Horn.] 'j"o [Dec. 19, 



prosternum slightly elevated behind, the middle coxae con- 

 tiguous. 



Occurs in Nebraska, New Mexico and in Eldorado county, 

 California. 



C. leucostictus Burm. 



Black, shining, elytra with whitish spots at the sides. Head sparsely 

 punctate, clypeus subtruncate in front, not wider than the head, angles 

 broadly rounded, anterior margin moderately reflexed, vertex and clypeus 

 nearly continuous in the same plane. Mentum plate flat, smooth and 

 shining form hexagonal, margins, except in front, narrowly reflexed. 

 Thorax broader than long, apex feebly emarginate, base truncate, feebly 

 einarginate at middle, sides subangulate in front of middle, in front of 

 which they are straight, posteriorly arcuate, margin very acute posteriorly 

 and feebly reflexed, anterior angles not prominent, posterior rounded, disc 

 sparsely punctate at middle, a little more densely at the sides. Elytra 

 feebly depressed, disc very vaguely bicostate, surface with small fovese 

 sparsely placed. Pygidium moderately densely punctured. Body beneath 

 shining, sparsely punctured and without pubescence. Legs sub-fossorial. 

 Anterior tibia? bidentate externally, the upper tooth distant from the apical. 

 Middle and posterior tibia? moderately compressed, narrow at base, a 

 moderately strong oblique ridge at middle. Tarsi short, scarcely as long 

 as half the tibia?, slightty compressed, the upper edge, however, broad and 

 flat. Length .52 inch ; 13 nun. PI. iv, rig. 4. 



I have seen but one 9 specimen of this species, which is 

 peculiar by the absence of prominent thoracic angles. The 

 short tarsi cause this species to approach Schaumii and annu- 

 laris in which also the mentum is feebly concave. The tarsi 

 themselves are peculiar in their very flat upper side, so that 

 in transverse section the joints are very distinctly triangular. 



One specimen, Maryland, in the cabinet of Mr. Ulke, who 

 kindly loaned it for study. 



C. Scliaumii Lee. 



Black, subopaque, above with short, black, erect hairs, sparsely placed, 

 beneath with longer hairs. Head moderately densely punctured, clypeus 

 smoother, at middle arcuate, sides oblique. Mentum nearly flat, punc- 

 tured at the sides, posterior margin alone reflexed. Thorax one-half 

 broader than long, a little wider at base than apex, sides regularly arcuate, 

 anterior angles feeblj' prominent, excavated and pubescent on the inner 

 side, posterior angles continuous with the curve of the margin or very 

 slightly excurved, triangular, smooth above and with silken pubescence 

 beneath, disc of thorax slightly convex, densely, coarsely punctured. 

 Elytra slightly flattened on the disc, ;ii sides convex, surface with oblong 

 tbve;e, sparsely placed. Pygidium with coarse shallow punctures. Body 



