386 Annals of the South African Museum. 



Head nearly quadrate, eyes set nearer to the insertion of the 

 mandibles than to the posterior margin, the space behind the eyes 

 being long, straight, and the angle quite distinct, the basal margin 

 itself is straight, tubercles large, transverse, third antennal joint 

 three times as long as the second and thickening at tip ; thorax very 

 long, convex on the mesonotum, greatly sloping behind, broadly, 

 deeply, and regularly foveate reticulate, broadest across past the 

 suture of the pronotum, strongly bi-sinuate laterally, and thus 

 bulging in the middle ; between the pro- and the metanotum the 

 latter is strongly sloping, and the lateral margin only slightly serrate ; 

 abdomen sub-sessile, first segment very short at the base, bi-dentate 

 there, then dilated l)ut not as broad as the anterior part of the second 

 segment, strongly carinate underneath, the carina truncate behind in 

 the manner of the S ; all the segments are deeply punctate, the 

 punctures on the second one deeper and more scattered than on the 

 others, the ultimate segment is closely punctate, set with dense 

 greyish hairs, and has no pygidial area. 



Length 9 mm. ; width 3f mm. 



Hab. Natal (Durban), C. N. Barker. 



MuTiLLA (Rhopalomutilla) tongaana, n. sp. 



<? . Black, with the dorsal part of the thorax and the tegulae 

 ferruginous red, abdomen petiolatc, segments with the exception of 

 the first and last having a narrow apical band of a dense sub-flaves- 

 cent white pubescence. Head and thorax clothed with a moderately 

 dense pubescence, greyish white on the anterior part of the head, 

 black on the posterior and the anterior part of the thorax but white 

 on the scutellum and along the metanotum, and almost purely white 

 on the abdomen and legs ; wings entirely light fuscous. 



Head broader than long, and with the vertex produced towards 

 the base in a conical gibbosity set behind tlie ocelli ; broader than 

 the thorax and prolonged behind the eyes which are deeply incised 

 inwardly, posterior margin with the angles obtuse but distinct, and 

 slanting on each side towards the centre ; only one ocellus distinct 

 in the two examples which I have examined ; front and vertex 

 irregularly foveate reticulate ; second antennal joint less than one- 

 third the length of the third ; upper part of thorax from the anterior 

 border of the pronotum to the apex of the scutellum hexagonal and 

 very roughly pitted, suture of pronotum well defined, mesosternum 

 with few median grooves, scutellum greatly developed, in the shape 

 of a broadly truncate cone, briefly carinate transversely at apex, 



