' DINOPRIONUS. 4S 



the middle. Pronotum very strongly raised towards the middle 

 and impressed with a shallow longitudinal groove ; sparsely 

 granulated towards ihe 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 costae, 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, 

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

 and very closely granulate, faintly ])ubesceut : tibiae gradually 

 and slightly widened towards their distal extremity. Fifth 

 ventral segment of the abdomen rounded at the apex in both 

 sexes. 



Length 38-53; breadth lO-l-o mm. 



Hah. Calcutta, Assam : Sibsagor {Athinson) ; Patkai Mts. 

 {Dohertif). 



Genus DINOPRIONUS. 



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



Type, D. cephalotes, Bates. 



Kange. Northern India. 



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

 M-ith sharp toothless inner edges ; eyes emarginate in front, 

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

 Antennte scarcely reach beyond the middle of the elytra; 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 mesosternnm 

 narrow. Last ventral segment of the abdomen deeply emai- 

 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). 



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

 cence and glossy, underside faintly pubescent. Antennaj 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 



