two and a quarter times longer than wide, 

 nearly as long as the 1st. Thorax narrow, elongate, with the dorsal 

 profile nearly horizontal, therein differing markedly from our other 

 two species. The pronotum is a little wider than long, mesonotum 

 two-thirds as long as the pronotum. The dorsum and declivity of 

 the epinotum of equal length ; the declivity is very oblique, sloping 



