26 CERAMBYCIIXE. 



are undoubtedly, as M. Lameere maintains, a primitive group, but 

 have not, in my opinion, any direct or close relationship with the 

 Oaniliarocmmini. The latter I consider to be somewhat second- 

 arily modified forms of true Prionince, and as such I place them 

 here. The group is almost entirely confined to the African region, 

 the only species known to occur outside Africa being a very rare 

 one found near Bombay and also in Ceylon. 



Genus CANTHAROCNEMIS. 



Cant\i&rocnQrnis,Serville,Ann. Soc.Ent. Fr. i, p. 132 (1832) : Lucord. 

 Gen. CoUopt. viii, p. 32 (1869). 



Type, G. spondyloides, Serv., an African species. 



Range. Bombay, Ceylon and Africa. 



In form rather short and robust. Head broad, with the front 

 very short and obliquely sloped, the clypeus transversely depressed, 

 the eyes transverse, scarcely emarginate in front; mandibles 

 strong, sometimes falciform and emarginate at the apex in 

 the male. Antennae robust, variable in length, but generally 

 much shorter than the body in both sexes, 11-jointed ; first joint 

 thick, rather short, slightly curved, thickened towards the end ; 

 joints third to tenth subequal, angulate at the apex, eleventh 

 longer than the tenth. Prothorax transverse, its lateral edges 

 project in an angle at a greater or less distance from the base 

 and converge thence more or less gradually towards the apex. 

 Elytra rather short, convex, rounded at the apex, broader in front 

 than the base of the prothorax. Legs stout, somewhat compressed ; 

 femora a little broader in the middle ; tibiae enlarged at the distal 

 end, with very prominent dentiform outer angle, especially in the 

 anterior two pairs, the external margin of each armed with a 

 variable number of teeth ; tarsi moderately long, with the first 

 joint rather narrow, glabrous underneath at the base and along 

 the middle, third bilobed but with the lobes very short in some 

 of the species. Intercoxal part of prosternum strongly arched 

 in front, sloped posteriorly with its end resting in a depression of 

 the mesosternum ; mesosternal process narrow. 



This genus of Prioninat may be readily distinguished from all 

 others occurring in the Indian region by the exceptional form of 

 the tibiae, which, with their prominent dentiform outer angle and 

 toothed external border, somewhat resemble those of the Lucanidce. 

 Apart, however, from this character and the tendency to a great 

 abbreviation of the antennae, the genus conforms with the normal 

 Prionid type and there appears to be no good reason for 

 regarding it as a particularly aberrant member of the family. 



23. Cantharocnemis downesi, Pasc. Trans. Ent. Soc. (2) iv, p. 236 



(1858). 



Reddish brown, varying to a somewhat darker tint. Head 

 sparingly punctured on the vertex, closely and rugosely on the 



