American Caraboidea 153 



This distinct species differs from eschscholtzi Men., in its much 

 stouter form, larger head, shorter and much more transverse pro- 

 thorax and other features; the arcuate ridge at the apex of each 

 elytron is better developed and more distinct. 



Nebria formalis n. sp. — Outline slightly broader and more ventricose 

 than in eschscholtzi and rather more convex, paler in color, piceous, the 

 thoracic margins more diaphanously pallid; legs similarly long, slender 

 and pale; head nearly as in eschscholtzi but without two paler spots 

 between the eyes, though having a transverse space nubilously paler 

 but evident only in the darker specimens; maxillary palpi with relatively 

 shorter third and longer fourth joint; prothorax nearly similar but 

 relatively smaller in size and with deeper and more punctate transverse 

 impressions, the deep and lunate, slightly oblique fovea; traceable an- 

 teriorly almost to the middle; scutellum more transverse, ogival; elytra 

 more oval and less oblong, the sides at base being less inwardly rounded, 

 three-fifths longer than wide and one-half wider than the prothorax, 

 slightly more inflated behind the middle, the sides thence anteriorly 

 broadly arcuate and not nearly straight as in eschscholtzi; surface more 

 convex, the striae not so fine, much more impressed and more distinctly 

 punctulate; intervals convex suturally, the third with four moderJite 

 impressed punctures adjoining the third stria; anterior male tarsi with 

 the first three joints rather widely dilated. Length 10.2-10.9 mm.; 

 width 3.9-4.4 mm. Washington State (Wawawai), — Hyslop. Com- 

 municated by Mr. Wade. Two males and two females. 



The basal joint of the anterior male tarsi in eschschoUzi is scarcely 

 as long as the next two together, while here it is fully as long. The 

 present species differs in its paler coloration, more convex and 

 ventricose form, relatively smaller prothorax, more arcuate sides 

 of the elytra and in some other obvious features; the short longi- 

 tudinal ridge at the apex of each elytron is nearly similar. 



Carabus Linn. 

 The species tcedatus Fabr., is common over a large extent of 

 country from Indiana to Colorado; the head is in greater part 

 smooth and is without any conspicuously deep sculpture; agassii 

 of LeConte, from Lake Superior, is a synonym of this species, a 

 west coast species with more sculptured head and more elongate 

 form of body having been mistaken by LeConte for tcedatus in his 

 comparisons. In southwestern Alaska occurs a form resembling 

 tcedatus but smaller, with relatively much smaller prothorax; it 

 has the head conspicuously sculptured and bicanalate and was 

 named haccivoms by Fischer; it is a distinct species and not a 



