578 Coleopterological Notices, IV. 



the sides toward base; antennae inserted at the middle, the second 

 funicular joint three-fifths as long- as the first; club abrupt, rather 

 large, very robust, densely pubescent, with the basal joint compos- 

 ing- fully one-half of the mass. Prothorax fully one-third wider 

 than long, the apex tubulate and two-fifths as wide as the base; 

 punctures rather large, deep, circular, close but not in actual con- 

 tact, the smooth impunctate line distinct. Elytra large, quite dis- 

 tinctly wider than the prothorax and about twice as long-, the sides 

 just visibly convergent from the humeri to apical third, then gradu- 

 ally and broadly rounded and strongly convergent, the apex acutely 

 ogival; disk with moderately coarse, abrupt stride, the intervals flat, 

 alternating wide and narrower, the wide intervals, beginning with 

 the first, rather finely, extremely densely punctate, the narrower 

 more coarsely and not so closely so, the punctures all distinct. Pro- 

 sternum in the male with an oval and excessively deep pit between 

 the corneous processes, the latter very robust, somewhat long, 

 gradually arcuate and inclined forward from the base, obtusely 

 acuminate at apex and not quite as long as in bjevirostris ; anterior 

 coxffi separated by about one-third of their own width. Length 

 5.6 mm.; width 2.7 mm. 



Colorado. Cab. LeConte. This interesting species is represented 

 by the unique male type only. 



2 Centrinus laSTirostris Lee. — Proc. Am. Phil. Soc, XV, p. 309. 



Robust, oval, convex, piceous, the integuments moderately shin- 

 ing, somewhat densely clothed with elongate-oval whitish scales on 

 the pronotuni in the middle through basal half and toward the sides, 

 but elsewhere spar-sely covered with fine and darker squamules; on 

 the elytra the white scales are dense on the alternate intervals be- 

 ginning with the first, least conspicuously so on the third, the other 

 intervals more sparsely clothed with slender and darker scales ; 

 under surface densely clothed with large white scales. Beak in the 

 male moderately slender, smooth, only deeply and rugulosely punc- 

 tured at the sides toward base, moderately and evenly arcuate and 

 fully as long as the head and prothorax, the antennas inserted just 

 behind the middle, the second funicular joint nearly three-fourths 

 as long as the first and fully as long as the next two combined ; 

 club small, oval, abrupt, densely pubescent, as long as the preceding- 

 four joints and with its basal joint nearly one-half of the whole. 



