NORTH AMERICAN COLEOPTERA. 187 



This species, the most elongate and narrow in our fauna, might be 

 mistaken for a small Prionochset(( opaca. Among our species of this 

 genus it is most closely related to C. luridtpenms, but is longer and dif- 

 ferently colored and punctured. 



One male given me by Mr. Ulke, from the Yukon River, Alaska. 



PTOMAPHAGUS Illig. 



P. fisiis n. sp. — Form Mo7-della-like, color pale brownish, very finely pubes- 

 cent. Head minutely, moderately closely punctate. Thorax nearly twice as wide 

 at base as lonoj, much narrowed in front, sides slightly arcuate, hind angles rect- 

 ansrular, disc moderately convex, very finely and rather closely transversely stri- 

 gose-punctulate. Elytra as wide at base as the thorax^a little more than twice 

 as long as it, sides feebly arcuately narrowing to apex, the apices slightly ob- 

 liquely truncate, sutural stria rather deeply impressed, surface moderately closely 

 and very obliquely strigose. Body beneath finely not closely punctulate. Mid- 

 dle and posterior tibiae fimbriate at tip with short, equal, closely placed spinules. 

 Length 10 inch; 2.5 mm. 



Male. — Posterior femora slightly angulate-dentate at middle, anterior t*rsi 

 dilated. 



This species is closely related to consobrmus and califormcus, having 

 sculpture similar to the former and the color of the latter. In both 

 these species the posterior femora are simple in the male. To this spe- 

 cies belong the Pacific forms referred by me to consobrinns, the insuffi- 

 ciency of material by the absence of males prevented me from considering 

 it distinct. 



Occurs in Arizona and California ("Owen's Valley). 



P. Ulkei n. sp. — Form moderately robust, piceous, clothed with very fine 

 sericeous pubescence. Head minutely punctured. Antennse rather stout, piceous, 

 apical and two basal joints pale. Thorax one-half wider than long, sides poste- 

 riorly scarcely convergent, apical third arcuately narrowing to the front, hind an- 

 gles acute, slightly prolonged, surface very finely and densely strigose, finely pu- 

 bescent. Elytra not wider than the thorax, the sides gradually narrowing to the 

 subtruncate apices, sutural stria deeply impressed, entire, surface extremely finely 

 and very closely obliquely strigose, clothed with fine sericeous pubescence. Body 

 beneath finely, sparsely punctate, abdomen more closely and coarsely punctate. 

 Legs piceous. Tibiae fimbriate at tip with fine, equal, closely placed spinules. 

 Length .15 inch ; .3.75 mm. 



By its character this species is related to californicus and its allies, es- 

 pecially by the dense strigosity to nevadicus. It is, however, larger, 

 more robust, darker in color, and with a thorax longer and less narrowed 

 in front than is usual in our species. 



One female specimen collected in the District of Columbia by Mr. 

 Ulke, whose name I take pleasure in associating with it as an evidence 

 of my appreciation of his industry and acute observation. 



TRANS. AMEB. KNT. 30C. XII. (22) iMARCH, 1885. 



