104 Memoirs on the Coleoptera 



obsolete to evident, the stria fine, the foveae short, linear, deeply 

 impressed, nearly smooth, attaining the base but as usual remote 

 from the sides; elytra oblong, slightly over one-half longer than 

 wide, somewhat less than one-half wider than the prothorax, the 

 sides gradually more arcuate at base; apex obtusely rounded, the 

 sinus scarcely more than straight; striae very fine, not evidently 

 punctulate; intervals flat or nearly so, the three punctures of the 

 third distinct, nearly as in the preceding; tarsi and met-episterna 

 almost similar. Length (cf 9 ) 7.8-8.8 mm.; width 2.9-3.4 ^nrn- 

 New Jersey and Lake Champlain to Lake Superior and Idaho (Cceur 

 d'Alene). Rather common and extremely active. [Agonum nitidu- 



lum and cupreum Dej.] cupripenne Say 



Prothorax relatively shorter, distinctly transverse. Regions from the 



Rocky Mountains to the Pacific 7 



7 — Form more broadly oblong, larger in size, moderately convex, shining, 

 the elytra alutaceous — faintly (cf) but strongly (9), black, with 

 bright green metallic lustre anteriorly and along the sides of the 

 elytra, the median parts of the latter cupreous; under surface and 

 legs black, with feeble greenish lustre; head three-fifths as wide 

 as the prothorax, with rather prominent eyes and nearly obsolete 

 impressions; antennae black throughout, not half as long as the 

 body; prothorax transverse, fully two-fifths wider than long, the 

 evenly rounded parallel sides moderately reflexed, the angles broadly 

 rounded; apex distinctly sinuate, the surface with feeble distant 

 rugulse, the impressions obsolete, the median stria fine; foveae discal, 

 not very long, linear but widely and deeply impressed, the fovea! 

 region sparsely punctured; elytra oblong, parallel, one-half longer 

 than wide, two-fifths wider than the prothorax, rapidl}' and obtusely 

 rounded at apex; striae fine with very small and close-set punctures, 

 the intervals flat, the punctures of the third very distinct, the anterior 

 near the third, the two posterior near the second, stria; met-episterna 

 twice as long as wide; anterior male tarsi distinctly dilated; apical 

 sinus of the elytra long and feeble though evident. Length (cf ? ) 

 9.5-10.0 mm.; width 3.7-4.0 mm. British Columbia (Agassiz) to 



southern Oregon. Eleven examples sufEusum n. sp. 



A- — Nearly as, in suffiistim but a trifle stouter and differing in having 

 the entire elytral surface green, with almost imperceptible aeneous 

 tinge internally, their surface still more opaque in the female; 

 general characters throughout similar, except that the apical 

 elytral sinus is much shorter and very feeble. Length ( 9 ) 9-9 

 mm.; width 4.2 mm. California (the locality unrecorded), — 



Knaus latiusculum n. subsp 



B — Somewhat as in siiffustim but much smaller and rather less convex, 

 the antennae not so long and with distinctly more abbreviated 

 joints, the third more evidently longer than the fourth; pro- 

 thorax similarly transverse and rounded at the sides, but with 

 the basal angles more defined though very obtuse and blunt; 

 elytra opaculate in the female, green throughout, suffused with 

 very feeble aeneous tint internally. Length (9) 8.5 mm.; width 

 3.4 mm. Utah (Ogden) uteanum n. subsp. 



