84 AMERICAN COLEOPTERA. 



Descril')ed from about a dozen specimens from New Mexico and 

 Arizona. 



57. O. grapii Gyll. — Form elongate, slightly convex ; color black, slightly 

 seneous, shiuing. Hear! as wide as the thorax at apex; palpi black; antennae 

 more than one-half as long as the body, black, the first joint sometimes more or 

 less rufous. Prothorax about one-half wider than long, narrower at base than 

 apex, slightly rugose at base: apex feebly emarginate; median line distinct, ab- 

 breviated before and behind ; transverse impressions distinct ; basal impressions 

 deep, bistriate : sides with the margin very narrowly reflexed, strongly arcuate 

 in front, deeply sinuate behind ; hind angles rectangular, carinate. Elytra nearly 

 one-half wider than the thorax, oblong-oval, finely striate ; strise distinctly punc- 

 tate to behind the middle, the first, second, and often the fifth entire, tlie latter 

 either grooved or represented by a groove at apex, the others more or less abbre- 

 viated behind ; third stria with the first dorsal puncture about one-third from 

 base, the second about one-third from apex ; intervals nearly flat. Beneath black, 

 shining. Legs black, the tibise beneath and the tarsi sometimes paler (probably 

 from immaturity). Length .16-. 18 inch ; 4-4.5 mm. 



Distinct from an}' other species in our fauna. It is subject to 

 slight variation. Specimens from Xevada and the extreme West 

 have the striae deeper and less abbreviated behind, the fifth deeper 

 and usually entire, and the thorax with the sides rather less deeply 

 sinuate behind than in eastern examples. The two forms, however, 

 intergrade. 



It occurs in northern Europe, in Greenland, and on this continent 

 in the Hudson Bay Territory and the more northern portions, ex- 

 tending southward along the Sierras to Nevada, along the Rocky 

 Mountains to Colorado and New Mexico, while in the East it occurs 

 abundantly in the White Mountains of New Hampshire. 



58. B. califoriiicuin n. sp. — Form slender, elongate, convex ; color seneous. 

 or uigro-aeneous, very shining. Head as wide as the thorax at apex ; palpi rufous, 

 darker towards the tip ; antennae about one-half the length of the body, fuscous, 

 the basal joints testaceous. Prothorax slightly wider than long, distinctly nar- 

 rower at base than apex ; apex truncate ; median line fine, abbreviated in front ; 

 transverse impressions distinct, the posterior deeper : basal impressions deep, bi- 

 striate; sides with the margin very narrowly reflexed, arcuate in front, sinuate 

 behind ; hind angles rectangular, finely carinate. Elytra about one-half wider 

 than the thorax, oblong-oval, finely striate ; strife deeply, not closely punctate, 

 the first only entire, tlie fifth represented by a groove at tip; third stria with the 

 first dorsal puncture about one-third from base, the second about one-third from 

 apex; intervals nearly flat. Beneath nearly black, shining. Legs test.aceous. 

 Length .14-. 17 inch ; 3.5-4.25 mm. 



A very pretty little species, which bears a strong superficial re- 

 semblance to semistriatum. It differs, however, in the arrangement 

 and number of the dorsal punctures, which in the latter species are 



