NORTH AMERICAN COLEOPTERA. 15 



apex ; the last joint of the anterior tarsi in the Eastern species is 

 much longer than in the Western representative. From the depth 

 of color seen in the antennae, the supposition that the specimen from 

 which the description is taken is immature seems untenable. 



BEItlBIDIlJM. 



B. TinilllllllU n. sp. — Form rather slender, stib-depressed. Head 

 moderate, as wide as long ; eyes large, prominent ; supra-orbital elevations 

 distinct and well-developed ; anterior supra-orbital seta opposite a point of 

 the eye two-fifths the length of the latter from the anterior extremity, poste- 

 rior seta much smaller, and situated opposite a point one-fourth the length 

 from the posterior limit ; interocular surface feebly convex, highly polished, 

 brilliant metallic golden-aeneous in color ; labrum more than twice as wide 

 as long, apical angles acute, front nearly transversely truncate ; third joint 

 of antennae as long as the first ; emargination of mentum very broad and 

 shallow, tooth very stout, acute, and slightly longer than the depth of the 

 emargination ; dental setae strong, situated on the base of the tooth ; there 

 are two setae transversely arranged near each basal angle of the submentum, 

 also a smaller seta at each anterior angle. Prothorax widest at slightly 

 more than one-third its length from the apex, where it is slightly wider than 

 long; sides strongly and evenly arcuate anteriorly, very feebly sinuate just 

 before the basal angles ; the latter acute, anterior angles broadly rounded ; 

 base and apex nearly transverse, the former just perceptibly shorter than 

 the latter ; disk rather strongly and very evenly convex, extremely highly 

 polished, brilliant golden-aeneous, without trace of irregularity or minute 

 reticulation ; longitudinal carinae at the basal angles short and very strong ; 

 just within each there is a deep, rounded impression ; median line narrow 

 and distinct ; sides narrowly reflexed. Elytra across the humeri nearly twice 

 as wide as the pronotum at base ; sides parallel and nearly straight for three- 

 fourths the length ; disk more than three times as long as the prothorax, 

 acutely rounded behind, rather depressed, slightly less than twice as long as 

 wide ; very strongly punctate, punctures round, very deeply impressed, 

 arranged in striae-like rows ; distance between the punctures in the rows 

 much less than the distance between the latter ; surface variously mottled 

 with yellowish-testaceous and dark blackish-castaneous, with a preponder- 

 ence of the former, very highly polished, with greenish metallic! reflections 

 from the punctures. Under surface polished, piceous-black ; legs pale yel- 

 lowish-testaceous. Length 4.6 mm. 



Arizona. 



The reflected light from the pronotum is tinged with metallic-green 

 toward the edges of the disk, while the full reflected light is of a very 

 brilliant aeneous tint. 



TACHYS. 



T. litoralis n. sp. — Form elongated, narrow, sides parallel. Head and 

 prothorax reddish-testaceous ; elytra darker, fusco;is, tips paler ; legs, oral 



