AMARIN/E 305 



at the middle of the equally wide interval on the right elytron; 

 striae nearly as in the preceding, the long scutellar more disintegrated, 

 the striae similarly but slightly coarser on the declivity; intervals 

 virtually flat; middle tibiae of the male a little longer and less bent. 

 Length (cf ) 7.3 mm.; width 3.1 mm. Colorado (Boulder Co.). 



oblongula n sp. 



20 Antennae dark, with the three basal joints testaceous 21 



Antennae similarly dark, with the first two joints at least in part testa- 

 ceous 30 



21 Posterior thoracic puncture larger, well separated from both side 

 and base; thoracic foveae generally feeble 22 



Posterior puncture small and extremely close to the apex of the basal 

 angle; species small and usually aeneous; thoracic foveae both deep 

 and conspicuous, the outer oblique postero-laterally 26 



22 Head well developed, always fully half as wide as the prothorax 

 and sometimes wider 23 



Head notably small, not or barely half as wide as the prothorax 24 



23 Form stout, oblong, rather convex, black, shining, the male with 

 very feeble bronzy lustre; micro-reticulation of the elytra strong in 

 both sexes, but rather finer and denser on the strongly alutaceous ; 

 elytra of the female; under surface and legs black; head notably 

 large, more than half as wide as the prothorax, the eyes moderately 

 convex, strioles short but coarse and deep; antennae long, extending 

 somewhat behind the thoracic base; prothorax one-half wider than 

 long, with the sides strongly rounding and converging anteriorly, 

 straighter and parallel posteriorly; basal angles right, the puncture 

 very coarse and deep, slightly nearer base than side; base broadly 

 sinuate laterally, arcuate near the angles; apex almost three-furths 

 as wide as the base, deeply sinuate, with prominent but bluntly 

 pointed angles; impressions subobsolete, the stria distinct; foveae 

 very feeble, the inner short, rectilinear, the outer very feeble, ob- 

 lique; elytra only two-fifths longer than wide, about as wide as the 

 prothorax, rapidly and obtusely ogival behind; lateral series widely 

 spaced but not interrupted medially; striae fine but sharp, impunc- 

 tate, only slightly coarser on the declivity, the scutellar long, ob- 

 lique, entire; intervals virtually flat, just visibly more than flat in 

 the male, not more convex apically. Length (cf 9 ) 9.010.0 mm.; 

 width 3.7-4.1 mm. California (San Francisco). Abundant. 



conflata Lee. 



Form less stout, oblong and much smaller in size, similarly deep black 

 throughout, the male highly polished and very feebly bronzed, the 

 female elytra alutaceous but less opaculate than in conflata; head 

 large, evidently more than half as wide as the prothorax, the eyes 

 rather convex; antennae a little shorter than in the preceding but 

 otherwise nearly similar; prothorax one-half or more wider than long, 

 the sides converging and broadly arcuate in about anterior half, 

 thence parallel and straighter to the base, the posterior puncture 

 very nearly at equal distance from side and base, the other features 

 nearly as in conflata; elytra almost one-half (cf), two-fifths (9), 

 T. L. Casey, Mem. Col. VIII, Oct. 1918. 



