634 Annals of the South African Museum. 



me that sexpunctatus is no more than a race of maculatus and fairly 

 closely related to race Liengmei. It is a significant fact that the 

 latter was originally described by Dr. Forel as a variety of sexpunc- 

 tatus. The hind part of the head in the § minor of sexpunctatus 

 is certainly more straight-sided than in Liengmei, but like that race, 

 it has a distinct posterior margin, quite unlike the typical structure 

 of Dinomyrmex, e. g. longipes Gerst. It is also only with some hesi- 

 tation that I have decided to retain Liengmei in the subspecific 

 rank to which it is now assigned by Forel. Apart from colour 

 differences, there is little to distinguish the two forms, but the 

 varieties Hansingi and importunoides appear to stand closer to Lieng- 

 mei than to sexpunctatus. (This race is in fact race probativus of 

 C. compressus F. See appendix). 



Qj.. 16-18 mm. Black, flagellum, coxae, trochanters, basal half or 

 more of the femora dull reddish-ochreous, petiole dark yellowish 

 brown. Abdomen with a small, dull ochreous, subtriangular and 

 rather diffuse spot on each side of the first three segments, placed 

 near the basal margin and not extending as far as the middle of 

 the segment; those on the 3rd segment very dark and almost obso- 

 lete. Sides of the head below the eyes nitidulous, abdomen mode- 

 rately shining, the rest of the body dull. Sculpture like that of 

 maculatus i. sp. but a little stronger, and with the sides of the head 

 finely, but quite distinctly and sparsely punctured. Pilosity brownish 

 red, absent from the legs, very sparse on the head. 



Head as long as wide, the sides less convex than in the type 

 species, the posterior margin not deeply emarginate, its middle third 

 almost straight. Scapes relatively much longer than in the type 

 species, extending beyond the hind margin by almost one-third of 

 their length. Mesonotum more convex in all directions. Convexity 

 of thorax L = 3i H. Declivity of epinotum oblique, much shorter 

 than in the type species, two-fifths as long as the dorsum and mer- 

 ging gradually into the latter. Scale of petiole much more convex 

 above in front, the lower third of the anterior, and the whole of 

 the posterior face vertical. The scale is about as thick below as wide 

 above. Tibiae strongly compressed, the dorsal and inner and outer 

 faces canaliculate, the lower edge with a row of very short setae. 



Q minor, 10 - 5-12 mm. Head castaneous red or brown, thorax 

 more or less ferruginous, (burnt sienna), femora reddish ochreous and 

 becoming darker towards their apices, tibiae and tarsi reddish brown, 

 abdomen a little paler than in the Qj., with the ochreous spots paler 

 and larger, especially on the 1st segment. Head four-sevenths longer 



