Platynin.e ioi 



less transverse, scarcely more than a fourth wider than long, 

 otherwise nearly similar, the fovese still less concave; elytra more 

 elongate and more gradually arcuately narrowed behind, scarcely 

 more than a third wider than the prothorax, three-fifths longer than 

 wide, the sinus equally distinct but more oblique; striae similar, 

 the intervals nearly flat, the third with the usual six punctures; 

 surface with small but very distinct interstitial punctures through- 

 out, equally evident from the sides to the suture; met-episterna 

 nearly similar but less rapidly narrowed from the base; metasternum 

 less evidently punctulate; anterior male tarsi feebly dilated. Length 

 (cf") 9.7 mm.; width 3.6 mm. California (Hoopa Valley, Hum- 

 boldt Co.) angustior n. sp. 



There is marked inconstancy in form and size among the numer- 

 ous specimens of macuUcolle at hand, and for this and other reasons 

 this subgenus should be regarded as one of those recently developed 

 plastic groups, like Brenntts and Omus, inhabiting the same regions; 

 angustior from more northern parts seems, however, to have become 

 sufficiently isolated to be regarded as a distinct species. The hind 

 wings in this group are completely wanting, there being not even a 

 vestigial remnant, at least in macuUcolle. 



Group II — cupripeyme 

 Subgenus Agonum in sp. 



In general terms there is a rather marked mutual resemblance 

 among the numerous species of the true Agonum as here considered. 

 They are all pronouncedly metallic in coloration, and the general 

 form' of the body is more subparallel than in the preceding group, 

 where the outline is more oval and convex and the integuments 

 devoid of any vestige of metallic reflection. But in minor char- 

 acters, such as the number and size of the dorsal punctures of the 

 elytra, there is considerable diversification. A tabular statement 

 of the species is a matter of some difficulty, but perhaps the fol- 

 lowing arrangement may serve some useful purpose: 



Dorsal punctures of the elytra notably large and impressed 2 



Dorsal punctures very fine 3 



2 — Dorsal punctures four in number, very large and foveiform; body 

 rather small, oblong, moderately convex, only moderately shining, 

 black, the upper surface brownish-aeneous, broadly bright green 

 toward the sides; under surface metallic green, the legs obscure 

 rufous, the femora greenish-metallic; head green, becoming obscure 

 aeneous basally, as wide as long, much narrower than the prothorax, 

 with large and prominent eyes; antennae slender, half as long as 



