426 Annals of the South African Museum. 



more steeply downwards in its posterior half. The occipital emargina- 

 tion narrower and deeper, the occipito-f rontal sulcus also deeper. In 

 the middle of the vertex, or just in front of the middle, there is a pit 

 containing the median ocellus, very small but entire ; behind this 

 there are a couple of very shallow depressions, only visible at a certain 

 angle, which are the vestiges of the posterior ocelli. The clypeus has 

 a faint median carina (hardly more than a raised line in punctulata), 

 the pronotum is wider, relative to its length, than in punctulata, and 

 the posterior lateral angles less rounded at the apex, the mesonotum 

 more clearly defined in front. The posterior half of the second joint 

 of the petiole has a few oblique striae above. Otherwise like 

 punctulata. 



$ . 3*2 mm. Like punctulata but darker and a little larger. The 

 sides of the head in front of the eyes are more strongly striated, and 

 the frontal area is larger and more angular behind. The pronotum 

 has a transverse and dark raised line in front, just above the neck ; 



Fig 21.— P. rotundata, Forel. 



this is hardly indicated in punctulata. The epinotum and sides 

 of the mesonotum are more strongly reticulate. Otherwise like 

 punctulata. 



$ . 53 mm. Eyes a little larger and much more convex than in 

 punctulata. The dorsum and declivity of the epinotum form a 

 continuous and oblique curve ; the lateral tubercles or ridges entirely 

 absent. Otherwise not distinguishable from punctulata. 



Chirinda Forest, S.R. (Swynnerton) ; Livingstone, N.R. ; Durban. 

 (S.A.M., E.M., G-.A. colls.) 



Race impressifrons, Wasmann. 



(Race of megacephala.) Notes Leyden Mus., vol. 25, p. 72, 110, 



%, £, 1904. 

 Forel, Deutsch. Ent. Zeitschr. Beiheft,, p. 213, 1913. 



" % . 4 - 5-5 mm. Differs from punctulata in its greater size and 

 more cordate (narrowed in front) head, which is wider and more 

 deeply emarginate, and has a more or less distinct transverse (?) 



