Leconte.j CRYPTOEllYXOHINI. 255 



})rist]es, or spines which are sparsely placed upon the prothorax, and upon 

 the alternate interspaces of the elytra. Length 3.7 mm.; .15 inch. 



A— 1)**. 



The body is elongale-oval, as in the last division, from which this ditfer^^ 

 cliiefly by the protliorax being feebly constricted near tlie tip. 



The beak is more slender towards the tip, and not flattened, about as long as 

 the prothorax and moderately curved; the antenmeare less slender, though 

 tlie second joint of the funicle is as long as the first; the club is oval, an- 

 nulated. Prothorax wider than long, narrowed in front from the base, 

 moderately rounded on the sides, feebly constricted near the tip, with dis- 

 tinct postocular lobes; disc strongly carinate; base truncate each side: 

 middle lobe acute, very distinct: scutellum indistinct. Elytra very little 

 wider than the prothorax at base; humeri rounded, not very prominent : 

 sides subsinuate, then narrowed to the tip; alternate intervals feebly con- 

 vex, with tufts of erect bristles. Thighs sinuate beneath near the tip, 

 armed with two distinct teeth; tibise slightly curved; very distinctly mucro- 

 nate; tarsi as in most of the other species. 



9. O. tristis, n. sp. 



Elongate-oval, densely clothed with dark gray scales, with intermixed 

 sliort erect bristles, which on the elytra are arranged in tufts upon the al- 

 ternate interspaces. Beak more slender at tip, punctured. Prothorax 

 deeply and densely punctured, strongly carinate, formed as above described. 

 Elytra indistinctly variegated on the ground color, tufts of bristles darker. 

 Beneath clothed with dirt colored scales, densely punctured. Length 5 

 mm ; .30 inch. 



>Iiddle and Western States. I have adopted Dejean's name for this 

 species. 



B. 



The species of this division differ from all those above mentioned by the 

 elytra more oblong in form, and by the joints of the funicle of the an- 

 tennse 3-7 being equal in length, and gradually wider: the second joint is 

 either nearly as long as the first {ohlongus), or very distinctly shorter; the 

 club is small, rounded-oval, distinctly annulated. The prothorax is rounded 

 (m the sides, a little wider than long, narrowed in front, ijot strongly con- 

 stricted, with the postocular lobes feeble ; the disc is not 'carinate. Scu- 

 tellum variable ; elytra wider at base than the prothorax, with the humeri 

 rounded, not prominent, sides parallel, then obliquely rounded to the tip: 

 interspaces somewhat convex, nearly equal. Legs slender, thighs armed 

 with a distinct tooth in one species, whicli is obsolete in tlie other; tibia- 

 nearly straight. 

 Second joint of funicle scarcely shorter than first; liody 



mottled with gray and brown scales 10. oblongus. 



Second joint of funicle much shorter than first ; elytra with 



alternate intcrsi)aces tessellated 11. ferratus. 



