A Monograph of the Formicidae of South Africa. 573 



the brow of the declivity is straight transversely, not concave as in 

 the type-species. This difference is not recognisable in the specimens 

 determined for me as simplex by Dr. Forel. 



11 <$ . 2 mm. Smooth, shining (in capensis there is some sculpture 

 on the thorax, especially on the epinotum). Sparsely hirsute. Scale 

 low. Brownish, the legs paler. Wings fairly clear, with pale 

 nervures and stigma. The mandibles have 4 or 5 minute teeth and 

 are fairly long.'' 



Bulawayo ; Grahainstown (Baines and Cherry). (S.A.M., E.M., 



G.A. colls.) 



1/ 



Bace laevis, Santschi, var. alexis, n. v. 

 (Bace) Ann. Soc. Ent. Belg., vol. 57, p. 312, $ , 1913. 

 Bull. Lab. Zool. Sc. Agr. Portici, vol. 8, p. 378, 1914. 



^ . 2 mm. This differs from race simplex, as follows : 



Entirely smooth and shining, except a slight roughening of the 

 dorsum of the epinotum and the lateral margins of the disc of 

 the mesonotum. Pubescence adjacent, short and very sparse. Pilosity 

 scanty, almost absent from the head and thorax, composed of whitish 

 short and blunt hairs. The scape extends beyond the posterior 

 margin of the head by one-third of its length ; 1st joint of the 

 flagellum as long as the 2nd and 3rd together (shorter in simplex), 

 2nd joint a trifle longer than wide, the 3rd one-fourth longer than 

 Avide. Pronotum convex transversely (a little flattened in simplex), 

 as long as wide, the pro-mesonotal sutm-e distinct. Mesonotum 

 more convex than in simplex, the lateral cones of the epinotum less 

 prominent and a little more acute. The scale of the petiole is more 

 deeply emarginate, almost bidentate at the corners. 



It differs from laevis by the dull and striated mandibles, by the 

 pronotum, which is quite one and a-half times wider than long, by 

 the subdentate scale, and its slightly larger size. From var. minuta, 

 Forel, it differs by the much longer scapes. Colour as in simplex. 



Hillside, Bulawayo. Nesting in the ground. (B.M., G.A. colls. ; 

 type in my collection.) 



Race hirsuta, Santschi, var. elevata, Forel. 



(Race) Voyage d'Alluaud et Jeannel, Formicid., p. 124, £ , 1914. 



(Var.) Bull. Soc. Vaud. Sc. Nat., vol. 50, p. 249, £ , 1914. 



^ . 2 - 8-3'3 mm. Jet black, tibiae In-own, tarsi yellowish-brown, 

 basal half of the scape ochreous. Pilosity long, thin and whitish on 



