588 Annals of the South African Museum. 



one-third longer than wide, the metanoturn almost obsolete, with no 

 transverse impression between the stigmata and the posterior margin 

 of the mesonotum. The dorsum of the epinotum is less convex and 

 the scale of the petiole is much thicker above. The colour is darker, 

 of a dull reddish brown ; the alternating arrangement of the pubes- 

 cence on the abdomen is barely appreciable. 



9. 13-13 - 2 mm. Colour, sculpture, pilosity and pubescence similar 

 to that of the ^ maxima, but the head and thorax a shade darker, 

 the abdomen almost black. The pubescence of the abdomen is shorter 

 and the pattern less apparent than in the ^ maxima. The pubescence 

 on the epinotum is silvery, not golden. Head a little wider than 

 long, subrectangular, the posterior margin straight, slightly narrowed 

 in front. Mandibles armed with 9 or 10 acute teeth, dull, closely 

 striato-punctate. Anterior margin of the clypeus subangular in the 

 middle. Frontal carinae longer than in the ^ maxima, divergent 

 posteriorly, extending back as far as the level of the middle of the 

 eyes. Frontal sulcus fairly deep, ending at the anterior ocellus. 

 Ocelli not very large. Scape of antenna extending beyond the hind 

 margin by about two fifths of its length. Pronotum slightly exposed 

 above in the middle. Thorax massive, wider than the head. Meso- 

 notum, seen from above, semicircular in outline in front, its anterior 

 half fairly convex transversely, the posterior half flat above; more 

 than one-third wider than long. Scutellum moderately convex trans- 

 versely, wider than long, half as long as the mesonotum. Metanoturn 

 well defined. The dorsum and declivity of the epinotum form a 

 single and steep plane. Scale as in the ^ maxima, but thinner above. 

 Anterior face of the abdomen vertical, its brow rounded. Abdomen 

 very large, quite two-thirds wider than the thorax, subovate, the 

 apex broad, all the segments much wider than long. Wings strongly 

 tinged with ochreous-yellow, the nervures and stigma brown. 



cf. 101 mm. Brownish black, the base and extreme apices of 

 all the femora and tibiae, and the metatarsi brownish-ochreous, the 

 rest of the tarsi and the antennae more or less reddish brown. 

 Pubescence similar to that of the Q, but a little finer and shorter, 

 of a greyish silvery colour except on the mesonotum where it is 

 pale golden. The alternating arrangement of the pubescence on the 

 abdomen less distinct than in the Q. Head subquadrate, as long as 

 wide behind the eyes, parallel-sided and narrower in front of the 

 eyes than behind them, where the sides are convex. Posterior margin 

 feebly concave, almost straight. Eyes convex and projecting beyond 



