A Monograph of the Formicidae of South Africa. 677 



brow of the declivity as a long and almost straight line. Declivity 

 not half as long as the dorsum." 



I refer to this variety some specimens taken at Choaherib, S.W.A., 

 although they are rather lighter in colour. In both the 2J. and y, the 

 head and thorax are of a very dark brownish red, only the anterior 

 margin of the head and the posterior corners being paler. Abdomen 

 black, the apical margins of the segments narrowly testaceous. The 

 2|. differs not inconsiderably from the type of the species in the shape 

 of the head. 



2J., (hitherto undescribed), 15 mm. Sides of the head more convex 

 than in the type of the species, not narrower, or only very slightly 

 narrower in front than behind (from apex to apex of the occipital 

 lobes). The occipital lobes sharply angular (less than a right angle) , 

 and, when seen from above, appearing to be produced backwards, 

 owing to the much deeper emargination of the occipital margin, 

 the depth of the emargination being equal to the length of the eye. 

 The scale is a little thinner above than in the type of the species. 



Rooibank, Walfish Bay, (Schultze) ; Choaherib, S.W.A. (R. W. E. 

 Tucker). 



(S.A.M., R.M., G.A. colls. ; type of 2| in my collection). 



Var. exsanguis, Forel. 

 Loc. oil., p. 28, 2j., & $, <J. 



2L 14-15 mm. Abdomen yellowish brown (raw umber), tarsi and 

 antennae ferruginous, mandibles castaneous red, the rest of the body 

 ochreous, fairly pale, sometimes slightly reddish ochreous. Am- 

 mochaetae also ochreous. Head wider than in the type of the species, 

 one-seventh wider than long, less deeply emarginate behind, much less 

 narrowed in front. Declivity of epinotum less oblique than in the 

 type of the species, and longer. Otherwise like the type of the species. 



y minor, 9-5-10-5 mm. Entirely ochreous, except the apical half of 

 the abdomen which is fuscous ochreous, and the antennae and tarsi 

 which are ferruginous. Head slightly narrower than in the type of 

 the species. 



"$, 15-5-16-5 mm. Like the 2|_, hardly more darkly coloured. 

 Wings not quite hyaline, with a tinge of yellow, nervures brownish 

 yellow, stigma brown. Head rectangular, with almost straight sides 

 and fairly sharp, but by no means elongated, posterior angles. 

 Ammochaetae stronger than in the y, especially on the mandibles. 

 Thorax wider than the head. Scale, in profile, elongate cuneiform, 



