. ROLAND HAYWARD. 73 



be well to euumerate some of the more importaut. The mitennte 

 vary in length and in the number of pale basal joints; they are 

 usually slightly more than one-half the length of the body and have 

 from one to three and a half joints testaceous. The prothorax is 

 usually as wide at base as apex, sometimes slightly narrower, and its 

 width varies slightly as compared with its length ; the sides vary 

 from distinctly to very feebly sinuate behind, the hind angles being 

 either rectangular or slightly obtuse, and sometimes obsoletely cari- 

 nate. The elytra vary in the depth of their strife, v/hich are more 

 or less distinctly, or in some cases almost crenulately punctate, the 

 seventh stria varying from entii'e to obsolete ; their color varies as 

 above indicated, as does their width as compared with that of the 

 thorax to a slight degree. Finally, the legs vary in color from en- 

 tirely pale testaceous to nearly rufous, with the femora rarely piceous. 



As above defined this species includes erosum Mots., and several 

 other species which have from time to time been established on what 

 then seemed good characters, but which have one by one been united 

 either with transversale or erosum, as the characters on which they 

 were based have become evanescent. It now seems to me that the 

 last named species must also be suppressed, as I have been unable to 

 find any constant characters for its sepai*ation. Those who have 

 seen but few examples from widely separated localities may be sur- 

 prised at this course, but when one comes to study, as I have done, 

 several hundred specimens from all parts of its range, I think the 

 necessity of its adoption will he I'ecognized. 



It is most nearly related to B. lagnbre. 



Its range of distribution is very extended. I have seen specimens 

 from Canada, Michigan, Wisconsin, the Lake Superior region, Ne- 

 braska, Kansas, Colorado, Wyoming, Utah and from various points 

 on the Pacific coast from Alaska to Southern C-alifornia. It is known 

 to me from as far east as the Gulf of the St. Lawrence (Henshaw). 



42. B. luglibre Lee. — Form more slender and elongate than in tramversale, 

 feebly convex ; color black, shining, with distinct bluish or greenish reflections 

 rarely with the apes of the elytra more or less testaceous. Head as wide as the 

 thorax at apex ; palpi rufons, darker at tip ; antennae more than one-half as long 

 as the body, piceous, the basal joints rufous. Prothorax distinctly wider than 

 long, as wide at base as a])ex, at most very slightly rugose at base ; apex feebly 

 emarginate; median line distinct, extending between the transverse impressions, 

 which are distinct: basal impressions deep, the outer stria obsolete; sides with 

 the margin distinctly reflexed, arcuate to behind the middle, distinctly sinuate in 

 front of the hind angles, which are sub-acute and very finely carinate. Elytra 



TRANS. AM. ENT. SOC. XXIV. (10) MARCH, 1897. 



