682 Annals of the South African Museum. 



"<J, 13 mm. Head elongate behind and trapezoidally narrowed, 

 without forming a neck. Dull, epinotum and abdomen feebly 

 shining. Mandibles dull. Scale barely emarginate, conical when 

 seen from the side. Dark brownish black ; anterior half of the head, 

 epinotum, scale, abdomen, coxae, femora and flagellum reddish 

 brown. Wings brownish." 



Mombi Eiver, S. Ehodesia, (A. E. V. Zealley) ; Chirinda Forest, 

 S. Rhodesia, (C. F. M. Swynnerton) ; Palm Grove, Victoria Falls. 



A distinctly tropical species, living in moist, hot and shady places. 

 It is not likely to be found south of the Limpopo except in parts 

 of Natal and the region north of that territory, from which, however, 

 it has not yet been recorded. 



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



Sub-genus MYRMOSERICUS, Forel. 

 For characters see table of sab-genera. 



21. In general features this caste resembles that of Myrmoturba. 

 The fundamental sculpture is, however, usually stronger, less super- 

 ficial, consisting of a very fine and close punctate reticulation on the 

 head and thorax, more reticulate and less rugulose than in the sub- 

 genus Myrmophyma. Head and thorax dull, abdomen less shining as 

 a rule than in Myrmophyma. There is always a fairly abundant, or 

 very abundant pubescence on the abdomen, sometimes dense, silky 

 and hiding the sculpture. On the head and thorax the pubescence 

 is less plentiful than on the abdomen, but always much more abundant 

 than in Myrmoturba. The clypeus is usually carinate and lobed ; 

 frontal carinae less divergent than in Myrmoturba. Mandibles with 

 6 or 7 teeth. 



$ minor. Like the 2J. in sculpture and pubescence. The head like 

 that of the $ minor of the sub-genus Myrmoturba, but sometimes very 

 elongate and more or less the shape of a parallelogram. A $ media 

 caste is barely appreciable in our S. African species, except in 

 C. angusticeps Emery. 



$. The head is shaped more or less like that of the £ minor, but the 

 posterior margin is rarely convex as in that caste. Sculpture, pilosity 

 and pubescence as in the 21. . 



cJ. In general like the $$ of Myrmoturba, but the scapes are much 

 longer, and the scale of the petiole is always deeply emarginate above. 

 The abdomen has a long pilosity ; the pubescence is scantier than in 

 the $ and $, never silky or so dense as to hide the chitinous integument. 



