1 82 Memoirs on the Coleoptera 



undoubtedly British Columbian and not Mexican. Then, from 

 Fort Wrangell, in southern Alaska, there is another form, with the 

 hind body slightly shorter and more inflated than in gracilis, 

 similarly with bright green elytral margins, but with the sides of 

 the prothorax toward base more distinctly sinuate; the elytral 

 sculpture is coarser and deeper than in the female of gracilis; the 

 female type is 13.8 by 5.4 mm, in dimensions and this variety 

 may be known as wrangelli (n. subsp.). Finally, from Helena, 

 Mont., I have a male specimen of very small size, convex form, 

 rather ventricose, much more so in fact than in the males of mar- 

 ginatus and gracilis, black, shining, with violaceous elytra, having a 

 narrow blue margin; head slightly more than half as wide as the 

 prothorax, which is about as long as wide, evenly narrowed in 

 basal half, with the base slightly more than half the maximum width, 

 the elytra coarsely, deeply sculptured, evenly oval, three-fourths 

 longer than wide and scarcely twice as wide as the prothorax; 

 this variety may be called montanicus (n. subsp,). The type is 

 ii.o by 4.4 mm. in dimensions and the anterior male tarsi are 

 slender, the basal joint spongiose only in apical third, the second 

 and third throughout. In all these close allies of marginatus, the 

 male is very much smaller and more slender than the female. 



The following seems to be a distinct species of this marginatus 

 section, with larger prothorax and more gradually posteriorly 

 pointed elytra: 



Brennus oregonus n. sp. — Rather strongly ventricose, moderately 

 convex, somewhat alutaceous and faintly bluish-black on the pronotum, 

 the elytra cupreous, with bright green reflexed margins; under surface 

 and legs shining black; head smooth, four-sevenths as wide as the 

 prothorax, the antennae long and slender; prothorax relatively not so 

 small as in confusus, as long as wide, the sides slightly prominent just 

 before the middle, rounded anteriorly, oblique and straight thence 

 posteriorly to the base, which is just visibly more than half the maximum 

 width; impressions, stria and fovese all rather deep and distinct, the 

 foveae extending evidently before the middle; elytra widest well before 

 the middle, the sides rounded, gradually more feebly arcuate and con- 

 verging thence for a long distance to the acute tip, three-fifths longer 

 than wide, evidently less than twice as wide as the prothorax; disk 

 flattened or concave suturally before the middle, the sutural elevation 

 strong and unbroken along the scutellum and base; striae notably coarse, 

 deep and irregular, very coarsely punctate suturally, less so laterally, 

 thirteen in number; anterior male tarsi slender, the soles of the second 



