1-34 AMERICAN COLEOPTERA 



finer: all finer apically as usual. Beneath sparsely, finely punctate; middle 

 <-oxa- distant fully one-third the eoxal width; metasternum distinctly shorter 

 than the first ventral segment. Last ventral unimpressed in both sexes, a little 

 longer in the female, in which it is but little shorter than the two preceding seg- 

 ments united. (PI. IV, fig. 43). 



Male. — Front and middle tibiae a little sinuate, and mucronate within at tip. 



Female. — Tibiae simple. 



Length 1.6 mm. 



Huh. — Two examples only have been seen, a male collected by 

 Hubbard at Lake Tahoe, Cal., and a female in the Horn collection 

 from Western Nevada — very probably also from the immediate 

 vicinity of the same lake. 



The metasternum is shorter than in any other known species in 

 our fauna, and this, with the subobsolete humeri and the (appar- 

 ently) connate elytra, indicate that it is nearly, if not completely, 

 apterous. 



C. plsiiiiilsi sp. nov. — Elongate, depressed, shining, piceous or rufopiceous, 

 legs and antennae a little paler; pubescence dark, short, moderately inclined, 

 though less so than in the following species. Head sparsely punctate; eyes large, 

 prominent; tempora very short hut evident; antennae scarcely reaching the hind 

 angles of the prothorax, joints 7-10 usually nearly or quite as wide as long, the 

 proportions varying slightly in different individuals. Prothorax cordate, slightly 

 wider than the head, three-fourths as long as wide, sides rather strongly rounded 

 in front, convergent behind ; margins finely serrulate; surface more strongly and 

 closely punctate than the head, the punctures varying from somewhat less to 

 rather more than their own diameters apart; hasal fovea large and deep. Elytra 

 elongate-ohlong, one-fourth wider than the prothorax, sides parallel and feebly 

 rounded ; humeri prominent and narrowly rounded, apex obtusely rounded ; 

 strire feebly impressed, rather finely punctate, intervals more finely uniseriately 

 punctate. Prosternum quite strongly punctate; metasternum finely punctate at 

 sides, more sparsely so at middle; ventral segments all very finely, sparsely 

 punctulate. Prosternum fully twice as long before the coxa? as the coxal length ; 

 middle coxae separated by nearly their own diameters. Metasternum longer than 

 the first ventral along the median line, and consequently much longer at sides 

 than the post-coxal portion of the segment. Legs slender. (PI. V, fig. 44). 



Male. — All the tibiae rather feebly sinuate and mucronate internally at tip; 

 fifth ventral short, impresso-emarginate at apex. 



Female.— Tibise simple; fifth ventral longer, not impressed, the apex broadly 

 suhangulate. 



Length 2-2.2 mm. 



Hab. — California (Pasadena, Pomona, Ojai Valley); Colorado 

 (Lead vide, 10000-11000 ft,— Wickham) ; Montana (Assinniboine 

 and Bear Paw Mt. — Hubbard). 



This species is certainly one of the most singular and easily 

 recognized in our fauna. It is more strongly depressed than any 

 other, and the dark suberect pubescence, the very long prosternum 



