A Monograph of the Formicidae of South Africa. 537 



acute and compressed ; the declivity concave lengthwise, at least 

 three times longer than the dorsum. First segment of petiole with the 

 sides parallel or only feebly convex, almost one and a-half times longer 

 than wide, the dorsal face not excavated, if anything a little convex 

 transversely, with a minute tooth on each side in front of the posterior 

 margin ; node of 2nd segment subglobose, without a trace of a median 

 groove or posterior emargination. 



Livingstone, N. Rhodesia. On the trunks of a tree. This locality 

 is just outside the limits of our region, but it is most probable that 

 the species will be found to occur also on the south side of the 

 Zambesi. (S.A.M., E.M., G.A. colls.) 



C. soitDiDULA, Nylander. 



Act, Soc. Fenn., vol. 3, p. 44, £ , 1849. 



Mayr, Verh. Zool. Bot. Ges. Wien, vol. 5, p. 472, ? , 1855. 



Forel, Mitth. Schweiz. Ent. Ges., vol. 3, p. 308, <?, 1870. 



The type-form of this species is distributed, together with numerous 

 varieties, over the southern Palaearctic region ; it is represented in 

 our region by the following forms : 



Var. eectinota, Forel. (Plate VI, fig. 73.) 



Ann. Soc. Ent. Belg., vol. 57, p. 126, £, 1913. 



5 . 18-21 mm. Pale ochreous-yellow, the head reddish to 

 brownish-ochreous, the 1st segment of the abdomen entirely pale 

 ochreous or sometimes yellowish-brown, the rest of the abdomen pale 

 piceous brown, the extreme apex brownish-yellow. Pilosity yellowish, 

 fine and pointed, oblique and fairly abundant on the abdomen, sparse 

 elsewhere. Pubescence inconspicuous. Shining and nearly entirely 

 smooth. Head quadrate, the sides moderately convex, the posterior 

 margin straight, the posterior angles widely rounded. Mandibles 

 smooth, shining, finely and spai*sely punctured. The scapes fall short 

 of the occipital margin by the length of the eye ; 2nd joint of flagellum 

 as long as wide, 3rd-7th joints much wider than long, club 2- or 

 almost 3-jointed. Frontal area indistinct. Head a little less than 

 one and a-half times wider than the thorax. The latter very short, 

 not quite as long as the head including the closed mandibles. Pro- 

 mesonotum marginate in front and at the sides, the shoulders sharply 

 angular. Pro-mesonotal suture indicated only by the slightly raised 

 anterior margin of the mesonotum; the latter has no distinctly 



