PLATVXIN.^i 67 



about basal half, the angles obtuse, with blunt tips; base as wide 

 as the distinctly sinuate apex, rounded and moderately oblique at 

 the sides, the anterior impression deep, the posterior obsolescent; 

 foveae large, oval, deeply concave, not quite smooth, not anteriorly 

 prolonged and well separated from the sides, which are distinctly 

 reflexed at base, finely so elsewhere; elytra oblong, subinHated 

 behind, not over a third longer than wide, fully three-fourths wider 

 than the prothorax, the sides rather gradually more rounding at 

 base; apex rapidly and broadly obtuse, with rather long but feeble 

 sinus; striae fine, smooth, entire; intervals very nearly fiat, the 

 third with four punctures, which arc about as strong as in frigidulus 

 and much larger than in lasciviis; ninth stria close to the edge; met- 

 episterna one-half longer than wide; tarsi only moderately long. 

 Length (9) 6.3 mm.; width 2.5 mm. Idaho (Priest River), — 

 Wickham dissensus n. sp. 



16 — Form less elongate and rather more depressed, the elytra more 

 shining, slightly metallic and without trace of interstitial punctu- 

 lation. Black, the prothorax above and beneath and the legs 

 testaceous, the head strongly, the elytra feebly, metallic-green; 

 head but slightly elongate, almost as wide as the prothorax, with 

 large and very prominent eyes, the anterior impressions deep and 

 slightly oblique; antennae filiform, black, testaceous basally, three- 

 fifths as long as the body, the third joint slightly shorter than the 

 fourth; palpi slender, the third and fourth joints equal in length; 

 prothorax shining, parallel, a fourth wider than long, the sides 

 moderately, subevenly rounded except near the base, where they 

 rapidly become slightly sinuate, the angles somewhat obtuse but 

 with sharp tips; base oblique at the sides, as wide as the rather 

 feebly sinuate apex; margins very finely reflexed; anterior impres- 

 sion close to the apex and almost completely obsolete; stria finely 

 impressed, entire; fovese linear, very deeply impressed, smooth, 

 obliquely traceable to the middle; elytra oblong, parallel, with 

 nearly straight sides, strongly rounding at the humeri, one-half 

 longer than wide, about twice as wide as the prothorax, gradually 

 and evenly rounded behind, the sinus very feeble; striae fine but 

 deep, grooved, the close micro-punctulation scarcely observable; 

 intervals flat, the third with five small but very distinct punctures; 

 scutellar stria long, the ninth half as far from the edge as from the 

 eighth; legs long, the anterior male tarsi distinctly though not 

 broadly dilated and smooth above. Length (cT 9) 7.1-8.0 mm.; 

 width 2.65-3.1 mm. Utah luxatus n. sp. 



Form much elongated, moderately convex, the elytra less shining, with- 

 out metallic reflection and with numerous interstitial punctures, 

 which are equally distributed and bearing each a short pale seta. . 17 



17 — Body very elongate, moderately convex, black, the prothorax above 

 and beneath, scutellum, mesosternum and legs pale flavo-testaceous; 

 head polished and bright metallic-green, the elytra dull and feebly 

 greenish; head scarcely longer than wide, evidently narrower than 

 the prothorax, with large and prominent eyes; antennae nearly 

 three-fifths as long as the body, black, the three basal joints and 



