4i 8 MEMOIRS ON THE COLEOPTERA 



rather well separated; abdomen tapering from the base, minutely, 

 closely punctate, more closely toward the segmental bases, the basal 

 part of the first three dorsal plates tumid along the median line, the 

 surface beneath and sometimes above, more or less iridescent; sixth 

 ventral (cf ) with a rounded apical sinus about a third as wide as the 

 apex and four times as wide as deep, the adjacent surface extremely 

 briefly impressed. Length (cf 9 ) 4.2-5.7 mm.; width 0.85-1.1 mm. 

 California (Sta. Clara to Siskiyou Co., and at Lake Tahoe). Van- 

 couver Island Horn. [Quedius prostans Horn] prostans Horn 



Body rather slender, somewhat more parallel than in the preceding, deep 

 shining black in color, the legs and antennae testaceo-piceous; head 

 circular, the very large eyes not quite so prominent or thick as in 

 prostans, though the inner lines similarly converge anteriorly, the 

 intervening space broader; antennae nearly similar; prothorax barely 

 at all wider than the head, slightly elongate, parallel, the sides evenly 

 and moderately rounded throughout the length, the base strongly 

 rounded; series normal, the isolated discal puncture near the sides 

 anteriorly very large; elytra scarcely as long as the prothorax, at base 

 evidently, and at apex much, wider than the latter, the punctures 

 fine and well separated, much less coarse than in prostans; abdomen 

 nearly similar but with the tumidity along the median line on the 

 basal part of the segments obsolescent on the first two plates and 

 feeble on the third and fourth; hind tarsi shorter than in the female 

 of prostans, especially joints 2-4. Length (9 ) 5-5 mm.; width i.i 



mm. Colorado (Boulder Co.) rupimontis n. sp. 



6 Form subparallel, rather convex, shining, red-brown, the legs and 

 antennae more or less concolorous, the latter uniform in color through- 

 out; abdomen blackish, feebly iridescent; elytra paler at the humeri 

 and along the apex, more broadly at the external angles, the head 

 deep black, rounded and very convex, rather wider than long, the 

 front unimpressed; eyes at slightly more than half their length from 

 the base, not prominent but continuing the even curve of the sides; 

 antennae rather thick, extending nearly to the thoracic base, only 

 feebly incrassate, the outer joints about as long as wide, the second 

 barely shorter than the third; prothorax distinctly wider than the 

 head, somewhat wider than long, strongly rounded at base and basal 

 parts of the sides, the latter thence straighter and only feebly con- 

 verging to the apex; tripunctate series distinct, even; elytra not quite 

 as long as wide, as long as the prothorax, at apex fully as wide as the 

 latter, at base somewhat narrower; punctures moderate in size and 

 rather deep, strong and somewhat close; abdomen narrowing apically, 

 the surface even, finely, rather closely and evenly punctate through- 

 out; hind tarsi slender, the first and last joints equal in length, the 

 anterior (cf) not very widely dilated, the last ventral of the same sex 

 with a rounded sinus about four times as wide as deep, a third as 

 wide as the apex, the adjacent surface triangularly and rather deeply 

 impressed. Length (d") 5.1 mm.; width i.i mm. Montana (Mul- 



lan), Wickham orbiceps n. sp. 



Form rather slender, moderately convex, subparallel, similar in coloration 

 to the preceding throughout; head less broad, more oval, fully as long 



