A Monograph of the Formicidae of South Africa. 639 



is more clearly noticeable on the abdomen, in which the spots on 

 the first two segments are of a pale straw-yellow and are sharply 

 defined. The spots are also longer, extending to the apical fourth 

 of the segments. 



The same paler coloration is shown in the § § media and minor. 

 Otherwise this var. does not differ from var. y. 



Matopo Hills, S. Rhodesia. 



(S.A.M., R.M., G.A. colis.). 



Var. f . 



(syn. C. Arnoldinus Forel, Bull. Soc. Vaud. Sc. Nat. vol. 50, p. 251, 1914- 

 and C. maculatus, race melanocnemis Forel, nee Santschi). 



Some of the specimens constituting this variety have been deter- 

 mined by Dr. Forel as melanocnemis Santschi (= var. |3 mihi), but 

 they differ more from that form than they do from Liengmei itself. 

 In the sculpture, shape of the thorax etc. they are like Liengmei, 

 but the colour differs from both that race and melanocnemis as 

 follows. The legs are entirely reddish ochreous, and the abdomen 

 is immaculate in the smaller §§ as well as in the Qj..' The abdomen 

 is dark brown, becoming a shade paler towards the base and apex. 

 The head and thorax are moderately glossy, the anterior half of the 

 head distinctly so. The scape extends beyond the hind margin by 

 nearly one-third of its length. The dorsum of- the epinotum is one- 

 fifth longer than the declivity, their junction being more distinctly 

 angular than in Liengmei. In the ^ minor the thorax is entirely 

 yellowish brown, becoming paler at the sides below. In the Qj. and 

 ^ media, the thorax is black or brownish black above, only the 

 declivity of the epinotum and the lower margins of the sides 

 being paler. 



I consider C. Arnoldinus Forel synonymous with this variety. In 

 the specimens determined by Forel as Arnoldinus the tibiae are, as 

 in the specimens just described, compressed, not cylindrical as stated 

 in ForePs description. The ^ Q minores of the two series are absol- 

 utely indistinguishable, and in the Qj. % the only appreciable differ- 

 ence is that the mesonotum of "Arnoldinus" is slightly wider and 

 less narrowed posteriorly. 



Durban, nesting in rotten and moist logs of wood. 



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



