of the Royal Physical Society. 309 



marginatis, punetato-striatis, carina basali, vix dcnte humerali 

 paratis, et sine carina longitudinal!, ad basin et lateribus 

 papulosis; subtus prosterno truncate-; tibiis anticis triden- 

 tatis, postice quadridenticulatis, subtus transverse corrugatis. 



Long. 15 lin., lat. 4| lin. 



Black, shining, elongate, subcylindric ; head corrugated lon- 

 gitudinally in front, and with two longitudinal frontal foveae, 

 turning off transversely towards the exterior anterior angle; 

 a ridge or projection in front of the eye, and a very slight swell- 

 ing behind the eye encroaching on part of it; mandibles not 

 longer than the thorax ; left mandible with one large subquadrate 

 tooth, right mandible with two ; the upper side with two ridges 

 or keels on the exterior side, and the whole furrowed with strong, 

 oblique corrugations curving inwards; labrum longitudinally 

 corrugated, with three projections or teeth, and a large, deep 

 puncture in the middle of the central projection; mentum 

 corrugated and papillose, a central keel with a longitudinal fovea 

 on each side of it running up the middle of the median tooth ; 

 antennae as in the other species, but rather more slender in 

 proportion, fuscous. Thorax subquadrate ; sides subparallel, only 

 sloping very slightly in, till they reach the marginal tooth (which 

 is scarcely one-fourth from the base), when they turn in directly 

 to the base; in the posterior angles there are a number of 

 faint papillae ; there is a margin all round the thorax continued 

 in front, where it is widest ; the dorsal line, which is distinct, 

 reaches this margin, but does not enter on it. Scutellum 

 situated on peduncle ; smooth ; prescutellar space rugose in the 

 middle, smooth all round. Elytra nearly parallel, subconvex, 

 punctate-striate, interstices impunctate ; a narrow margin sur- 

 rounds the elytra, next to which, both at the base and all round, 

 there is a space covered by papillae ; a row of impressions runs 

 up the middle of these papillae; the margin at the base takes 

 the shape of a keel, ending in a small tooth at the shoulder ; 

 there is no longitudinal keel starting from this and running up 

 the elytra ; there is no appearance of larger impressions upon 

 the striae ; there is some appearance of the papillae spreading 

 themselves in a very faint form near the apex. The under side 

 is not so smooth as the upper ; the segments of the abdomen are 

 very finely granulated ; the prosternum and mesosternum have 

 a number of minute, scattered papillae on their sides, and the 

 back part of the under side of the head is slightly rugose or 

 granular; two distinct punctures occur, one on each side of 

 the middle of the abdominal segments, the last segment having 

 another puncture on the exterior margin ; the first and second 



