American Caraboidea i8i 



or greenish; under surface and legs deep polished black, the epipleura 

 violaceous; head narrow, only half as wide as the prothorax; antennae 

 slender, not quite as long as the elytra; prothorax large, slightly wider 

 than long, the strongly rounded and moderately reflexed sides becoming 

 abruptly oblique and nearly straight in basal half, the angles obtuse, 

 rounded; base transverse, rather wider than the apex and distinctly 

 more than half the maximum width; impressions and foveae distinct, the 

 latter extending well before the middle; elytra evenly elongate-oval, 

 three-fourths longer than wide, one-half wider than the prothorax, the 

 sides gradually but little more rounded basally, the striae very coarse 

 and deep, slightly irregular and about thirteen in number; intervals 

 convex, more or less interrupted; strial punctures coarse, deep; anterior 

 tarsi very slender, the second and third joints and the first in apical 

 half spongiose beneath; last ventral segment with a small aoical sinus. 

 Female much larger than the male, with relatively smaller prothorax 

 and with the metallic lustre much less pronounced, the elytral stria; not 

 quite so coarse, close-set or deep, very irregular; head half as wide as 

 the prothorax, the latter very nearly as long as wide, otherwise almost 

 as in the male; elytra elongate-oval, more gradually arcuately attenuate 

 behind than in the male, two-thirds longer than wide, very nearly twice 

 as wide as the prothorax. Length (cf ) 15.5, (9 ) 17.0 mm.; width (cf) 

 5.8, (9) 6.8 mm. British Columbia (Victoria). 



The female, when compared with the female type of insularis 

 Csy., has less brilliant metallic elytra, which are also less elongate, 

 more gradually acuminate behind and less coarsely or deeply striate, 

 the prothorax relatively a little smaller in size, the head decidedly 

 narrower; in insularis it is much more than half as wide as the 

 prothorax and, in the latter, the reflexed elytral margins are bright 

 golden, while in columhianus they are bright blue or green as stated. 



Of the smaller species with metallic coloration and coarsely, 

 deeply and irregularly striate elytra, allied to marginatus, there 

 are many forms having a subordinate status; marginatus itself is 

 represented before me by a large series of between thirty and forty 

 specimens, comprised in the collections from St. Paul Island, 

 Alaska, alluded to before under heringi; in every one of these 

 specimens, varying from 10 to 14 mm. in length, the side margins 

 of the elytra are brilliantly golden, rarely feebly greenish-golden; 

 this is the true marginatus. Taken abundantly in British Columbia 

 and Washington State by Keen and others, there is a form of similar 

 length but more slender, having darker metallic coloration and 

 invariably green elytral margins, there being no exception in about 

 forty specimens examined; I take this to be gracilis Gehin, the 

 locality having been quoted erroneously by the author, as it is 



