A Monograph of the Formicidae of South Africa. 283 



wider than long ; the posterior face convex, the anterior nearly 

 vertical, convex transversely. The 2nd node is one and a quarter 

 times higher than long, rounded above, as wide as, but not so high 

 as the 1st, and a little wider than long. 



Matopo Hills, S. Rhodesia. Running over the branches of a tree 

 (species unidentified). This tree has a dark green bark, covered with 

 a thin yellowish and parchment-like outer skin, which is also waxy. 

 The colour of the ant matches that of this skin very closely, so that 

 even when moving about it is difficult to detect. I have never taken 

 this species except on this particular kind of tree, and it is not un- 

 likely that the ant feeds on the waxy exudation. (S.A.M., R.M., G.A. 

 colls.) 



M. Leimbachi, Forel. 

 Bull. Soc. Vaud. Sc. Nat., vol. 50, p. 246, £ , 1914. 



5 . 2 mm. Pale ochreous ; the legs very pale ; the apical half of 

 the abdomen brownish yellow. Smooth and shining, impunctate, 

 excepting a few feeble punctures on the vertex. Pubescence absent, 

 except on the legs. Pilosity short and very scanty, more decumbent 

 than in Arnoldi. Head very little longer than wide ; the sides dis- 

 tinctly convex ; the posterior margin straight. Eyes situated within 

 the anterior third of the head. Median area of clypeus projecting 

 somewhat forward; the carinae rather feeble, the space between them 

 almost flat. Mandibles shining, sparsely and coarsely punctured, 

 quadridentate. The scape does not extend back quite as far as the 

 occipital margin. First joint of flagellum as long as the four succeed- 

 ing joints taken together ; 3rd-8th joints a little wider than long. 

 Head almost twice as wide as the pro-mesonotum. Thorax similar to 

 that of Arnoldi, but narrower, and with the meso-epinotal suture 

 deeper. The epinotum is two-thirds as long as the pro-mesonotum. 

 The dorsum of the epinotum not much longer than the declivity, as 

 high as the mesonotum, and very convex. The node of the 1st joint 

 of the petiole is conical and widely rounded above, its length below 

 about one and a quarter times longer than its peduncle, one and two- 

 thirds as long as wide, not much higher than the 2nd node, the 

 anterior face subvertical, the posterior face very oblique. The 2nd 

 node is globose, widest in the middle, barely wider than the 1st. 

 Abdomen oval. 



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



