340 MEMOIRS ON THE COLEOPTERA 



elytra nearly two and one-half times as long as wide, only just 

 visibly cuneiform; last true dorsal segment with an evenly rounded 

 emargination, wider than deep and not occupying the entire apex, 

 the supplementary segment much narrower than in princeps, bilobed, 

 the lobes more prominent and much more narrowly rounded; fifth 

 ventral uniformly clothed throughout; hind femora rather more 

 feebly and much more abruptly and more apically clavate. Length 

 (cT) 14.5 mm.; width 4.5 mm. California (Siskiyou Co.), Koebele. 



vinctus n. sp. 



II Form (cf) moderately broad, dark brown, the vestiture minute, 

 dense, luteo-cinereous; head relatively rather small, the antennae 

 three and three-fourths times as long as the body, slender, the basal 

 joint cylindric, gradually obliquely narrowed at base, the vestiture 

 luteo-cinereous, brown toward the articular apices, the fringe not 

 so compact or uniform as inspectabilis and allies but loosely composed 

 of longer and shorter hairs, denser and more uniform toward the 

 apices of the joints; prothorax scarcely more than one-half wider 

 than long, the slightly reflexed acute spur, projecting from the lateral 

 swellings, at basal two-fifths; surface with very sparse and moderate 

 punctures and a transverse entire ridge near the apex, interrupted 

 only at the middle, also with two narrow dark vittae, very broadly 

 interrupted medially; elytra twice as long as wide, parallel, rounding 

 behind to the rounded sutural angles, the pale brown vestiture 

 with four more or less incomplete series of dark dots, placed on 

 feebly elevated lines, also with a long vitta occupying the flanks 

 from base for two-fifths, then prolonged in a slender streak for some 

 distance and angulate upwardly near basal third, extending obliquely 

 on the disk for a short distance, a longitudinal basal streak at inner 

 third and a long cuneiform anteriorly incised and posteriorly divided 

 spot at inner third behind the middle, all of velvety black; under 

 surface rufous; femora strongly clavate; anterior tarsi moderate, 

 the second joint wider than long; last true dorsal segment broad, 

 bilobed, with a large rounded median sinus. Length (cf ) 19.5 mm.; 

 width 6.2 mm. Pennsylvania nodosus Fabr. 



Form (d*) very much broader, darker and blackish in color, the vestiture 

 similar but more infuscate, the elytral maculation almost similar; 

 head larger; antennae nearly similar but a little less slender, with 

 the cylindric basal joint stouter and more abruptly obliquely nar- 

 rowed at base; prothorax shorter, very much more transverse, twice 

 as wide as long, the lateral plectra nearly similar, the punctures even 

 sparser, the central elongate callus also denuded, differing very 

 much in having four widely separated tubercles in transverse line 

 near the apex instead of a continuous medially interrupted ridge, 

 the fine black vittae similarly only visible near apex and base; elytra 

 much broader, distinctly less than twice as long as wide, the sides 

 rounding behind to a broad transverse and rectilinear truncature 

 at apex, defined externally by an obtuse but distinct angle; under 

 surface rufo-piceous; femora similar, the anterior tarsi larger, more 

 dilated but with the second joint as long as wide; last true dorsal 

 segment nearly similar, except that the sinus is broader and shal- 



