NORTH AMERICAN COLEOPTERA. 205 



convex, impuuctate; antennae distinctly longer than the head and prothorax 

 together, distinctly incrassate toward the apex; three basal joints elongate, 

 second very slightly shorter than the first or third, four to ten gradually 

 shorter and wider, the former distinctly longer than wide, the latter slighrly 

 wider than long. Prolhorax very slightly longer than wide; sides in the ante- 

 rior third strongly convergent and nearly straight to the nuchal emarginatiou 

 which is broadly and feebly incurvate and one-third as wide as the disk; in 

 the posterior two-thirds the side's are parallel, broadly and feebly incurvate at 

 the posterior third, at the anterior third strongly rounded; disk'transversely 

 and rather strongly convex at the sides, feebly so in the middle, where there 

 is a narrow, rather feeble canaliculalion extending from near the apex to 

 slightly behind the middle; also at the base four foveas, the inner pair 

 continued anteriorly and slightly obliquely nearly to the middle by narrow, 

 deeply impressed canaliculations; the outer pair dilated laterally, and ante- 

 riorly, obliquely and briefly prolonged at their iuner extremities; surface 

 highly polished, finely and sparsely granulose in the middle toward base; 

 basal margin broadly and feebly arcuate; angles right and very narrowly 

 rounded. Elyira at base nearly one-half wider than the pronotum; sides 

 nearly parallel, strongly arcuate toward apex; together subtruncate behind; 

 disk feebly convex, abruptly and strongly so at the sides, impunctate; suturaJ 

 striae fine and distinct; each elytron strongly bifoveate at the base. Abdomen 

 at base three-fourths as wide as the elytra; sides parallel and feebly arcuate; 

 border narrow, deep and strongly inclined; surface feebly convex; first three 

 segments transversely and very strongly impressed at base; impressed areas 

 coarsely, strongly and densely granulose, traversed longitudinally by five 

 carinae, remainder of the surface scarcely punctate on the basal segments, 

 finely, asperately and very sparsely so on the apical. Legs slender; first four 

 joints of the posterior tarsi slightly elongate, nearly equal. Length 2.0 mm. 



California; (Lake Co. 1). Mr. Fuchs. 



The prosternum is well developed in front of the coxae, 

 slightly swollen, connected Avith the supracoxal surface by 

 an even convexity without trace of raised line; between the 

 coxas it is produced back as an acute angle, strongly car- 

 inate in the middle and projecting under the apex of the 

 mesosternum, the posterior edges of the supracoxal surface 

 being narrowly and strongly reflexed; the portion behind 

 the coxc\3 is membranous. 



The mesosternum is ample, broadly arcuate and very nar- 

 rowly reflexed anteriorly, finely carinate throughout along 

 the middle, the surface on either side of the middle being 

 broadly impressed for the reception of the anterior coxae in 



15— EuLL. Cal. Acad. Sci. II. 6. Issued November 27, 1886 



