A Monograph of the Formicidae of South Africa. 645 



wide, its anterior and posterior faces vertical and parallel, widely 

 and deeply emarginate at the summit so as to form two obtuse horns, 

 whose apices are as thick as the base of the scale. Black; mandibles, 

 flagellum and tarsi rusty-red. Wings as in the 9- Otherwise like 

 the 9." 



Basutoland, (Wroughton) ; Reddersburg, 0. F. S. (Brauns). 



(S.A.M., R.M„ G.A. colls.). 



Race Empedocles, Forel. 

 (as var. of Thales) Deutsch. Ent. Zeitsch. Beiheft, p. 224, % $. 1913. 



Q|. 10-13"6 mm. Tarsi and flagellum ferruginous, the legs and 

 scapes dark brown, all the rest black, with the apical margins of the 

 abdominal segments narrowly testaceous. Sculpture, pilosity and 

 pubescence as in Thales, but the head is more distinctly punctured 

 in front of the eyes and below the frontal carinae, and the thorax 

 is slightly less shining. It differs from Thales chiefly in the shape 

 of the head, the concavity of the occiput being much deeper, so that 

 the occipital lobes are more prominent posteriorly. They are strongly 

 angular, only the extreme apex of the angle being rounded off. In 

 the largest Qj. Qj. the head is a little wider than long, more quadrate 

 than in Thales, the sides a little more convex. The scape is shorter 

 than in Thales, not reaching the posterior margin by as much as the 

 length of the 1st joint of the flagellum. The mandibles have 7 teeth, 

 the basal one small, (not 6 as stated by Forel). 



^ media, 8*3 mm. Like the Of, but with the mandibles ferruginous, 

 the tarsi and flagellum of a brighter red than in the Qj.. The head 

 is subquadrate, very little wider behind than in front, the sides fairly 

 convex, the posterior margin straight, the posterior angles widely 

 rounded, not projecting backwards. The scape extends beyond the 

 hind margin. 



§ minor, 6 - 7-7 - 3 mm. Like the g media, but with the head a little 

 narrower, or a trifle longer than wide, the posterior angles more 

 widely rounded. 



Salisbury, S. Rhodesia. (Father O'Neil). M'fongosi, Zululand, 

 (W. E. Jones); Krantz Kloof, Natal, (W. B. Marley); Pretoria (Sir 

 A. Theiler). 



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



