Coleopterological Notices. 443 



about two-fifths wider than long, not very coarsely but deeply punctate, the 

 punctures rather elongate, distinctly separated transversely, but tending to 

 coalesce longitudinally ; epistoma broadly sinuate ; upper lobe of eyes mode- 

 rate or rather small, rounded ; antennae moderate, gradually incrassate toward 

 apex, third joint about three-fourths longer than the second, much shorter 

 than the next two together, eleventh as long as wide, truncate, rather dis- 

 tinctly wider than the ninth. Prothorax about three-fourths wider than long ; 

 sides feebly convergent from base to apex, moderately and very evenly arcuate 

 throughout ; base transverse, the lateral sinuations moderately distinct, the 

 basal angles very slightly obtuse, not rounded but not prominent ; apex 

 broadly, evenly emarginate in circular arc ; disk rather densely punctate, the 

 punctures deep, moderate in size, somewhat elongate, not much sparser toward 

 the middle, tending slightly to coalesce longitudinally throughout the disk, 

 but distinctly separated transversely. Scutellum moderate. Elytra rather 

 less than three times as long as, and, behind the middle, a little wider than, 

 the prothorax ; sides distinctly arcuate posteriorly, together evenly rounded 

 at apes ; disk finely striate, the striae feeMy impressed, not appreciably more 

 deeply so toward the sides, fiuely punctured, the punctures feeble and gener- 

 ally separated by from one-half more than to twice their own diameters ; 

 intervals nearly flat, from four to five times as wide as the strial punctures, 

 very finely and sparsely punctured. Abdomen polished, very finely and some- 

 what sparsely punctate, the pubescence rather long, moderately dense and 

 distinct. Leys and tarsi moderate. 



Male. — Anterior tarsi strongly dilated, the basal joint slightly wider than 

 long, narrower than the second and third, the latter equal in width, trans- 

 verse, the apex broadly sinuate toward the middle ; intermediate rather feebly 

 dilated ; both pairs densely spongy-pubescent beneath ; abdomen broadly and 

 more or less feebly impressed in the middle toward base. 



Length 3.8-4.6 mm. ; width 1.6-2.0 mm. 



Washing-ton State; California (Placer Co. and Lake Tahoe); 

 TVyoniinji: (Laramie); Colorado (Teta Pass). 



The specimens from Lake Tahoe are rather smaller and narrower 

 than the others, with the punctuation of the pronotum tending- to 

 become finer and sparser toward the middle, while those from 

 Wyoming have the entire surface of this part almost longitudinally 

 rugulose; the typical forms arc from Washington State. The series 

 before me is very extensive, and the extreme forms do not present 

 aiiv tangible specific characters 



This species somewhat resembles jnilverulentus, but may be 

 distinguished at once by its smaller size, more depressed form and 

 more developed wings. The latter in the present species are rela- 

 tively a little longer tlian in mcedus, and broader, hyaline, about 

 four-fifihs longer than the prothorax and nearly five-sixths as long 

 as the elvtra. 



