182 Annals of the South African Museum. 



GEN. THYEEOPTEEUS, Dej. 

 THYREOPTERUS ANGUSTICOLLIS, n. sp. 



Black on the upperside, with the elytra opaque, the antennae and 

 palpi ferruginous, and the legs and under side piceous-red ; head 

 very elongate, impunctate ; prothorax sub-parallel, slightly wider 

 across the anterior than across the basal part, half again as 

 long as broad, with the margins narrow and very little reflexed, 

 it is shiny, like the head, narrowly impressed longitudinally in 

 the centre, and plainly plicate, on each side of the base there 

 is a fairly deep lateral impression ; elytra broader at the base 

 than the base of the prothorax, rounded at the shoulders, hardly 

 ampliated thence to the posterior rounded angle, strongly sinuate in 

 the posterior margin and with the sutural angle strongly and sharply 

 prolonged, they are plainly punctato-striate with the intervals plane, 

 faintly aciculate and quite opaque ; the last abdominal segment is 

 deeply grooved longitudinally in the middle of the ventral surface, 

 the groove being deeper at the apex, and having a deep depression 

 on each side. 



I have seen one example only of this interesting species, which 

 differs from the other South African species in not having the 

 prothoracic lateral margins strongly reflexed, the prothorax is also 

 very much narrower, eomewhat in the manner of a Dromiid. 



Length 9 mm. ; width 4 mm. 



Hab. Cape Colony (Kentani, Transkei). Eev. F. C. Kolbe. 



THYREOPTERUS LUGUBRINUS, n. sp. 



Black, with the narrow margin of the prothorax, the palpi, the 

 antennae with the exception of the first, second, and third joints 

 which are completely black, the coxae, the median part of the 

 abdomen and metasternum and the tarsi rufescent ; on the elytra 

 there is a narrow, transverse yellowish patch hardly zigzagged, reach- 

 ing from the fourth to the sixth intervals, and a very faint yellowish 

 supra-apical dot situated on the first interval ; the prothorax is 

 slightly narrower in the posterior than in the anterior part, plicate 

 on the sides of the disk and with the normal longitudinal impressed 

 line. 



This species is slightly more elongated than T. flavo-sujnatns, 

 the shape o. the prothorax differs also slightly, and the yellow 

 patches are considerably reduced in size ; on the other hand the 

 examples of Thyreopterus flavo-signatus occurring in the neighbour- 



