204 GEO. H. HORN, U. D. 



T. sejuiictui>i n. sp. — Oblong, very little narrower behind, reddish brown, 

 feebly shining, moderately coarsely pubescent. Head obsoletely punctate, front 

 obtusely bicarinate, the carinse distant and parallel. Thorax less than twice as 

 wide as long, the sides feebly arcuate, gradually narrowed to the front, hind angles 

 not carinate, disc moderately convex, basal region scarcely depressed, surface 

 rather coarsely and closely punctate, the intervals moderately punctulate. Elytra 

 very little narrower posteriorly, striate, striae punctate, intervals flat, the second 

 and fourth biseriately punctulate, the others with a single series of punctures, 

 surface between the punctures very minutely punctulate. Prosternal stria3 deep, 

 gradually evanescent in front and not quite entire, the space between them in 

 front coarsely punctured. Metasternum and abdomen coarsely but sparsely punc- 

 tate. Length .08 inch; 2 mm. 



This species is placed in a series with entire prosternal striae, although 

 they are not quite entire as striae, but continued for a short distance by 

 punctures. The characters of the table will enable it to be distinguished 

 from any with the strite entire, while from sericeus it is known by its 

 smaller size, coarse pubescence and the elytral sculpture. 



Three specimens examined, California, that in my cabinet from the 

 Mojave region. 



T. parvulus Lee. — Ferruginous brown, moderately shining, surface moder- 

 ately densely pubescent. Head sparsely punctate, front very obtusely bicarinate. 

 the carinje distant and parallel. Thorax one and a half times as wide as long, 

 much narrowed anteriorly, sides nearly straight at apical portion, slightly arcuate 

 near the hind angles, the latter prolonged, not carinate; disc moderately convex, 

 slightly depressed at basal region, surface rather finely punctate, the punctures 

 not closely placed. Elytra not wider than the thorax, slightly narrower poste- 

 riorly, finely striate, strise finely punctured, intervals flat, with a single series of 

 fine punctures. Presternum smooth, the strise deep, entire and slightly divergent 

 in front. Metasternum at sides rather coarsely punctured, abdomen sparsely not 

 coarsely punctured. Length .06-. 08 inch ; 1.5-2 mm. 



This is the smallest species known to me in our fauna, and is known 

 by the obliquely impressed eyes, obtusely bicarinate front, and from 

 Chevrolati by the punctuation of the surface. 



The only mention of this species by Dr. LeConte is in the List { Smith- 

 sonian Contributions 1863, vi, No. 140, p. 44) the description has never 

 been published, and the present description will therefore be accepted as 

 part of his posthumous contribution. 



Occurs in California, Mojave and Yuma. 



T. sericeus Lee. — Oblong, brown, feebly shining, surface sparsely and very 

 finely pubescent. Head rather sparsely punctate, front obtusely bicarinate, the 

 carinas distant and parallel. Thorax not twice as wide as long, narrowed in front, 

 sides moderately arcuate, hind angles prolonged and acute, not carinate ; disc 

 moderately convex, slightly depressed at base, surface coarsely and moderately 

 densely punctured at the sides and base, more sparsely and finely at middle. 

 Elytra not wider than the thorax, slightly narrowed posteriorly, surface moderately 



