8 OEO. H. HORN, M. D. 



This species is evidently closely allied to rnfipalpis Chev. from 

 Mexico. The color is different, but this may be an accident, although 

 I have seen three specimens from different localities taken in different 

 years, all alike. In one specimen before me the transverse carina of 

 the front is slightly distinct, in the other absent. The striae of the 

 elytra are coarsely punctured. 



Occurs in Nevada and Washington Territory. 



THAROPS Cast. 



Form slender, subcylindrical, more or less narrowed posteriorly ; antennae 

 sligMly passing the hind angles of the thorax, flabellate from the fourth joint 

 % ; head moderately convex ; eyes round, entire ; clypeus slightly narrower at 

 base, apex bisinuate ; prothorax a little longer than wide, lateral margin entire ; 

 scutellum oval, truncate at tip ; elytra striate, not entirely covering the abdo- 

 men ; prosternal sutures straight, very nearly parallel with the lateral margin, 

 the ijropleura; not excavate for the antennse ; metasternal episterna very narrow 

 in front, broader posteriorly, the epimera visible ; posterior coxje gradually 

 wider internally, the posterior margin internally, truncate ; legs moderate, tibise 

 slender, tarsi filiform, the first joint as long as the next four, the fourth small 

 and simple ; claws simple. 



This genus forms with Melasis a small group differing from the 

 other members of the Eucneminfe in having the prosternal sutures 

 and lateral margin of the thoraxi parallel, the two genera differing 

 at first sight in the form of the tibiae. 



Two species are known in our fauna. 



Elytra with inconspicuous pubescence rufleornis. 



Elytra with dense silken pubescence forming a distinct design iiubila. 



T. ruficornis Say. — Form subcylindrical, slightly narrower posteriorly, 

 piceous black, elytra variable in color, usually with an elongate, triangular, su- 

 tural. yellowish "space, surface very inconspicuously pubescent ; antennse not- 

 passing the hind angles of the thorax, rufo-ferruginous ; head coarsely and 

 densely punctured, front above the clypeus slightly depressed % ; clypeus nar- 

 rowed at base, not wider than the distance to the eyes ; thorax longer than wide, 

 sides nearly parallel, slightly arcuate near the front angles, hind angles short, 

 not carinate ; disc moderately convex, median line ususally impressed, surface 

 coarsely, moderately densely punctured ; elytra striate, intervals slightly con- 

 vex, moderately densely, roughly punctured ; prothorax beneath rather coarsely, 

 but not densely punctured ; metasternum more densely ; abdomen more finely 

 and densely punctured, last ventral segment acute at tip ; legs rufo-ferruginous. 

 Length .14 - .32 inch ; .3..5 - 8 mm. 



Male. — Antennse rufo-ferruginous, first joint rather robust, second small, 

 partly concealed, third as long as the three following joints, joints four to ten 

 short, each, however, gradually longer and narrower, furnished with a branch 

 as long as the entire antennae, eleventh as long as the branch of the tenth, but 

 stouter ; the middle of the posterior margins of the third and fourth ventral 

 segments slightly elevated in a mucro. 



