8o MEMOIRS ox THE COLEOPTERA 



rufous, the femora often piceous with pale tip; head not large and 

 with the eyes only moderately prominent, three-fourths as wide as 

 the prothorax and distinctly narrower than an elytron; antennae fus- 

 cous, gradually paler basally, the medial joints scarcely three times 

 as long as wide, slightly obconic; prothorax not one-half wider than 

 long, much narrower at base than at apex, the sides strongly rounded 

 anteriorly, more oblique and less rounded behind the middle, mod- 

 erately reflexed; anterior impression fine and distinct, the base mod- 

 erately depressed, the stria very fine between them; foveae rather 

 large, regular, broadly sublinear, the carina distinct; elytra rather 

 shorter, barely one-half longer than wide, parallel, with feebly arcu- 

 ate sides and rapidly rounding humeri; striae fine and feeble, obliter- 

 ated somewhat before the tip; punctures fine, somewhat close; foveae 

 near three-sevenths and four-fifths. Length (cf 9 ) 4.2-4.6 mm.; 

 width 1.4-1.55 mm. Wyoming (Cheyenne), Wickham. Four ex- 

 amples caducum n. sp. 



Form notably slender and more depressed, shining, nearly similar in 

 coloration throughout, the apex of the elytra scarcely at all infumate, 

 the central cloud subsimilar; head subsimilar but fully as wide as an 

 elytron, the antennae nearly similar , prothorax similar but narrower 

 and with the sides more evenly arcuate from apex to the parallel basal 

 part, the obliquity posteriorly being nearly as arcuate as the anterior 

 part of the sides; elytra differing very much in form, more elongate, 

 three-fifths longer than wide, nearly one-half wider than the pro- 

 thorax, parallel, with the sides distinctly arcuate and much less 

 rapidly rounding at the humeri, the apex less obtusely rounded; 

 striae fine, feebly impressed and entire, distinct at apex, the punc- 

 tures fine but more distinct, moderately close; foveae similar. Length 

 (9) 4.2 mm.; width 1.35 mm. Colorado (Montrose elev. 6000 

 ft.) albidipenne n. sp. 



66 Body moderately slender, somewhat convex, shining, the coloration 

 as in the preceding, except that the subcentral cloud on the elytra 

 is very small, nubilous and without lateral extension, the apical mar- 

 gin darker though apparently by diaphaneity, the abdomen dark 

 beneath the tip; head and pronotum pale brown in somewhat imma- 

 ture specimens, the former well developed, with notably prominent 

 eyes, nearly four-fifths as wide as the prothorax and as wide as an 

 elytron; antennae slender, pale, the medial joints fully three times 

 as long as wide; prothorax as in albidipenne, excepting the posterior 

 portions, which are as described; hind angles right and very sharp; 

 elytra parallel, with only very feebly arcuate sides, very rapidly 

 rounded at the humeri, somewhat more than one-half longer than 

 wide and fully one-half wider than the prothorax, gradually sub- 

 evenly rounded in apical third; striae fine, feebly impressed, entire, 

 the fine punctures sometimes visible to the tip; foveaa small, at two 

 and four fifths. Length (d 71 ) 4.0-4.3 mm.; width 1.45-1.5 mm. 

 Utah (Little Salt Lake, Parowan), \Yickham. Four specimens. 



parowanum n. sp. 



Body distinctly narrower, similar in color, except that the submedian 

 cloud on the elytra is larger and tenuously prolonged at its sides, as 



