A Monograph of the Formicidae of South Africa. 411 



barbarus, Linn., race Ltjbberti, Forel. 

 Schultze, Eeise Siid. Afrika, toI. 4, p. 13, $ , 1910. 



" $ . 5-8 mm. Shape like that of race capitahis, but somewhat more 

 robust. Head of the large ^ wider, distinctly wider than long, strongly 

 concave behind. Scape also similar but shorter ; the joints of the 

 flagellum shorter and thicker. Sides of the head straight as in race 

 capensis, Mayr. Thorax as in capensis, but the epinotum is not cuboid 

 but rounded, the dorsum merging into the declivity, with two feeble, 

 elongate and ridge-like tubercles. First node much thinner than in 

 capensis and its var. decipiens, emarginate above, and behind with a 

 longitudinal impression which joins the emargination above. 



" Head closely longitudinally striate as in capensis, but not so 

 deeply, somewhat finer and more shining, not so strongly reticulate- 

 punctate between the striae. The pro-mesonotum is much more finely 

 and closely I'eticulate-rugose, duller, also less angular and evenly 

 rounded. Epinotum transversly striate. Nodes dull, finely reticu- 

 late-punctate. Abdomen shining, finely and shallowly reticulate, 

 with scattered punctures. The upper surface of the body almost 

 glabrous, with only rare bristly hairs. Under surface of the head 

 with some not very long ammochaetae. Legs and scapes with de- 

 cumbent pubescence, much more abundant than in typical barbartis. 

 Eed, the posterior two-thirds of the abdomen dark brown. Antennae 

 and legs reddish-brown. 



" G.S.W.A. (Liibbert) ; Okahandja (Peters)." 



M. denticornis, Forel. 

 Loc. cit., p. 14, £, 2, $ . 



" $ . 55-11 mm. Slender, with a relatively small head (in the 

 largest £ £' 2 - 8 mm. long and wide), but with the typical mandibles 

 of the genus. Mandibles strongly curved, with two stronger teeth in 

 front, indistinctly dentate behind (often quite plane through use), 

 with a very broad terminal margin, fairly closely striate. Anterior 

 margin of clypeus convex. Frontal area very large, rounded behind. 

 Frontal carinae straight, feebly convergent posteriorly. Head some- 

 what longer than wide in the $ min. only, a little wider in front than 

 behind (in the larger £ even wider behind than in front), the sides 

 almost straight, the posterior margin fairly convex in the ^ minor or 

 straight in the $ major, the posterior angles strongly rounded. Eyes 

 distinctly large, convex, placed in about the middle, shorter than their 

 distance from either the front or back of the head. The scape extends 



