2oo MEMOIRS ON THE COLEOPTERA 



punctate at the sides. Length (9 ) 8.4 mm.; width 3.3 mm. Cali- 

 fornia (Valley of Eel River, Humboldt Co.) alutaceus n. sp. 



Elytra always much more elongate, fully one-half longer than wide and 

 relatively less broad, polished in lustre in both sexes, the anterior 



and middle tarsi (cf ) dilated and densely pubescent beneath 9 



9 Body smaller, more slender, convex, black and shining, the under 

 surface rather less deeply black, the abdomen apically, the legs and an- 

 tennae rufous; head fully two-thirds as wide as the prothorax, the 

 eyes very moderate; surface moderately coarsely, deeply, rather 

 sparsely and unevenly punctate, a large central space usually devoid 

 of punctures; antennae rather stout, the basal joint short, cylindric; 

 prothorax two-fifths wider than long, the sides broadly arcuate, 

 feebly convergent and less arcuate to straight basally; base trans- 

 verse, fully as wide as the sinuato-truncate apex, arcuate laterally 

 into and through the obtuse and rounded basal angles; surface 

 rather convex, not modified basally, very finely reflexed at the sides, 

 strongly, sparsely and irregularly punctate, the median stria very 

 fine, unimpressed and subentire; elytra slightly wider than the pro- 

 thorax, parallel, ogival at tip, the sinus extremely feeble, barely 

 traceable; striae fine, the intervals very feebly convex, subuniform in 

 width, the two series of deep moderate punctures rather irregular, 

 more or less widely spaced, the alternate intervals laterally tending 

 to slightly greater convexity and more irregular series, the eighth 

 stria sometimes almost obliterated; abdomen rather strongly and 

 not very sparsely punctate, the sides of the proste.rnum with a 

 mixture of coarser and finer punctures; first three joints of the hind 

 tarsi decreasing uniformly in length, the first much shorter than the 

 fifth. Length (cf 9 ) 7.6-8.8 mm.; width 2.9-3.2 mm. California 

 (San Francisco Bay regions). Moderately abundant. [D. villosns 

 and irregularis Mots, and parallelus Lee.; brunneus Mann, nee Dej.]. 



piceus Menet. 



A Similar to piceus but slightly more slender, the head not quite so 

 large, the pronotum with evident sublinear and moderately im- 

 pressed basal foveae, the elytral punctures finer and forming two 

 almost perfectly even series, although very irregularly spaced in 

 the rows; sides of the prosternum with moderately strong, sparse 

 and uniform punctures. Length (c?) 8.5 mm.; width 3.0 mm. 



Utah rupimontis n. subsp. 



B Similar to piceus but much more slender, with smaller, less coarsely 

 and very irregularly punctate head, the sides of the prothorax 

 posteriorly very feebly sinuate, the obtuse hind angles rather less 

 rounded, the surface with evidently less coarse punctures and 

 more evident traces of broadly and feebly impressed basal foveae; 

 elytral punctures smaller and arranged in two more even seiies, 

 somewhat as in rupimontis; hind tarsi slightly longer and decidedly 

 more slender than in either of the preceding; prosternal punctures 

 somewhat as in piceus. Length (c? 1 ) 8.5 mm.; width 2.8-2.85 mm. 

 California (Trinity River and Redwood Creek, Humboldt Co.). 



angustulus n. subsp. 

 Body larger and much stouter than in piceus or any of its allied forms and 



