A Monograph of the Formicidae of South Africa. 563 



carinate. Pronotum fairly flat above, about two-thirds wider than 

 long in the middle. Meso-metanotum hardly longer than the 

 pronotum ; meso-metanotal suture feeble, the meta-epinotal stronger. 

 Dorsum of epinotum rising from base to apex, the latter distinctly 

 concave transversely between the teeth ; the teeth small, divergent, 

 merely prominent angles, the declivity as long as the dorsum, 

 the stigmata below raised and subangular in profile. Petiole one- 

 fourth longer than the scale is high, the peduncle as long as the 

 scale, the latter inclined forwards, its posterior face convex trans- 

 versely, the dorsal edge straight. Abdomen not very convex above, 

 about one-third longer than wide, broadly ovate. Legs rather 

 short. 



Redbank, S. Rhodesia. On sandy soil ; a few specimens taken on 

 one occasion only, apparently a rare species. (R.M., G.A. colls.) 



V" 

 Race pilosa, var. avunculus, n. v. 



$ . 2 - 3-2'5 mm. Head and thorax ferruginous, petiole and 

 abdomen piceous, the bases of all the segments more or less paler or 

 reddish-brown. First 3 or 4 joints of the flagellum, the scapes, 

 articulations of the legs, anterior tibiae and all the tarsi reddish- 

 ochreous, the rest of the legs and flagellum reddish-brown. Erect 

 pilosity longer and more abundant than in the type of the race. 

 Smooth and very shining. Second and 3rd joints of the flagellum 

 as long as wide, 4th and 5th a little longer than wide. Pronotum 

 more convex transversely than in the type of the race, also narrower 

 or not more than one-third wider than long in the middle. Mesonotum 

 one-fourth wider than long and nearly twice as long as the metanotum 

 (three-fifths wider than long and very little longer than the metanotum 

 in the type of the race). Dorsal edge of scale thinner than in the 

 type of the race, straight or slightly concave. Otherwise like the 

 type of the race. 



Sawmills, Umgusa River, S.R. (R.M., G.A. colls.; type in my 

 collection.) 



A. Arnoldi, Forel. 



Ann. Soc. Ent. Belg., vol. 57, p. 142, $ , 1913. 



$ . l'7-2 mm. Dark reddish-ochreous (deep orange-yellow), the 

 3rd to 5th abdominal segments and the sides of the apical margins of 

 1st and 2nd brownish-black ; the flagellum, excepting the 1st joint, 

 yellowish-brown, becoming darker apically. Apical halves of the 



