AMERICAN COLEOPTERA. 147 



from Oregon and (?) California. Many specimens have been obtained 

 by Lord Walsingham in a recent visit to Oregon. 



PII.EtfOCERUS, Bonv. 



P. americanus, n. sp. — Oblong, black, feebly shining, very sparsely 

 clothed with short black pubescence. Head densely and coarsely punctured. 

 Thorax wider than long, sides moderately arcuate and gradually narrowed 

 from base to apex, hind angles acute, base bisinuate, median lobe short and 

 slightly emarginate, surface densely and coarsely punctured, Elytra oblong 

 parallel, gradually attenuate at apical third, base slightly narrower than the 

 thorax, surface finely striate, intervals very feebly convex, densely punctulate. 

 Body beneath black, more shining than the upper surface, pro- and meta- 

 sterum coarsely but sparsely punctured, triangle of propleurse mere densely, ab- 

 domen finely punctulate. Length .30 inch; 7.5 mm. 



One specimen from Vancouver, collected by Messrs. J. and H. 

 Matthews. 



Through the kindness of M. de Bonvouloir T have been enabled to 

 study the unique of Ph. subclavatus, Bonv., in his cabinet. Our 

 species differs by its more elongate form and black color. In both the 

 thorax is slightly narrower between the apices of the hind angles. 

 The principal points of difference, however, may be found in the an- 

 tennas. Those of americanus are as follows; first joint moderately 

 stout, scarcely carinate in front, longer than the two following united, 

 second in part hidden by the first and with joints 3, 4, 5 nearly equal 

 in length, joints 6 — 10 one-half the length of the fifth, broader than 

 long and each broader than the preceding, eleventh joint narrower, 

 but longer than the preceding, and oval in form. The antennas of 

 the typical species are as follows : first joint thick, slightly carinate in 

 front, as long as the two following united, second small, in part hidden 

 by the first, third elongate, slightly longer than the two following 

 united, fourth to eighth becoming gradually thicker and submoniliform, 

 ninth and tenth broader and compressed, the terminal narrower and, 

 more elongate and nearly conical, the last three joints forming a loose 

 mass. Generically the two species entirely agree except in the form of 

 the antennae, and as both have been described from unique specimens 

 and apparently of different sexes, it seems better to await the discovery 

 of additional material before adding a new generic name, founded on 

 characters that may be insufficient. 



CARDIOPIIORITS, Esch. 



C. mimeticus, n. sp. — Black, moderately shining, sparsely clothed with 

 yellowish pubescence. Head minutely punctuate, frontal margin slightly re- 

 riexed. Antennae black, nearly as long as head and thorax. Thorax longer 

 than wide, sides very feebly arcuate, hind angles not divergent, disc moder- 



