112 Journal New York Entomological Society. [VoI. viii. 



Antennal club larger, narrow, not darker in color, its first two joints not transverse ; 

 body shorter, the legs and antennns testaceous ; prothorax strongly transverse, 

 more than one-half wider than long, strongly narrowed in basal third or fourth, 

 where the sides are very slightly prominent, thence feebly converging and 

 broadly arcuate to the apex ; disk nut tumid in the middle subbasally, the basal 

 impression very feeble throughout, the punctures fine and moderately close ; ely- 

 tra short, parallel, gradually rounding behind, about three-fifths longer than wide, 

 rather distinctly wider than the prothorax, the punctures very fine and rather 

 close, the pubescence very short but somewhat abundant. Length I.45-I.55 

 mm.; width 0.65 mm. Colorado coloradensis, sp. nov. 



II — Pronotum broadly, or deeply and very obviously, impressed at base 12 



Pronotum not impressed at base, or only with an extremely fine line extending 

 along the basal bead ; pubescence extremely short and moderately dense, the 

 punctuies fine ; sides of the prothorax without trace of sinus behind the middle.. 14 



12 — Sides of the prothorax distinctly sinuate for a short distance behind the middle 

 and prominently rounded at basal third or fourth ; body elongate-oval, moder- 

 ately convex, pale rufo-testaceous throughout, the elytra more flavate, polished, 

 the pubescence very short, sparse and inconspicuous ; antenn;T; moderate, about 

 two-fifihs as long as the body, with the club moderate, the first two joints mod- 

 erately transverse ( (J ), or very short, stouter, with the club joints more trans- 

 verse( 9 ); prothorax moderateh' transverse, strongly narrowed behind the lateral 

 prominences, the apex not distinctly narrower than the base ; disk finely, strongly 

 somewhat closely punctate, the basal impression confined to median half of the 

 width ; elytra two-thirds longer than wide, gradually parabolically rounded to- 

 ward apex, but little wider than the prothorax in either sex, the punctures fine 

 but strong and rather sparse, sometimes inclined to serial arrangement. Length 

 1. 6-1. 9 mm.; width 0.65-0.75 mm. Idaho (Cieur d'Alene). 



stricticoUis, sp. nov. 



Sides of the prothorax without an obvious post-median sinus, rather strongly converg- 

 ing and broadly, almost evenly and strongly arcuate from base to apex ; antennae 

 moderate in length, rather slender, the club not stout ; integuments shining.... I3 



13 — Body narrowly oval, dark rufo-testaceous in color throughout ; prothorax but 

 slightly transverse, strongly, evenly convex, finely but strongly, sparsely punctate, 

 the basal impression wide and strong, coarsely punctate and confined to the me- 

 dian regions ; elytra three-fifths longer than wide, the sides parallel and evenly 

 arcuate, slightly, though obviously, wider than the prothorax, rather narrowly 

 rounded behind, finely and sparsely punctate, the pubescences sparse, moder- 

 ately long and coarse and distinct. Length i. 3-1. 6 mm.; width 0.55-0.65 mm. 

 Colorado lucida, sp. nov. 



Body more broadly oval, equally convex, pale flavo-testaceous throughout ; prothorax 

 nearly one-half wider than long, evenly convex, finely and very sparsely punctate, 

 the basal impression broader and more feeble than in lucida. and stronger in me- 

 dian half or more, subobliterated toward the sides ; elytra short, not more than 

 one-half longer than wide, but little wider than the prothorax, narrowed behind 

 from about the middle, the apex moderately obtuse ; pumctures very fine and 

 sparse, the pubescence short, very sparse and inconspicuous. Length 1.5 mm.; 

 width 0.68 mm. Arizona? luculetlta, sp. nov. 



