138 Annals of the South African Museum. 



in front a very short tooth, directed obliquely backwards. Very 

 smooth and shining, including the petiole. Metathorax and sides 

 of mesothorax fairly shining and reticulate. Piligerous punctures 

 distinct but scanty. The pilosity is fine, yellowish, rather short and 

 sparse, and nearly everywhere oblique. Of a dirty yellow colour, 

 hardly brownish ; head and thorax rusty yellow or yellowish red. 

 Natal. (Wroughton.) " 



A. rotundatus, Mayr. (Plate IV., fig. 37.) 

 Ann. K.K.N.H. Mus. Wien, vol. 16, p. 1, g , 1901. 

 $ . 2-3-3 "8 mm. Eeddish ochre, the basal segment of the abdo 

 men above in some specimens, a little paler. Smooth, very shining and 

 with a few small punctures on the head, pronotum and abdomen ; 

 mesonotum, epinotum and petiole shallowly and rather unevenly 

 reticulate-punctate and dull, but with a slight gloss on the dorsal 

 surfaces. Fine pubescent hairs absent, except on the flagellum. 

 There is a long, yellowish and rather sparse pilosity on the petiole 

 and abdomen, and also, but less regular and scantier, on the head, 

 scape and thorax. Head, excluding the mandibles, very little 

 longer than wide in the larger examples, and about one-sixth longer 

 than wide in the smaller, as wide behind as in front, widest in the 

 middle, convex above and at the sides, very feebly emarginate 

 posteriorly. The frontal carinae are fused together posteriorly, 

 anteriorly they curve round above the very short clypeus, so 

 as to form a semicircular rim round the antennal sockets. The 

 mandibles are elongate triangular, narrowed at the base, dull, finely 

 punctate-striate except along the masticatory margin, which is 

 smooth and shining, and furnished with about 8 or 9 small teeth, 

 and a large sharp apical tooth. The scapes of the antennae reach 

 back as far as the posterior four-fifths of the head ; lst-3rd joints of 

 the flagellum longer than wide, 4th, 5th, and 6th as wide as long, 

 7th a trifle wider than long, 8th longer than wide, apical joint two 

 and a third times longer than wide. Pro- and mesonotum together 

 rather convex longitudinally ; laterally the thorax is moderately 

 compressed, dorsally depressed between the meso- and epinotum. 

 The dorsum of the epinotum is widest in the middle, and one and 

 three-quarter times as long as wide ; it slopes downwards from the 

 middle to the declivity. The latter is vertical, very short, one-third 

 the length of the dorsum, and feebly margined all round. The 1st 

 joint of the petiole is one-quarter longer than wide, very convex 

 above, but slightly so at the sides ; the 2nd joint, seen from above, 

 is narrower in front than behind, and as wide posteriorly as it is long. 



