NORTH AMERICAN COLEOPTKHA. 267 



22. <'. eloiigafula Crotch.— Oval, slightly ohlong, moderately convex, 

 surface with slight feneous lustre. Antennse rufotestaceous, very slightly darker 

 to the tip. Head distinctly alutaceous, inipunctiite. Thorax nearly twice as 

 wide at hase as long, distinctly narrowed in front, the anterior angles obliquely 

 truncate with a post-apical angulation, sides thence to base regularly arcuate, 

 basal marginal line extremely fine, disc very distinctly alutaceous. the punctures 

 rather coarse and deep, moderately close, but separated by their owu diameters. 

 Elytra very little wider at base than the thorax, the humeri rounded, umbone 

 moderately prominent and smooth, disc with distinctly impressed striae, the 

 punctures relatively fine, seriately placed, the intervals broader than the strife, 

 slightly convex and with a row of extremely fine punctures. Body beneath 

 piceous black, shining. Prosternum coarsely, closely punctate, the side pieces 

 smooth. Abdomen very sparsely punctate, slightly wrinkled transversely. An- 

 terior and middle femora brown, the posterior piceous, tibise and tarsi rufotesta- 

 ceous. Length .06— .08 inch. ; 1.5 — 2 mm. 



This species is not unlike some of the smaller forms of denticnlata. 

 The small number of species in which the thorax is narrowed in 

 front and the anterior angles obliquely truncate renders them easily 

 separable. 



Occurs in Kansas, Colorado and Dakota. 



23. C, dispar n. sp.— Oval, .slightly oblong, surface piceous, moderately 

 shining, with scarcely a trace of bronze lustre. Antennae entirely rufotestaceous. 

 Head finely alutaceous. impuuctate. Thorax twice as wide as long, distinctly 

 narrowed in front, anterior angles obliquely truncate with a post apical angle, 

 the sides thence to base arcuate, basal marginal line fine, but distinct, surface 

 very distinctly alutaceous, the punctures moderately coarse, very closely placed, 

 but not deeply impressed. Elytra not wider at base than the thorax, the margin 

 nearly coutinuous, umbone feeble, disc deeply striate, the striae relatively 

 coarsely, crenately punctured, the intervals convex, narrower than the striae, 

 interstrial punctures not distinct. Body beneath piceous black, shining. Pros- 

 ternum punctate, the side pieces entirely smooth. Anterior and middle femora 

 iirownish testaceous, posterior piceous, paler at tip ; tibiae and tar.si all rufotesta- 

 ceous. Length .06 inch.; 1.5 mm. 



This is one of the smallest species in our fauna. It is readily 

 known among those with truncate thoracic angles by the deep, cren- 

 ately punctured striae. 



Occurs in northern Georgia (Morrison). 



24. C qiiadricollis Schwarz. — Form oval, not very convex, piceous black, 

 with faint aeneous lustre. Antenna^ entirely rufotestaceous Head alutaceous, 

 impunctate. Thorax nearly twice as wide as long, very obliquely truncate at 

 the front angles, the sides behind the angulation nearly straight and slightly 

 convergent to base, the basal marginal line distinct, eutii'e. disc distinctly aluta- 

 ceous, the punctures feebly impressed and not closely placed. Elytra wider at 

 base than the thorax, humeri rounded, umbone moderately prominent and 

 smooth, striae slightly impressed, the punctures moderate in size and closely 



