336 Transactions Sotcth African Philosophical Society, [vol. xii. 



the two teeth are apart and the space between them is not excavate 

 and is quite smooth Hke the whole anterior sloping part which has a 

 distinct but not deep impression on the outer side of the median 

 dorsal tooth ; the elytra are as in C. vitulus, but the eighth stria is 

 carinate from the base to nearly the median part. 



Female : Scarcely to be distinguished from that of G. tricornutus 

 or of C. vitulus, except that the head is a little more broadly circular 

 and the cephalic, as well as the median emarginate prothoracic 

 carinse are a little more developed, but the fig. 24« of plate xxxviii. 

 gives a very good idea of what the head and prothorax of the 

 females of these three species are like. 



Length 28-30 mm ; width 17-18 mm. 



Hah. Southern Ehodesia (Enkeldoorn), Transvaal (no exact 

 locality). 



Cathaesius melancholicus, Bohem., 

 Plate XXXIII., figs. 21, 21a, 22, 22a. 

 Ofvers. Vet. Akad. Forh., 1860, p. 110. 

 ? C. imnclion, Har. Mitt. d. Munch. Ent. Yer., 1877, p. 97. 



Black, nearly opaque on the head and prothorax, elytra duller 

 black. 



Male : Clypeus produced in the anterior part into two long 

 triangular horizontal teeth, genge wider laterally than the clypeus, 

 anterior and lateral part covered with short, closely set folds, in the 

 posterior part of the head there is fiat laminiform process directed 

 backwards, about 4 mm. broad for half the length, and attenuated 

 there into an erect, cylindriform process hardly 1 mm. wide and 

 3 mm. long ; prothorax deeply excavated triangularly in the centre 

 for the reception of the cephalic process, and sharply aculeate on 

 each side of the tip of the excavation, the anterior sides slope 

 abruptly, the lateral impression is in a line with the sharp edge of 

 the excavation, and the whole surface, including the excavation, is 

 minutely and very closely granulate, the anterior angles are sharply 

 aculeate, and there is in the posterior part of the disk a median, 

 longitudinal impressed line ; the elytra are convex, but not sub- 

 gibbose, they are finely striate, with the striae punctulate, and the 

 intervals finely and closely but not deeply punctulate ; the supra- 

 marginal carina reaches to only one-third of the length. 



In the intermediate development the long cephalic process is 

 replaced by a short, transverse carina 2 or 2^ mm. high, and sur- 

 mounted by a short, cylindriform process of about IJ or 1^ mm., 



