A Monograph of the Formicidae of South Africa. 193 



abdomen black. Thorax shining. Pronotum obliquely rugoso-striate, 

 scutellum and mesonotum longitudinally striate in the middle, 

 obliquely so outside the parapsidal sutures. Metanotum and the 

 narrow dorsum of the epinotum finely rugulose, the declivity very 

 finely reticulate. Sides of meso-, meta-, and epinotum reticulate, the 

 angles of the epinotum coarsely rugose. 2nd joint of petiole above, 

 shining, sparsely but strongly punctured. Pronotum very little 

 exposed in the middle dorsally. Mesonotum longer than wide, pro- 

 mesonotal suture ellipsoidal. Scutellum sloping and rounded behind. 

 Dorsum of epinotum very short in the middle, the declivity almost 

 vertical ; the epinotum is devoid of spines, which are replaced by very 

 blunt angles on each side. 1st joint of petiole with the anterior face 

 more vertical than in the $ , each side with a strong angle in the 

 middle, and above and inwards there is a pair of rather flat tubercles. 

 Second joint with the anterior angles more dilated than in the £ . 

 Abdomen oblong, 1st segment one-quarter longer than the 2nd, all 

 the segments wider than long. Wings brownish yellow, with the 

 cubital and radial cells somewhat darker, nervures brown. Other- 

 wise like the ^ max. 



This genus appears to combine in the head and thorax some of the 

 characters of the genera Cremastogaster and Tetramorium, and the 

 habits of the species described above are decidedly similar to those of 

 the Cremastogastrii. It is a slow ant, living in trees, and. mainly 

 carnivorous in its diet. The nest is usually situated in a hollow stem, 

 some distance above the ground. Like the Cremastogastrii, these ants, 

 when disturbed, exude a whitish and rather sticky secretion from the 

 anal glands. It has not been found by me except in districts contain- 

 ing large trees. 



Sipapoma, Malindi, and Victoria Falls, Rhodesia. Zululand. 

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



Var. australis, Santschi. 



G-oeteborgs K. Vetensk. o. Vitterh. Handl., xv, 2, p. 16, $ , 1914. 



" Differs from the type by the slightly stronger sculpturation of 

 the head. The mesonotum is wider. The epinotal spines are a little 

 shorter, less raised. The spines of the 1st node of the petiole also 

 shorter and thicker ; the 2nd node longer. The colour in the $ 

 minor paler than in the type." Zululand. (Traegaordh.) 



