American Caraboidea 149 



scutellum distinct, obtusely ogival; elytra about twice as long as wide, 

 gradually inflated behind, with nearly straight sides, broadly rounding 

 at base, widest near apical third, barely a third wider than the prothorax, 

 gradually evenly rounded at apex; striae nine in number, rather coarse, 

 deeply impressed and distinctly punctured, and, except the sutural, 

 obsolete at apex; intervals broadly convex, the third with three im- 

 pressed punctures adjoining the third stria; scutellar stria long, the 

 second regular stria deflexed basally to the subscutellar puncture; sides 

 of the metasternum and first ventral, also the met-episterna coarsely 

 punctate; first three joints of the anterior male tarsi moderately inflated, 

 convex above, spongy-pubescent beneath ; legs long and slender. Length 

 (cf ) 9.8 mm.; width 3.25 mm. California (Humboldt Co.). A single 

 example. 



Distinguishable at once from ferriiginosiis and nigropiceus by 

 the much larger size, more elongate form and relatively very much 

 larger prothorax, also from the former by the posteriorly inflated 

 elytra, equally distinct in nigropiceus, and from the latter by the 

 relatively smaller head, in which it accords better V7\i\\ ferniginosus. 

 As in the other species of this very isolated genus, as well as Nehria 

 and Pelophila, there is but one supra-orbital seta and the anterior 

 tibiae are briefly and very deeply sulcate beneath at apex. Dr. 

 Horn does not seem to allude to the long thread-like antenna?, 

 with the fourth joint very much shorter than the third or fifth; 

 this proportion of the joints is feebly evident in the very much 

 shorter and stouter antennae of Nsbria and Pelophila, proving also 

 in this way, that these three genera form a natural group, 



Nebria Latr. 

 A considerable number of new forms in this genus have come to 

 light recently, and I am now convinced that a series from Labrador, 

 which I formerly held to represent sahlbergi Fisch., does not have 

 this status but is doubtless an undescribed species. The numerous 

 species of the European fauna, where also Leistus is greatly de- 

 veloped, when compared with North America, are divided into a 

 number of named subgenera; our own species do not lend them- 

 selves so readily to this form of subdivision, the only ones known to 

 me at present which might be assigned to a separate subgenus 

 being virescens Horn, with the allied brevis Csy., and the ingens 

 section; the habitus of these species is notably different from that 

 characterizing the many other species; perhaps pallipes and allied 

 species might form another subgenus. 



