282 MEMOIRS ON THE COLEOPTERA 



Pronotum equally but very sparsely and irregularly punctured through- 

 out 4 



3 Form stouter, the elytra barely at all narrower at base than near the 

 middle, black, glabrous, the prothorax sometimes dusky rufous; 

 annulation of the antennae moderately marked; prothorax rather 

 strongly transverse, the lateral tubercle short and very broad though 

 angulate; elytra only about one-half longer than wide, narrowed 

 behind, moderately obtuse at apex, the surface with large irregular 

 anastomosing furrows and coarse sparse punctures, denser and rougher 

 on the inflexed sides basally and all obsolescent apically. Length 

 (cf 9 ) 14.0-18.5 mm.; width 5.8-8.2 mm. Kansas., .annulata Say 

 Form more slender, with relatively smaller anterior parts and more 

 inflated and convex hind body, deeper black throughout, not gla- 

 brous, the elytra with very minute ashy hairs, which are condensed 

 in a broad lateral streak from the middle to the apex, the exposed tip 

 of the last dorsal segment (cf) also densely clothed with ashy 

 pubescence, which becomes very minute and sparser ( 9 ) ; antennae 

 with the ashy annuli very conspicuous; prothorax but little wider 

 than long, the lateral tubercle small, obtusely pointed; elytra inflated 

 medially, more strongly narrowed posteriorly to the still more nar- 

 rowly obtuse apex, distinctly narrower at base than at the middle; 

 surface shining, obtusely corrugated in wavy lines, the punctures 

 large but feeble, sparse, much stronger, dense and asperate on the 

 basal parts of the inflexed flanks; tarsi more slender than in any other 

 species, also shorter than in the preceding. Length (cf 9 ) 13-5-15.5 

 mm.; width 5.8-7.0 mm. Kansas (Hamilton Co.) and Colorado. 



nubecula n. sp. 



A Form, coloration and lustre as in nubecula, the rugae of the elytra 

 more obsolete and the punctures of the inflexed flanks larger and 

 less asperate, the small ashy hairs of the elytra only visible in the 

 depressions in the type, the last dorsal (cf) with the hairs, though 

 dense, much more minute and less conspicuous; antennae ap- 

 parently much more obscurely annulate; last ventral segment (cf ) 

 more broadly sinuate at tip. Length (cf ) 13.8 mm. ; width 6.0 mm. 



Kansas (locality unrecorded) demissa n. subsp. 



4 Body more elongate than in the preceding and forming part properly 

 the following group, deep black, alutaceous, shining, glabrous at 

 the sides and beneath as in all the following species; antennal joints 

 three to six annulate but imperfectly on the fifth and sixth; pro- 

 thorax very nearly as long as wide, subinflated at the sides near the 

 apex and very slightly wider there than at base, the sides feebly and 

 broadly undulated, without trace of tubercle; scutellum broadly tri- 

 angular, very minutely, evenly punctulate and with very fine 

 decumbent hairs; elytra four-fifths longer than wide, evenly oval, 

 convex, the sides slightly prominent basally; surface with a peculiar 

 system of fine and rapidly waving, feeble impressed lines and, to 

 slightly behind the middle, with rather small but deep and perforate 

 sparse punctures, which, on the flanks basally, become very coarse, 

 dense and asperulate; male with the fifth ventral rufescent, broadly 



