12 G. H. HORN, M. D. 



tibia3 bidcntate externally the larger tooth median, one more basal 

 smaller and with the margin near the base crenulate. Prosternal tip 

 spiniforui. Hind femora spinous along the posterior margin. Length 

 .32 inch ; 8 mm. 



The prosternum of this species is distinctly spiniform in well pre- 

 served specimens, but in the type is scarcely less prominent than in 

 terrestn's, etc. Its aspect is that of the species with which it is placed, 

 although the surface is entirely without coating as in the two follow- 

 ing. It may at all times be known irom any of our species by the 

 uniseriate arrangement of the short spinulose hairs of th(! elytral in- 

 tervals. 



Specimens are known to me from Kansas and Illinois. 



This species is evidently closely allied to Eversmanni of Europe. 



T. laf icollis, Lee. Proc. Acad. 1854, p. 213. 



Form nearly that of sefjualis, but very slightly broader. Surface 

 black, shining. Clypeus rounded, head sparsely but moderately 

 coarsely punctured. Thorax more than twice as wide as long, sides 

 moderately arcuate and very feebly sinuate near the hind angles which 

 are rectangular, surface shining, coar.sely punctured, dorsal sulcus ob- 

 literated except a feeble ante-scutellar impression. Elytra black, 

 shining, punctato-striate, intervals equal, nearly flat, with slight ine- 

 qualities not amounting to tubercles, each bearing two or three short, 

 erect brownish spiculae placed in a transverse row. Prosternal tip 

 feebly convex. Hind tarsi moderately long. Anterior tibiae feebly 

 tridenticulate on the outer edge. Length .2(i inch; 6.5 mm. 



The slight inequalities which, in this species, replace the elytral 

 tubercles of others appear to be rather transverse folds and are moder- 

 ately distantly placed. The appearance of this species is totally unlike 

 anything in our fauna. 



One specimen, New York. 



T. striatii^i, Mels. Proc. Acad. 1846, p. 1.S7; Lee. Proc. Acad. 1854, p. 213. 



Black, shining. Sides of thorax feebly arcuate, pisteriorly not 

 sinuate, hind angles rectangular; disc moderately densely punctured, 

 median sulcus obsolete. Elytra black, shining, deeply striate, striae 

 coarsely and moderately closely punctured, intervals convex and with 

 fine punctures placed in pairs, which bear very short pale setae. Hind 

 tarsi rather short. Anterior tibia) finely bidenticulate externally and 

 serrulate at base, apical angular to(jth deeply emarginate. Tip of 

 prosternuni in form of a short carina. Length .24 inch; mm. 



One specimen, Pennnsylvania. 



