REVISION OF TENEBRIONID SUBFAMILY CONIONTIN^E 139 



sternum shining medially, with strong and moderately separated 

 punctures, the process only moderate in width, rounded at tip, 

 moderately constricted ; abdomen unusually strongly and closely 

 punctate, the hind femora more sparsely. Length 10.2-1 1 .o mm. ; 

 width 5.2-5.6 mm. Montana (Bitter Root Mts.)...acerba n. sp. 



Form more oval and convex, polished, deep black, the punctures pos- 

 teriorly with very small silvery setae ; head rather finely but 

 strongly, not very closely punctate, the sinus moderately narrow, 

 deep and subangulate, the lobes much less broadly rounded, even, 

 the anterior canthus broadly rounded ; prothorax from less to more 

 than four-fifths wider than long, in outline nearly as in acerba 

 throughout, the base similar ; surface finely though rather strongly, 

 not very sparsely punctate, gradually coarsely and much more 

 closely so laterally, the bead moderately fine, straight to the base ; 

 scutellum rather small, transversely and obtusely triangular ; elytra 

 nearly as in acerba but rather more gradually and acutely angu- 

 late at tip, the sides parallel and very feebly arcuate ; surface 

 slightly uneven, rugose behind, the punctures strong though not 

 very coarse, closer and coarse posteriorly ; prosternum shining 

 though strongly and densely punctured, the process less closely 

 so, moderately broad, rounded behind and distinctly constricted ; 

 hind femora and abdomen finely and strongly punctured, the latter 

 more closely. Length 9.010.5 mm. ; width 4.45.5 mm. Col- 

 orado (Boulder Co.), Mrs. F. Y. Parker anita n. sp. 



12 Body stout, convex, oblong-oval, dull and alutaceous, deep black, 



the elytral punctures with minute silvery setae ; head finely but 

 strongly, moderately closely punctate, the sinus moderately nar- 

 row, deep and bluntly angulate, the lobes rounded and feebly im- 

 pressed, the anterior canthus narrowly rounded, much more 

 prominent than the posterior ; prothorax three-fourths wider than 

 long, the sides rounded and converging anteriorly, less arcuate and 

 more or less nearly parallel toward base, the apex deeply sinuate, 

 two-thirds as wide as the base, the angles not much deflexed and 

 well rounded ; base broadly, feebly sinuate toward the sides ; sur- 

 face finely, rather sparsely punctate, with a more or less evident 

 impunctate line, becoming strongly and closely but not very 

 coarsely so laterally, the bead fine, straight to the base ; scutellum 

 small ; elytra parallel, one-half longer than wide to a little less, 

 angulate in apical two-fifths ; surface nearly smooth, strongly but 

 not very coarsely, rather closely punctate, strongly rugose and 

 coarsely, closely punctured posteriorly; prosternum strongly, 

 densely and submuricately punctate, the process nearly smooth 

 and very sparsely, simply punctate, broadly rounded, strongly 

 constricted ; hind femora and abdomen strongly and moderately, 

 equally sparsely punctate. Length 8.8-10.7 mm - 5 width 4.7-5.1 

 mm. Nevada (Reno). A moderate series taken by the writer 

 along the Truckee River , alutacea Csy. 



13 Body narrower, oblong-oval, convex, deep black and alutaceous, 



