A Monograph of the Formicidae of South Africa. 323 



Head a little longer than wide, tlie sides more convex behind the 

 eyes than in front of them, hardly narrower in front than behind, the 

 posterior margin shallowly concave. Eyes fairly large, placed in 

 the middle of the sides. Frontal carinae divergent, extending back as 

 far as the occiput, and forming the upper margin of shallow, but 

 fairly distinct demiscrobes. Scapes not reaching the occipital margin 

 by as much as their own width ; 2nd-7th joints of the flagellum wider 

 than long, the 8th as long as wide. Clypeus carinate in the middle. 

 Mandibles closely and very finely striate, with 3 distinct teeth in 

 front, and 4 feeble teeth behind. Thorax moderately constricted 

 between the meso- and epinotum, very slightly so between the pro- 

 and mesonotum. Pro-mesonotal suture obsolete, meso-epinotal wide 

 but shallow. Pronotum sloping fairly steeply downwards in front, the 

 shoulders rounded. Thorax submarginate, narrower than the head. 

 Dorsum of epinotum widest at the base, about one and a third times 

 longer than wide, not much longer than the declivity ; epinotal teeth 

 wider at the base than long, somewhat obtuse. Episternal teeth 

 triangular, a little longer than the epinotal. Peduncle of petiole very 

 wide and nearly as long as its node; the latter, seen from above, wider 

 than long, transversely oval, narrower in front than behind, indistinctly 

 hexagonal in outline ; seen in profile, the anterior face vertical, the 

 posterior face oblique and merging gradually into the dorsal face. 

 Second node transversely oval, one-third wider than long and wider 

 than the 1st, convex above, transversely and lengthwise. Femora only 

 slightly swollen. 



Victoria Falls. (P.M., G.A. colls.) 



T. pusilltjm, Emery. 

 Ann. Soc. Ent., France, vol. 63, p. 38, $ , 1895. 



"^. 17 mm. Ferruginous-testaceous, head dark, abdomen piceous ; 

 pilose hairs subclavate, scanty, legs with a shorter pubescence. 



" Head subrectangular, frontal carinae subparallel and extending 

 back almost to the posterior margin; closely punctured, the cheeks 

 anteriorly and the frons very finely and longitudinally striate ; 

 mandibles shining, punctate ; thorax hardly marginate, longitudinally 

 rugoso-reticulate, epinotum obtusely bidentate, peduncle of petiole 

 punctate, the node angular above, barely longer than thick, 2nd node 

 subglobose, the abdomen shining. 



" 9 . 2 - 5 mm. Piceous, mandibles, antennae, legs, and apex of 

 abdomen testaceous ; head and peduncle of petiole sculptured as in 

 the £ , mesonotum and scutellum longitudinally striate, the epinotum 



