3O2 MEMOIRS ON THE COLEOPTERA 



gradually slightly more arcuate and a little more converging ante- 

 riorly; apex two-thirds as wide as the base, rather deeply sinuate, 

 the prominent angles only narrowly obtuse at tip; basal angles right, 

 not rounded; impressions feeble to obsolescent, the stria very fine; 

 inner fovea broad and extremely shallow, with a short fine incised 

 linear part, the outer minute and punctiform to wholly obsolete; 

 elytra in outline and proportion nearly as in the preceding; lateral 

 series finer and more narrowly, less sharply interrupted; striae very 

 fine, coarser and close on the declivity, feebly impressed in the male, 

 the seventh very feeble, the scutellar rather long, fine, oblique; in- 

 tervals feebly convex (cf), flat ( 9 ) ; tarsi slender, blackish. Length 

 (cf 9 ) 57-6.3 mm.; width 2.2-2.7 mm - Rhode Island (Boston 

 Neck) and Long Island (Huntington and Wyandanch), Schott. 



humilis n. sp. 



14 Posterior thoracic puncture very much further*from the side than 

 from the base 15 



Posterior puncture almost symmetrically placed in the basal angle, some- 

 times slightly further from the side than from the base, extremely 

 close to the tip of the angle in polita and allied species 20 



15 Antennae blackish, with the first three joints testaceous 16 



Antennae similar but with only one or two basal joints testaceous; legs 

 always black throughout 17 



1 6 Form rather narrowly oblong-oval, convex, shining, the elytra a little 

 less so in the female, deep black, without metallic lustre; under sur- 

 face and legs black; head rather well developed, fully half as wide 

 as the prothorax and with but moderately convex eyes and simple 

 oblique strioles; antennae moderate in length; prothorax one-half (cf) 

 to three-fifths ( 9 ) wider than long, widest slightly before the base, 

 the sides broadly arcuate, gradually a little more so and converging 

 anteriorly, almost evenly and more moderately arcuate throughout 

 in the male; basal angles more than right and narrowly rounded, the 

 puncture coarse and deep, perforate; apex two-fifths to two-thirds 

 as wide as the base, deeply sinuate, with rather prominent angles; 

 base feebly sinuate toward each side; impressions obsolete, the stria 

 fine; foveae very feebly impressed, sometimes obsolete, excepting the 

 short incised line of the inner; elytra equal in width to the prothorax, 

 one-half longer than wide to somewhat less and gradually rounded 

 behind, the sides very feebly arcuate; lateral series widely spaced 

 medially; striae very fine, slightly coarser on the declivity, not defi- 

 nitely punctured, though sometimes extremely minutely comminuted, 

 the scutellar long, very fine; intervals flat in both sexes; anterior 

 tarsi broadly dilated in the male. Length (cT 9 ) 6.7-7.2 mm.; 

 width 2.8-3.0 mm. Colorado. Levette collection. Three speci- 

 mens tenax n. sp. 



Form more broadly oblong-oval, larger in size, black, usually with de- 

 cidedly bright cupreo-aeneous lustre above; under surface when 

 mature black, the legs rufo-piceous, with black femora; head slightly 

 less than half as wide as the prothorax; thoracic sides converging 

 and feebly arcuate from base to apex, but little more so apically; 

 basal angles right and narrowly rounded, the puncture between two 



