A Monograph of the Formicidae of South Africa. 747 



$,13 mm. A larger and more robust insect than schistacea or any 

 of its varieties. Black. Head rather finely and more or less longi- 

 tudinally reticulate-rugose, the sculpture a good deal stronger than 

 in schistacea. Thorax longitudinally rugulose, petiole irregularly 

 rugose and partly reticulate-rugose. Abdomen finely and densely 

 reticulate-rugulose and feebly shining. Head and thorax dull. 

 Pubescence yellowish grey, fairly long, more or less hiding the sculpture 

 on the thorax, much shorter on the abdomen, scapes and legs, least 

 abundant on the head. Pilosity yellowish, a little more plentiful 

 than in schistacea,, especially on the legs. Head one-sixth longer 

 than wide, the sides feebly convex (less convex than in schistacea), 

 as wide in front as behind. Clypeus not transversely impressed 

 behind its anterior margin. Mandibles very finely striate and feebly 

 punctured. Eyes convex, placed at the posterior third. The head 

 is as wide as or wider than the distance between the base of the 

 pronotal spines (narrower in schistacea and its races). The scapes 

 extend beyond the hind margin by half their length. Pronotal 

 spines about twice as long as their width across the base. The lateral 

 margins of the dorsum of the thorax more deeply excised at the sutures 

 than in schistacea, the anterior angles of the meso- and epinotum 

 raised higher, so that the base of the dorsum of the epinotum is 

 rendered slightly concave transversely. Pro-mesonotal suture strongly 

 arcuate. Mesonotum one and three-fourths wider in front than 

 long. Dorsum of epinotum about as long as wide, quadrate, its apical 

 teeth fairly acute, directed upwards, and stronger than in schistacea. 

 Anterior face of the scale almost dorsal in position, the petiole being 

 inclined further backwards than in schistacea ; the inner spines 

 shorter than the anterior face is long, the outer spines about one-third 

 as long as the inner, much longer than in schistacea, and separated 

 from the inner pair by a greater distance, the distance being about 

 equal to half the length of the inner spine. 



(G.A. coll.). 



Schistacea race, schluteri, Forel. (Plate IX, fig. 129). 



Ann. Soc. Ent. Belg., vol. 30, p. 195, & 1886. 



(var. indigens, syn. with type), Bull. Soc. Vaud. Sc. Nat., 

 vol. 50, p. 261, 1914. 



$, 8-5-9 mm. Black ; head and thorax finely reticulate-rugulose, 

 more or less longitudinal on the head, the sculpture much finer than 



