54 MEMOIRS ON THE COLEOPTERA 



Body stouter than in the preceding, similar in its deep black polished 

 surface, the anterior parts more greenish; head nearly similar, much 

 narrower than an elytron; antennae black, nearly three-fourths as 

 long as the elytra, the joints similarly elongate; prothorax scarcely 

 a third wider than long, distinctly wider at base than apex, the sides 

 not strongly arcuate anteriorly but more so than in pertinax, and 

 rather more oblique and visibly sinuate in about basal half; stria fine 

 but well impressed, not entire; surface feebly punctulate or rugulose 

 at base, the posterior impression obsolete medially as a rule; foveae 

 linear, moderately deep, the carina very fine and feeble; elytra 

 broader, one-half longer than wide or less, parallel, more sinuate at 

 base, the sides rather rapidly rounding basally, the apex broadly 

 parabolic, not quite one-half wider than the prothorax; punctures 

 more or less distinct in the striae to the extreme apex; foveae near 

 basal third and apical fourth. Length (cf 9 ) 4.2-4.7 mm.; width 

 1 .6-1. 8 mm. Utah (Provo), Wickham. Four examples. 



umbraticola n. sp. 



15 Form rather narrow and elongate, moderately convex, deep black, 

 with feeble subaeneous lustre above; legs black; head fully three- 

 fourths as wide as the prothorax, equal in width to an elytron, the 

 sulci remote and parallel as usual; antennae black, fully three-fourths 

 as long as the elytra, the medial joints not quite three times as long 

 as wide; prothorax somewhat less than one-half wider than long; 

 base barely wider than the apex, the sides well rounded, distinctly 

 oblique behind the middle, becoming slightly sinuate basally, the 

 angles more than right but subprominently sharp; surface smooth, 

 with fine incomplete stria, the moderate posterior impression sub- 

 obsolete medially; foveae finely rugulose, briefly linear medially and 

 rather deep, the carina not very short but fine and feeble; elytra 

 parallel, four-sevenths longer than wide, two-fifths wider than the 

 prothorax, gradually obtusely ogival behind, the'striae well impressed 

 suturally, distinctly punctate, the punctures well separated, obso- 

 lescent near the apex suturally, near apical third laterally, where 

 the striae become very fine and feeble though generally traceable 

 throughout; foveae near two-fifths and before three-fourths. Length 

 (cf 9 ) 3.8-4.0 mm.; width 1.4-1.55 mm. New Mexico (Sta. Fe 

 Canon, Jemez Springs and Las Vegas). Six specimens. Lake 

 Superior, LeConte longulum Lee. 



Form not quite so narrow, elongate-suboval, rather convex, polished, 

 black, the upper surface with feeble cupreous lustre; legs black; head 

 rather small, much narrower than an elytron; antennae black, slen- 

 der, fully three-fourths as long as the elytra, the medial joints three 

 times as long as wide; prothorax differing much in form, parallel, 

 less than a third wider than long, the sides evenly rounded from 

 apex, becoming straight at base, the angles more than right; widest 

 barely before the middle; transverse impressions feeble, the anterior 

 unusually near the apex; foveae rather deep, oblique and sublinear, 

 the carina barely traceable; elytra three-fifths longer than wide, 

 one-half wider than the prothorax, parallel, rounded in apical third, 

 the sides nearly straight, rapidly rounding basally; striae, punctures 



