AMERICAN COLEOPTERA. 273 



C piisillum n. sp. — Form, color and sculpture of putum, of somewhat 

 smaller size and differing only in the sexual characters of the male. 



J/a/e.— Characters otfutum except that the posterior fenaora are without tooth. 



Female. — Unknown. 



There is a specimen from Colorado iu the cabioet of Dr. Leconte, 

 differing from the others in having the sutural stria entire, but it 

 agrees so closely in all else that I prefer to refer it here. It seems 

 to be a female and differs from the male in the absence of anterior 

 tarsal dilatation. 



Maryland, Virginia, District of Columbia and Colorado. 



C clavatuin Mann. — Oblong-oval, equally narrowed at either end, broad- 

 est at the middle of the entire length, piceous or brownish, feebly shining, 

 finely pubescent. Head moderately densely punctured. Antennae slightly 

 passing the middle of the thorax, basal joints rufous, club moderately stout, 

 five-jointed, the terminal obtuse at tip. Thorax about one-fourth wider than 

 long, sides arcuately narrowing to apex, base truncate, hind angles rectangular, 

 surface densely punctulate. Elytra as wide at base as the thorax, sides arcuate 

 and a little broader behind the humeri, sutural stria evanescent near the base, 

 surface not more densely punctured than the thorax but submuricately. Ab- 

 domen moderately densely punctate, metasternum more coarsely but sparsely. 

 Length .10— .12 inch; 2.5—3 mm. 



Male. — Anterior tibiae gradually broader to tip, not sinuate within, the tip 

 truncate, the outer apical angle distinct, sjjurs lobed at the sides, tarsi dilated. 

 Middle tibiaj straight. Posterior tibiae slightly arcuate, the tarsi compressed, 

 decidedly shorter than the tibia. Posterior femur without tooth. 



Female. — Unknown. 



This must be classed among our larger species and is known by the 

 sexual characters and form of body. 



Occurs in Alaska, Vancouver, California, Nevada and Colorado. 



C. inerme Mann. — Oblong-oval, not broader in front, elytra a little wider 

 behind the humeri than the thorax, piceous, feebly shining, finely pubescent. 

 Head rather coarsely, not densely punctate. Antennae attaining the middle of 

 the thorax, paler at base, club four-jointed, the terminal joint obtuse. Thorax 

 about one-fourth wider than long, sides arcuate, gradually narrowing to the 

 front, base truncate, hind angles rectangular, surface moderately shining, 

 densely punctulate. Elytra as wide at base as the thorax, slightly broader 

 behind the humeri, sides feebly arcuate, sutural stria finely impressed, evanes- 

 cent near the base, surface a little less densely punctured than the thorax, 

 the punctuation a little rougher. Body beneath moderately densely punctate. 

 Length .08 inch; 2 mm. 



Male. — Anterior tibia gradually broader, not sinuate within, the outer apical 

 angle distinct, the spurs lobed at the side, the tarsus dilated. Middle and 

 posterior tibiae straight, the tarsi rather slender and but little shorter than the 

 tibia. Posterior femur without tooth. 



Female. — Anterior tibia slender, the spurs slender, the tarsus filiform. Other- 

 wise as in the male. 



Occurs io x\laska, California and Colorado. 



TRANS. AMEH. ENT. SOC. VIII. (35) SEPTEMBER, 1880. 



