272 GEO. H. HORN, M. D. 



C putum n. sp. — Oval, slightly oblong, evidently broader in front, brown- 

 ish or ferruginous, moderately shining, finely pubescent. Head rather coarsely, 

 moderately densely punctured. Antennae pale, attaining the middle of the 

 thorax, club four-jointed, the terminal joint as long as the preceding and 

 obtuse. Thorax one-half wider than long, sides arcuately narrowing to the 

 front, base truncate, hind angles distinct but obtuse, surface moderately shin- 

 ing, finely not densely punctulate. Elytra as wide at base as thorax, sides 

 arcuately narrowing to apex, surface moderately densely submuricately punc- 

 tate, sutural stria gradually evanescent near the base. Abdomen sparsely 

 punctulate. Metasternum sparsely but more coarsely punctate. Length .08 

 inch, nearly ; 2 mm. 



Male. — Anterior tibiae gradually broader to tip, the inner edge slightly sinu- 

 ate, the spur lobed at the sides, the tarsus dilated. Middle and posterior 

 tibiae straight, their tarsi slender, nearly as long as the tibiae and slightly 

 compressed. Posterior femur with a very minute tooth at middle arising from 

 the outer edge. 



Female. — Unknown. 



This species possesses the sexual characters of dentatum, but differs 

 in its outward form and the sculpture of the surface. It however 

 reproduces exactly the superficial characters of pusiUum, but this has 

 no tooth on the femur of the male. 



Pennsylvania and District of Columbia. 



C. magnicolle Mann. — Oval, slightly oblong, more obtuse in front, piceous 

 opaque, finely pubescent. Head rather shining, moderately densely punctulate. 

 Antennae passing a little the middle of the thorax, pale brownish, terminal 

 joint oval at tip, as long as the preceding and somewhat paler, club gradually 

 formed, five-jointed. Thorax large, about one-fourth wider than long, a little 

 broader in front of base, sides arcuate and gradually narrowed to the front, 

 base truncate, hind angles rectangular, surface densely punctulate. Elytra a 

 little narrower than the thorax, gradually narrowed toward apex, sides very 

 feebly arcuate, sutural stria entire, surface not more densely punctured than 

 the thorax but a little more roughly. Abdomen very densely punctulate. 

 Length .10— .12 inch; 2—2.5 mm. (PI. VI, fig. 8). 



Male. — Anterior tibiae gradually broader to tip, the inner margin slightly 

 sinuate, the outer apical angle obliquely truncate, the spurs lobed at the sides, 

 the tarsi rather widely dilated. Middle and posterior tibiae straight, the tarsi 

 slender, slightly compressed and shorter than the tibiae. Posterior femur 

 ■without tooth. 



ii^ema/e.— Unknown. 



This species from its form and size can hardly be mistaken for any 

 other. Smaller specimens have a slight resemblance to davatus, but 

 in these the anterior tibiae of the male are not sinuate within and the 

 outer apical angle not truncate. 



Mannerheim describes the posterior angles of the thorax as obtuse 

 but when a distinct view is obtained they are truly rectangular. 



Occurs at Alaska, Vancouver, Lake Superior, Michigan and 

 Pennsylvania. 



