H. C. FALL. 95 



Form broader and more depressed, size larger, strial punctures rela- 

 tively fine. 

 Thorax nearly as long as wide, base and apex subequal ; fourth 



stria sinuate litorale. 



Thorax evidently though not strongly transverse, base wider 



than apex; fourth stria not distinctly sinuate lorquini. 



Side margin of thorax with median seta. 



Mentum tooth shorter, triangular; thorax strongly transverse, apex 

 nearly as wide as base. 

 Mentum tooth acute at apex ; hind angles of thorax evidently cari- 



nulate carinula. 



Mentum tooth truncate and usually somewhat emarginate at apex ; 



hind angles of thorax not distinctly carinate zephyr um. 



Mentum tooth elongate, parallel, tip truncate; thorax moderately 

 transverse, apex evidently narrower than the base. 



Fourth elytral stria sinuate; size smaller lacustre. 



Fourth elytral stria not sinuate, size larger.... pimctatostriatiim. 



B. hesperum n. sp. 



Moderately elongate and convex, green bronze, first four elytral inter- 

 vals in great part, and the fifth at middle dark cupreous or cupreo- 

 violaceous, the quadrate impressions green ; surface throughout alu- 

 taceo-granulose, more finely so on the prothorax and on the cupreous 

 elytral areas, which are more shining. Palpi dark, more or less pale 

 at base; basal joint of antennae pale beneath. Prothorax fully four- 

 fifths as long as wide, widest at middle, base one-fourth wider than 

 the apex; sides finely margined, moderately sinuate behind, the hind 

 angles not very prominent, sharply defined, almost rectangular; sur- 

 face finely transversely creased or wrinkled ; median line almost entire ; 

 basal impressions unistriate, the angles not carinate. Elytra about 

 three-fifths wider than the prothorax, striae somewhat impressed, 

 rather coarsely and closely punctate, more finely apically as usual ; 

 fourth not or scarcely sinuate. Beneath greenish-black, legs pale at 

 base. Length, 5.2-5.3 mm. ; width, 2.2-2.25 mm. 



Vancouver Island (type) and California (Placer County). 



As its position in the table indicates, this species is nearest 

 incequale, with which it agrees nearly in general form. It 

 seems to average a trifle larger than incequale, and is more 

 prettily colored ; the hind angles of the prothorax are not 

 quite so prominent and are slightly obtuse ; the tibiae, palpi, 

 and base of antennas less pale. The mentum tooth is rather 

 short, subtriangular, the tip truncate and a little emarginate. 



TRANS. AM. ENT. SOC, XXXVI. MAY, 1910. 



