546 Annals of the South African Museum. 



of epinotum convex at the base lengthwise, its lateral margins also 

 convex, armed with two feebly -pointed tubercles (hardly dentate). 

 First segment of petiole oblong, very little wider in front than behind, 

 nearly one-third longer than wide, slightly concave in front. Node 

 of 2nd segment distinctly narrowed in front, hardly wider than the 

 1st, barely emarginate behind, with a trace of a median longitudinal 

 groove (quite obsolete in some specimens). Abdomen a little longer 

 than wide. 



9 . 8*2 mm. Mandibles and anterior margin of the head dark 

 reddish-brown ; a longitudinal band on each side of the meso- 

 notum brownish, legs reddish-yellow, abdomen dark brown, becoming 

 gradually paler or more reddish . towards the base ; otherwise the 

 colour is like that of the ^ • Sculpture of the head as in the $ , but 

 stronger and more abundantly punctured. Mandibles strongly striate, 

 sparsely punctured in the striae, 5-dentate. Mesonotum and scutellum 

 very smooth and shining, sparsely and sharply punctured. Epinotum 

 dull, transversely rugulose. Petiole and abdomen moderately shining. 



Fig. 54.— C. Welmani, Forel, race retusa, Santschi. Head less enlarged 

 than the other two. 



Head, excluding the mandibles, nearly one-third longer than wide, like 

 that of the ^ in general, but with the posterior angles much more 

 pronounced, and the sides near the eyes very distinctly concave (in 

 the $ there is only a slight trace of this concavity). Eyes placed 

 a little in front of the middle of the sides, feebly convex. Ocelli 

 depressed. The scape hardly reaches the posterior third of the head ; 

 3rd joint of the flagellum wider than long, 4th as wide as long, all the 

 rest longer than wide. The mesonotum slopes downwards from back 

 to front, and is considerably narrowed apically ; it is one-fourth longer 

 than wide across the tegulae. Metanotum produced in the middle, 

 subdentiform. Epinotum unarmed, the dorsum at least four times 

 wider than long, the declivity subvertical. Eirst segment of petiole 

 subtrapezoidal, the sides convex, widest a little in front of the middle. 

 Second node oblongo-ovate, not wider than the 1st, without a median 

 groove or posterior emargination. Wings hyaline, nervures and stigma 

 ochreous. 



$ . 35 mm. Head black, the anterior third reddish-brown, thorax 

 and abdomen brown, the paraptera and metathorax paler than the rest, 



