A Monograph of the Formicidae of South Africa. 317 



and in the sculpture. This is much weaker, and the striatum of the 

 head between the frontal carinae is sparser ; the spaces between the 

 striae on the head and thorax are very finely reticulate and duller than 

 in the type species or flaviceps. The 1st node of the petiole is a little 

 thicker, and the dorsal face of the 2nd node much more convex length- 

 wise. , The pilosity is shorter and scantier, especially on the abdomen, 

 which is microscopically alutaceous. 



Hillside, Bulawayo ; forming fairly populous nests in the ground, 

 and occasionally in the mounds of Platythyrea lamellosa-rhodesiana. 

 (S.A.M., R.M., G-.A. colls.), type in my collection. 



T. Titus, Forel. 



Ann. Soc. Ent. Belg., vol. 54, p. 427, £ , 1910. 



" $ . 3 mm. Mandibles smooth, shining, finely and very sparsely 

 punctured, with two teeth in front, and a denticulate margin behind. 

 Clypeus not carinate, the anterior margin narrowly excised in the 

 middle, behind which is an impressed line. Head quadrate, slightly 

 narrowed in front, as wide as long, hardly concave behind. Eyes 

 placed in the middle of the sides. The frontal carinae and the scapes 

 extend back as far as the posterior 8th of the head. The scape lies in 

 a demiscrobe which is decidedly shallow, entirely smooth, and not 

 delimited externally except by the sculpture. The club of the antenna 

 is about as long as the rest of the flagellum, of which the 2nd-8th 

 joints are wider than long. Pro-mesonotuin without a suture, convex 

 in all directions, feebly marginate, but fairly clearly marginate in front 

 and laterally ; seen from above, it is shaped like a trapeze, narrowed 

 behind, slightly longer than it is wide in front. Meso-epinotal suture 

 deep. Dorsum of epinotum strongly convex in its anterior half, distinctly 

 longer than wide, excavated between and in front of the spines, margi- 

 nate at the sides. Declivity marginate by a downward extension of 

 the edge of the spines. The latter wide at the base, pointed, as long 

 as the interval between them. Episternal teeth small and triangular. 

 The 1st node forms a thick scale, biconvex and narrow, hardly thicker, 

 but much narrower, than that of T. {Xiphomyrmex) Weitzaeckeri, with 

 a small and obtuse summit ; the peduncle as long as the base of the 

 scale. Second node transversely oval, nearly twice as wide as the 1st. 

 Head longitudinally striato-rugose, shining, reticulate-rugose at the 

 sides. Clypeus and thorax very shining, with a feeble and not very 

 close, longitudinal striation. Dorsum of the pro-mesonotum partly 

 smooth. The rest of the body smooth and shining. Pilosity fine, 

 yellowish, pointed, fairly short, sparse on the body and absent from 



