Platynin.'E 109 



tidum at hand; elytra more gradually rounding behind but 

 otherwise nearly similar in structure. Length (cf) 8.0 mm.; 



width 2.8 mm. Minnesota (Duluth) borealiniun n. subsp. 



Elytra very gradually and more strongly rounded at apex 15 



15 — Form elongate-suboval, convex, polished, the upper surface blackish, 

 greenish or bluish, sometimes feebly aeneous; under surface, legs, 

 antennae and palpi deep black; head nearly as in the preceding but 

 larger, two-thirds as wide as the prothorax, the small impressions 

 irregular; antennae nearly half as long as the body in the male; 

 prothorax a fourth to third wider than long, in structure nearly as 

 in the preceding but more narrowed behind, the base obviously 

 narrower than the deeply sinuate apex; elytra more oval and less 

 oblong, the sides distinctly arcuate, slightly over one-half longer 

 than wide and a third wider than the prothorax, very gradually 

 narrowing and less obtusely rounded at apex, the oblique sinus very 

 feeble; striae rather fine, deeply grooved, smooth; intervals and 

 dorsal punctures as in seniinitidum; met-episterna three-fourths 

 longer than wide; anterior male tarsi distinctly dilated. Length 

 (cf) 8.7-8.8 mm.; width 3.2 mm. Colorado (Magnolia, Boulder 



Co.) ovalicauda n. sp. 



Form narrower, smaller in size, polished above, in color nearly as in the 

 preceding, but with the anterior parts brighter green and the elytra 

 wholly obscure cupreous, faintly greenish along the side margins; 

 head nearly similar but narrower and somewhat more elongate, the 

 antennal joints distinctly shorter; prothorax a third wider than 

 long, widest before the middle, in this as well as general structure 

 nearly as in the preceding, except that the apex is less deeply sinuate 

 and the basal margin is somewhat thickened medially, but not so 

 conspicuously as in longulum, from which this species differs in its 

 smaller size, narrower form and relatively narrower prothorax; 

 foveae irregularly oval, feebly impressed and more discal than in 

 the other species, being distant from the base as well as sides; 

 elytra shorter, though more than one-half longer than wide, parallel, 

 with nearly straight sides, more rounding at base, fully a third 

 wider than the prothorax, very gradually and somewhat ogivally 

 rounding behind, the sinus not more than straight; striae finer than 

 in any of the related species, not deep, smooth; intervals nearly 

 flat, the third with four punctures in an anterior and a posterior 

 pair; met-episterna one-half longer than wide; anterior male tarsi 

 distinctly dilated. Length (cf) 7-5 mm-"- width 2.65 mm. Colo- 

 rado. Levette collection esuriale n. sp. 



Perforatiis Lee, belongs to the octopunciatum and pacificum 

 section; it diflfers in color and lustre from the former and it is 

 smaller than pacificum and has only four dorsal punctures. The 

 synonymy given under seminitidum is that proposed by LeConte 

 himself, but the type of cupreum Dej., as shown by the description 



