A Monograph of the Formicidae of South Africa. 155 



wider than long, curving very gradually from base to apex so that the 

 dorsal and declivous portions cannot be distinctly defined. Abdomen 

 oblong, as long as the head and thorax together. Other characters 

 as in the £ . 



3 . l - 7 mm. (Hitherto undescribed.) Brownish black, front of 

 head, epinotum and last 3 segments more or less flavous, mandibles, 

 tibiae and femora fuscous, tarsi pale yellow. Pubescence micro- 

 scopic, the whole body shining and impunctate. Head narrowing 

 towards the occiput, widest across the eyes, one-third wider than 

 long ; eyes large, occupying nearly the anterior half of the sides of 

 the head ; ocelli on a slightly raised area, not very large. Clypeus 

 shorter than in the § , otherwise similar. Mandibles well developed, 

 with a sharp apical tooth, the masticatory margin minutely 

 denticulate., Scape just reaching the occiput, as long as the first 6 

 joints of the flagellum, all the joints of the latter, except the 2nd, 

 longer than wide, the 2nd as long as wide, the 1st joint half as long 

 again as the 2nd. Pronotum not exposed ; mesonotum one-third 

 wider than long, Mayrian furrows obsolete, parapsidal sutures well 

 defined ; scutellum less than half as long as the mesonotum, and as 

 wide as long. Epinotum widest at the base and as long as wide at 

 the base. Abdomen ovate, all the segments much wider than long. 

 Genital armature exserted. Wings slightly tinged with yellow, 

 nervures very pale, stigma faintly fuscous. 



Bulawayo, in a hollow stem of an Acacia. Plumtree, S. Ehodesia, 

 in a hollow gall. Small nests, containing about 30 individuals. 



Type of $» and $ in my collection. (S.A.M., E.M., G.A. colls.) 



T. Voeltzkowi, Forel, var. Ehodesiae, Forel. (Plate IV., fig. 43.) 



Voeltzkow's Eeise Ost Afrika, vol. 2, p. 84, $ , 1907. (Variety) Ann. 

 Soc. Ent. Belg., vol. 57, p. 139, $ , 1913. 



£ . 2 - 5-3 mm. Black, clypeus, femora and scape brown, 

 mandibles, flagellum brownish yellow, tibiae, tarsi, coxae and base and 

 apex of femora pale straw-yellow. A very short and inconspicuous 

 pale pubescence all over, and a few long pilose hairs on the clypeus 

 and mandibles. Head shallowly but closely reticulate. Thorax 

 shallowly reticulate-punctate, the puncturation being strongest on 

 the mesonotum. Body slightly shining, the mesonotum and 

 epinotum duller than the rest. Head a trifle longer than wide, the 

 sides convex, the posterior margin moderately concave, the posterior 

 angles strongly rounded. Eyes large, situated just in front of the 

 middle of the sides of the head. Frontal carinae flat, linear and 



