162 Coleopterological Notices. 



pieces, the coxje and trochantin by a fine, nearly straight suture which, ante- 

 riorly, becomes a deep groove for the reception of the antennae, and which is 

 the posterior prolongation of deep grooves beneath the eyes. Protliorax fitted 

 to the elytra throughout the width of the latter, with the basal angles acute 

 and slightly produced posteriorly. 



This genus was founded by LeConte upon the Californian repre- 

 sentative T. Crotchii, which is more slender than the present, more 

 finely and much more densely punctate and pubescent, the hairs 

 being somewhat confusedly matted as in Heterocerus. The above 

 diagtiosis was drawn from the Texan species which seems to be 

 identical in generic characters. 



T. politlis n. sp. — Black above ; legs and under surface rufo-piceous ; 

 abdomen paler ; antennae black ; integuments subalutaceous beneath, very 

 highly polished above, rather coarsely and sparsely pubescent ; hairs short, 

 erect, denser and finer on the head. Head moderate in size, deeply seated in 

 the prothorax ; front vertical in repose, feebly, evenly convex, very finely and 

 feebly punctate ; eyes large, rather prominent, entirely exposed, on the sides 

 just before the prothorax •; antennae slightly longer tha'n the width of the head, 

 slender; joints three to five very slender, the third almost as long as the fourth 

 and fifth together. Prothorax widest at the base, where it is two-thirds wider 

 than at apex ; sides evenly, feebly arcuate ; base transverse, rather abruptly 

 and strongly arcuate in the middle third ; posterior angles very acute, slightly 

 produced ; apex broadly, feebly arcuate ; disk nearly twice as wide as long, 

 broadly, very evenly convex, finely, sparsely punctate, the interspaces ex- 

 tremely minutely and feebly punctate. Scutellum very distinct, flat, polished, 

 impiinctate, ogival, pointed, as long as wide. Elytra at base equal in width to 

 the prothorax ; sides parallel, feebly arcuate for two-thirds the length from 

 the base ; together gradually rounded behind, acute at the apex ; disk evenly 

 convex, nearly three times as long as the prothorax, very coarsely and strongly 

 punctate ; punctures impressed, evenly distributed, obsolete at base ; inter- 

 spaces more than twice as wide as the punctiires, not at all punctate. Under 

 surface very finely, densely pubescent, the hairs short and closely recumbent ; 

 abdomen extremely minutely granulose, not punctate ; segments decreasing 

 very slightly in length to the fourth, fifth slightly longer ; surface convex ; 

 sutures feeble, straight. Length 1.7-2.0 mm. 



Texas (Galveston). 



A very good series of this interesting species was obtained from 

 the vegetable detritus, covering the interior line of sand dunes, 

 along the ocean beach. 



