200 GEO. H. HORN, M. I). 



:;. — Frontal carinre converging and uniting at the base of the clypeus, then 



strongly divergent convergent. 



Frontal earinse parallel from the occiput to the margin of the clypeus. 



pugnax. 

 4. — Prosternal strife entire, usually parallel. 



Elytral intervals biseriately punctulate: prosternum smooth. 



Prothorax distinctly wider in front of hind angles; punctures of intervals 



distinct Chevrolati. 



Prothorax gradually narrower from the basal angles: punctures of elytral 



intervals very fine and indistinct nienda.Y. 



Elytral intervals with a single series of punctures. 



Prothorax relatively coarsely punctured; prosternum with a few coarse 



punctures in front »iejunctus. 



Prothorax sj^arsely finely ])unc(ate; prosternum smooth iiarviilns. 



Prosternal strise abbreviated. 



Elytral intervals biseriately punctate; prosternum in front rather coarsely 



punctate sericeus. 



Elytral intervals uniseriately punctate; prosternum almost entirely smontli 

 in front debilis 



[n using the above table in reference to the species in which the ely- 

 tral intervals are uoi- or biseriately punctate, it must be remembered 

 that in the uniseriately punctate species two intervals are confusedly 

 punctulate. the second and the fourth. 



Of the thirteen species enumerated above, six are from the Pacific 

 region and seven from the Atlantic, and from our present knowledge 

 most of the species have a limited distribution. 



T. validus Lee. — Form oblong, rather more obtuse posteriori}', brownish, 

 feebly shining, sparsely, finely pubes<;ent. Front convex, rather coarsely punc- 

 tured, the punctures denser anteriorly, a short carina each side close to the anten- 

 nal fossffi. Thorax gradually narrower in front, the sides feebly arcuate, disc 

 moderately convex, without basal depression, surface coarsely not closely punc- 

 tate, punctures finer near the side, intervals very minutely, sparsely punctate, 

 hind angles not carinate. Elytra a little wider than the thorax, surface striate, 

 strise closely punctate, intervals flat, biseriately punctate, the punctures nearly as 

 coarse as those of the strise. Prosternal striae short, the prosternum smooth pos- 

 teriorly, coarsely punctured in front. Metasternum and abdomen very coarsely 

 and moderately closely punctate. Length .12-. 18 inch ; 3-4.5 mm. 



This species is very nearly of the form of punctutus, but larger, with 

 the surface less coarsely punctured and the prosternal strise more abbre- 

 viated ; the pubescence of the surface is very fine. 



Occurs in California and Nevada. 



T. punctatus Bonv. — Oblong, moderately shining, dark brown, sparsely 

 very finely pubescent. Front coarsely and rather densely punctured. Thorax 

 nearly twice as wide as long, sides rapidly converging to the front, very slightly 

 arcuate near the hind angles, disc moderately convex, distinctly depressed in the 



