ROLAND HAYWARD. 69 



from which it was taken to B. breve, although of course one cannot 

 be absolutely sure of the correctness of the identification except by 

 a comparison with the types. 



From B. incertum it ditFers by the punctate stride of the elytra, all 

 but the first of which are abbreviated behind, while from nebraskense, 

 which agrees with it in having the elytral strije punctured, it is dis- 

 tinct by its broader form, by the thorax less narrowed behind and 

 the abbreviated stride of the elytra. 



The only specimens known to me are from the Yellowstone Park, 

 Wyo. (Bowditch), and Nevada. It was described by Motschulsky 

 from Sitka. 



37. B. nebraskeiise Lee. — Form slightly elongate, depressed ; color lilaek. 

 slightly seueous. shining. Head scarcely as wide as the thorax at apex ; palpi 

 black ; antennae about one-half as long as the body, black. Prothorax more than 

 one-half wider than long, very distinctly narrower at base than apex, slightly 

 rugose at base ; apex truncate; median line distinct, abbreviated before and be- 

 hind; transverse impressions distinct; basal impressions broad, deep, bistriate ; 

 sides with the margin narrowly reflexed, arcuate in front, oblique behind, at most 

 obsoletely sinuate in front of the hind angles, which are obtuse, but not rounded, 

 carinate. Elytra less than one-half wider than the thorax, oblong-ovate, finely 

 striate; stria? entire, finely punctate to behind the middle, more finely impressed 

 at apex, the outer ones nearly effaced ; third stria with the first dorsal puncture 

 about one-third from base, the second about one-fourth from apex: intervals flat. 

 Beneath black, shining. Legs piceous or nearly black. Length .16-. 20 inch ; 

 4-5 ram. 



The thorax is more narrowed behind in this species than in any 

 other of the group, and the elytral stripe are finely punctate. As 

 remarked by Dr. LeConte, " it bears a strong resemblance to a 

 Blechrus.'' 



It occurs throughout a large part of the region west of the Mis- 

 souri River, being known to me from Nebraska, Wyoming, Colorado, 

 New Mexico, Utali, California, Oregon, Washington, Albei'ta and 

 British Columbia. 



Group viii. trans versale. 



Maxillse with the outer lobe biarticulate. Frontal grooves single, 

 straight, parallel ; eyes moderately large and prominent. Prothorax 

 trapezoidal, scarcely convex, the basal impre.s.sions either unistriate 

 or feebly bistriate, with the outer stria very small. Elytra sometimes 

 maculate, with two dorsal punctures on the third stria ; humeri 

 rounded ; eighth stria not distinct from the margin. 



In many respects the present group seems intermediate between 

 the last and the next. With the former it agrees in the form of the 



TRANS. AM. ENT. SOC. XXIV. MARCH, 1897. 



