24 GEO. H. HORN, M. D 



sparsely punctate, usually a little paler in color than above. Mesosternuni 

 coarsely punctured in front, obtusely carinate between the coxsb. Posterior 

 femora sparsely coarsely punctate. Wings feebly developed. Length .22-.30 

 inch ; 5.5-7..5 mm. 



Sexual characters.— The only differences observed in the ten specimens before 

 me are that the males have the anterior tibial spur stouter and more curved, and 

 the upper spur of the middle tibiie is less thau half the length of the lower spur. 



Occurs in Nevada and the extreme north of California. 



A. gentilis n. sp. — Oblong, black, shining. Antenna; brown. Head not 

 tuberculate, granulate punctate at front and sides. Clypeus impressed and emar- 

 ginate at middle, on each side angulate, sides of clypeus arcuate, gense prominent 

 and acute. Thorax broad, convex, narrower at base, sides arcuate, broadest at 

 middle, hind angles broadly rounded, basal marginal line deep, surface with very 

 coarse and deep punctures sparsely and irregularly placed. Elytra oval, a little 

 narrowed at base, humeri slightly dentiform, surface striate, strise not closely 

 punctate, intervals very slightly convex, with few extremely minute punctures. 

 Mesosternum moderately densely jinnctured in front, carinate between the coxpe. 

 Body beneath sparsely punctured, the sides of the abdomen rugulose. Posterior 

 femora smooth, with three or four punctures in a row near the knee. Length 

 .28 inch ; 7 mm. 



Of this species I have seen but one female specimen. It is closely 

 related to nevadensis, and differs from that, in addition to the charac- 

 ters given in the table, in the more prominent and acute gense. 



One specimen, San Francisco, Cal. 



A. cribratus Lee. — Oblong, piceous black or brown, smooth, shining. An- 

 tennai ferruginous. Head not tuberculate, spar.sely punctate and slightly rugose 

 at the sides and in front. Clypeus broadly and feelily emarginate at middle, 

 rounded each side, gense scarcely prominent. Thorax broad, narrowed at base, 

 sides arcuate, hind angles broadly rounded, basal marginal line deep, disc convex 

 with coai'se and deep punctures sparsely and irregularly placed. Elytra oblong 

 oval, slightly narrowed at base, the humeri slightly dentiform, the stri?e. deep, 

 rather coarsely and closely, sometimes crenately punctured, intervals convex, 

 .smooth. Mesosternum in front coarsely closely punctate, between the coxae ob- 

 tusely carinate. Metasternum and abdomen at their .sides coarsely punctured 

 and rugulose. Hind femora sparsely punctate or smooth. Length .18-.28 inch ; 

 4.5-7 mm. 



The only sexual characters observed in the male are a thicker and 

 more arcuate spur to the anterior tibia and the upper spur of the 

 middle tibia is shorter than half the lower. 



Five specimens, California (north) and Oregon. 



To this group should probably be referred the following species : 



Oxyomus carta verinus Mann., Bull. Mosc. 1843, ii, p. 261.— Oblongus, 

 supra nigro-subtus rufo-piceous, clypeo profunde emarginato, thorace anterius 

 dilatato varioloso, elytris puuctato-striatis. Longit. 3 lin. Latit. I'i lin. 



