DINOPBIONUS. 43 



the middle. Pronotura very strongly raised towards the middle 

 and impressed with a shallow longitudinal groove ; sparsely 

 granulated towards the sides and down the middle, but closely 

 granulated on the raised parts at each side of the same. Elytra 

 rounded at the apex, armed at the suture with a short spine ; 

 each with two strongly raised dorsal costse, the inner one extends 

 from the base for about two-thirds of its length, the outer one is 

 continued to within a short distance of the apex and at its hinder 

 end is directed towards the suture : the lateral costa very short, 

 distinct only on the apical half of the elytron. Legs finely 

 and very closely granulate, faintly pubescent : tibiae gradually 

 and slightly widened towards their distal extremity. Fifth 

 ventral segment of the abdomen rounded at the apex in both 



Length 38-53 ; breadth 10-15 mm. 



Hob. Calcutta, Assam : Sibsagor (Atkinson) ; Patkai Mts. 

 (Doherty). 



Genus DINOPRIONUS. 



Dinoprionus, Bates, Ent. Mo. May. xii, p. 49 (1875). 



Type, D. cephalotes, Bates. 



Range. Northern India. 



c? . Head large, elongated behind the eyes ; mandibles oblique, 

 with sharp toothless inner edges ; eyes emarginate in front, 

 upper lobes narrow, lower lobes distant from base of mandibles. 

 Antennae scarcely reach beyond the middle of the elvtra; first joint 

 short and stout ; third thickened and asperate, twice as long as 

 the first. Prothorax transverse, strongly bisinuate at the base, 

 its lateral edge distinct and prominent from the base to the 

 outer angle of the coxal cavity, thence to the apex nearly 

 obsolete. Elytra with four distinct but not very strongly raised 

 costae on each ; rounded and unarmed at the apex. Intercoxal 

 part of prosternum strongly arched ; that of the mesosternum 

 narrow. Last ventral segment of the abdomen deeply emar- 

 ginate behind. Tarsi narrow, with the first joint but little 

 longer than the second ; lobes of the third joint short and 

 narrow ; claw-joint twice as long as the first three joints 

 united. 



37. Dinoprionus cephalotes, Bates, Ent. Mo. Mag. xii, p. 50 (1875). 



tf . Chestnut-red, the elytra fulvous ; upper side bare of pubes- 

 cence and glossy, underside faintly pubescent. Antenna dark 

 brown at the base, first joint coarsely punctured and asperate, 

 marked with a longitudinal groove in front ; third joint asperate, 

 slightly knobbed at the apex ; fourth slightly thickened and 

 asperate, not longer than the fifth. Pronotum sparsely and 

 finely punctured in the middle, somewhat more coarsely towards 



