A Monograph of the Formicidae of Sotith Africa. 565 



scale is high ; the latter thin, inclined forwards, distinctly emarginate 

 above. Abdomen longer than wide. 



Sipapoma, S. Rhodesia. Running about on very hot sandy soil. 

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



Var. impressa, n. v. 



$. T7-2 - 2 mm. Apart from its more robust form and larger 

 size, this differs from the type ftf the species as follows : 



The colour is similar but darker in all parts. The thorax is wider, 

 the mesonotum more convex transversely and the meta-epinotal suture 

 deeper. The metanotum is not more than two-thirds the length of 

 the mesonotum (quite as long in the type-species) and its stigmata 

 are more prominent. 



Hillside, Bulawayo ; in similar situations as the type-species. 

 (S.A.M., R.M., Gr.A. colls. ; type in my collection.) 



Var. convexa, n. v. v 



^ . T8 mm. Colour and sculpture as in impressa. The pube- 

 scence is longer and much more apparent than in that variety or in 

 the type of the species. It differs from both by the narrower thorax, 

 the pronotum more convex transversely ; the dorsum of the epinotum 

 is straight between the tubercles, not concave as in the type and 

 var. impressa, and the tubercles are even smaller than in the type. 

 The chief distinction lies in the shape of the scale of the petiole, which 

 is thinner, much narrower and more convex above. 



Hillside, Bulawayo. Type in my collection. 



A. crinita, Mayr. 



Ann. K.K.N.H. Mus. Wien, vol. 10, p. 149, £ , 1895. 



" ty . 24 mm. Black, the apical half of the mandibles, the antennae 

 (excepting the apical fourth of the scape and the apical half of the 

 fiagellum), and the tarsi more or less bright i*eddish-brown or 

 brownish-yellow. The whole body is abundantly clothed with long, 

 whitish, exserted and not very thick, bristly hairs, the femora and 

 tibiae with similar hairs, but only moderately long. A decumbent 

 pubescence is not recognisable. Head, pronotum and mesonotum 

 shining and nearly smooth, or partly and very superficially coriaceous 

 and rugulose, the metanotum and sides of the mesonotum coarsely 

 and longitudinally striate ; the whole epinotum coarsely rugose and 

 fairly dull ; petiole and abdomen smooth and shining. The body is 



