390 Annals of the South African Museum. 



and prominent. The outline of the clypeus behind is semicircular 

 and indistinct, the anterior margin feebly impressed in the middle. 

 Mandibles oblong, armed with 4 or 5 small and blunt teeth, strongly 

 striato-punctate and dull. The eyes are large, oval, placed behind 

 the middle of the sides and occupying about one-third of the same. 

 The scrobes are deep and oblique, placed outside and below the eyes. 

 Scapes flattened and dilated in the apical half, not extending back 

 beyond the hind margin of the eyes. Flagellum short and thick, all 

 the joints, except the 1st and last, much wider than long. Thoracic- 

 sutures obsolete above, sharply defined at the sides. Thorax narrower 

 than the head, the anterior margin arcuate ; the sides of the pro- 

 notum subparallel. From the posterior end of the pronotum the 

 thorax is gradually narrowed as far as the base of the epinotal teeth. 

 There is a moderately prominent and triangular tooth at the middle 

 of the lateral margins of the mesonotum, and a slightly longer tooth on 

 each side of the base of the epinotum. The sides of the pronotum 

 are denticulate, the denticles varying in size and number, but usually 

 from 7 to 8. The mesosternum on each side has a blunt, short tooth 

 at the lower and anterior angle. The epinotal teeth are flattened, 

 slightly divergent, directed very obliquely upwards and backwards, 

 not quite as long as the interval between their bases, narrowed 

 abruptly at the apical third. Declivity quadrate, wider than long, 

 shallowly concave from above to below. First node of petiole 

 convex transversely, subquadrate, narrower behind ; seen from the 

 side, it has a subvertical anterior face and a longer and oblique 

 posterior-dorsal face. The ventral surface bears a strong tooth, 

 widely truncate and pointing forwards. The 2nd node, hardly wider 

 than the 1st, is wider and higher in front than behind and a little 

 wider than long. Abdomen arcuately emarginate at the base, the 

 sides feebly convex, a little longer than wide. 



I have one specimen of the type of the species taken at Mossamedes 

 and kindly given to me by Dr. Forel. From this example batonga 

 differs by the sculpture of the head and also by the much feebler 

 sculpture of the pronotum, which is a little wider. The denticulations 

 of the lateral margins of the thorax are stronger than in Baumi, i. sp., 

 and the epinotal teeth are shorter, less divergent, and less acute. In 

 all my specimens of batonga the head is wider in front than in the 

 example of the type, not narrower, as stated by Dr. Forel. 



This form cannot be considered as more than a variety. I have 

 given the description in some detail in order to use it as a basis of 

 comparison and to avoid prolixity in the descriptions of the other 

 species. 



