A Monograph of the Formicidae of South Africa. 127 



projection. The abdomen widens gradually towards the apical 

 margin of the 3rd segment, all the segments wider than long. The 

 pygidial area of the 5th segment is dull and only shallowly impressed, 

 forming a more or less oval fovea, not semicircular or bounded by a 

 sharp raised margin, as in the sub-genus Doryhts. By this character, 

 and also by the longer petiole and the frontal carinae without spines, 

 all the workers of this species can be distinguished at a glance from 

 those of the sub-genus Dorylus. 



$ minor. 8-3 mm. In these the colour is much lighter, or more 

 or less reddish yellow. Antennae 11-jointed as in the maxima. 

 Proportionately the head is wider in front than in the £ maxima. 

 The puncturation is finer and the pubescence is more apparent. 

 In the smaller forms the frontal carinae project further forwards 

 and are more convergent posteriorly, or even meet to form a single 

 lamina. The median impression on the head is much shallower 

 and shorter, or almost obsolete. The mandibles are more shining, 

 with three teeth more acute and distinctly defined. 



$ minima. It is probable that there are some of this class, and 

 measuring less than the smallest of the minor class. I do not, how- 

 ever, possess any smaller than 3 mm., nor do I know of any workers 

 of a smaller size of this race having been described by any author. 



$. 33 mm. Thorax 10-2 mm. long x 5-8 mm. wide; petiole 

 2*8 mm. long x 4 mm. wide ; length of front wing, 22 mm. Head 

 in front and above, dark brown, occipital surface of the head, 

 antennae, mandibles and all the legs ferruginous or castaneous red. 

 Thorax, petiole, and abdomen pale yellowish red, the 6th dorsal seg- 

 ment and the margins of all the abdominal segments darker. The 

 thorax is somewhat more yellowish than the abdomen. The anterior 

 part of the head between the anterior ocellus and the clypeus clothed 

 with long, curved, silky yellow hairs ; a tuft of similar hairs on the 

 clypeus and the base of the mandibles. The front of the head 

 is densely clothed with a short brownish-yellow pubescence, the 

 posterior portion, behind the eyes and ocelli, glabrous. The thorax 

 and petiole with a rather long, very dense, decumbent, yellowish 

 or golden pubescence ; the pubescence of the abdomen is much 

 finer, and has a silky sheen, the margins of all the segments with 

 longer hairs, and the 6th segment densely clothed with long silky 

 hairs. The metanotum is sparsely clothed with short stiff hairs ; 

 the brow of the epinotum, the posterior dorsal margin of the petiole, 

 and the space between the ventral lamella and the 1st abdominal 

 segment and all the coxae fringed with long golden hairs. The 

 whole body is sub -opaque and microscopically rugulose, except the 



