Sept. 1897.] HaYWARD : COLEOPTERA OF N. E. AMERICA. 135 



6. Elytra with the fourth stria sinuate. , 7 



Elytra with the fourth stria straight 8 



7. Slender, elongate, convex ; thorax as long as wide, not wider at base than apex, 



hind angles subacute ; elytra deeply .striate, the striae distinctly punctate; legs 

 seneous, the femora at base and the tibice more or less testaceous. Length, 



.19-.22 inch ; 4.75-5.5 mm inaequale. 



Broader, less convex ; thorax distinctly wider than long, slightly wider at base 

 than apex; hind angles varying from subrectangular to subacute; elytra less 

 deeply striate, the stride more finely punctate ; legs variable, usually nearly as 

 in itKEquale. Length, . 19-. 26 inch ; 4.75-6.25 mm littorale. 



S. Broad, slightly depressed ; thorax nearly twice as wide as long, not wider at base 

 than apex, sides arcuate in front, deeply sinuate behind, basal foveae distinctly 

 bistriate, hind angles subacute, carinate ; elytra finely striate, the striae finely 

 punctate; legs varying from seneo-piceous to teneo-testaceous. Length, .22-. 28 



inch; 5.5-7 mm carinula. 



Robust; thorax about one-half wider than long, wider at base than apex, sides 

 slightly arcuate in front, sinuate behind, basal fovea; feebly or obsoletely bi- 

 striate, hind angles prominent, acute; elytra deeply striate, the stride deeply 

 punctate ; legs dark aeneous, the femora at base and the tibiae more or less 

 rufous. Length, .22-. 30 inch ; 5.5-7.5 mm punctatostriatum. 



9. Thorax wider at base than apex 10 



Thorax not wider at base than apex n 



\o. Robust, bronzed, shining; thorax nearly twice as wide as long, sides arcuate in 

 front, sinuate behind, hind angles acute, carinate ; elytra moderately deeply 

 striato-punctate ; legs rufo-piceous, slightly aeneous, the femora rufous at base. 

 Length, .23-.25 inch; 5.75-6.25 mm robusticolle. 



11. Feebly convex; bronzed, varying to bluish-black, shining; thorax about one-halt 



wider than long, sides moderately arcuate in front, sinuate behind ; hind 

 angles slightly prominent, subacute, very finely or obsoletely carinate ; elytra 

 deeply striato-punctate ; legs seneo-piceous, the femora at base and the tibice 



rufous. Length, .22-.26 inch ; 5.5-6.5 mm COxendix. 



More robust ; bronzed, usually coppery, elytra with the discs obscurely testaceous ; 

 thorax rather less than one-half wider than long, sides arcuate nearly to base, 

 feebly sinuate in front of the hind angles, which are subrectangular and feebly 

 carinate; elytra moderately deeply striato-punctate, the punctures usually 

 greenish; legs testaceous. Length, .18-.27 inch; 4.5-6.75 mm. 



confusum. 



12. Eighth stria of the elytra moderately near, but distinct from the margin 13 



Eighth stria of the elytra indistinct from the margin ; humeri rounded 16 



13. Humeri of elytra subangulate, all the strice entire ; hind angles of thorax not car- 



inate ; color more or less bronzed, sometimes greenish or bluish 14 



Humeri of elytra rounded ; hmd angles of thorax carinate 15 



14. Elytra with the dorsal punctures large, round, foveiform. 



Thorax narrower at base than apex, sides moderately arcuate in front, slightly 

 sinuate behind, hind angles subrectangular; elytra finely striate, very finely 



alutaceous, shining. Length, .20-.24 inch ; 5-6 mm americanum 



Elytra with the dorsal punctures normal. 



