A Monograph of the Formiciclae of South Africa. 199 



the petiole is higher and more distinctly delimited. Otherwise similar, 

 but smaller. The colour is, however, much brighter, yellowish red, and 

 the pilosity is finer and sparser. 



" Okahandja, German S. W. Africa. (Peters.) " 



0. barbiger, Emery. (Plate V, fig. 53.) 

 Boll. Soc. Ent. Ital., vol. 18, p. 364, $, <?, 1886. 



$. 6'5 mm, Very similar to WeitzaecJceri, but the thorax is darker 

 and the abdomen is quite black. The striation of the head at the 

 sides in front is a little stronger, but the direction of the striation is 

 very variable. The clypeus is excised like that of WeitzaecJceri. The 

 petiole resembles that of var. Foreli, but is not quite so strongly striate. 

 The main distinction lies in the shape of the abdomen, which is 

 rounder and with the 1st segment not sub-pedunculate at the base, 

 but convex in its entire outline, when seen from above. 



$ . 5 mm. Differs from WeitzaecJceri in the shape of the head, which 

 is narrower, not wider than long, but even a little longer than wide. 

 The eyes are much smaller ; they are not placed so far forwards, and 

 occupy less than half the sides of the head. The ocelli are also smaller 

 and less raised. The clypeus is very convex in the middle, almost 

 tuberculate. The mesonotum is narrow, finely and longitudinally 

 striate, and separated from the scutellum by a much deeper impression 

 than in WeitzaecJceri. The petiole and abdomen are much more sparsely 

 pilose, and the hairs are shorter and thinner. The posterior femora 

 are laterally compressed, but not sinuate along the basal half. The 

 whole insect is much more shining than WeitzaecJceri. 



Capetown, Orange River, Mahalapye, Bechuanaland. (S.A.M., 

 R.M., GA. colls.) 



0. Picardi, Forel. 



Mitth. Schweiz. Ent. Ges., vol. 10, p. 306, % , 1895. 



" £ . 10-11 mm. Mandibles closely and coarsely striate, quinque- 

 dentate, almost parallel- sided (hardly wider at the masticatory margin 

 than at the base). Clypeus somewhat produced and narrowly and 

 semi-circularly excised in the middle, so as to leave a tooth-like angle 

 on each side of the excision. Head at least as wide as long, wider in 

 front. Eyes situated behind the middle. The scape extends back 

 slightly beyond the occipital margin. Declivity of epinotum steeper 

 than in BobeccJiii, more like that of WeitzaecJceri. First joint of petiole 

 with a long peduncle as in the other species, but the node is more 



