14 MEMOIRS ON THE COLEOPTERA 



2 Larger species, in the neighborhood of 10 mm. in length 3 



Smaller species, about 7 or 8 mm. in length; basal bead of the prothorax 

 always strong and equal throughout the width; elytral punctures 

 strong, more or less coalescent in short lines, the series more close-set, 

 the second interval broad and confusedly punctate 6 



3 Hind tibiae surate but more slender, between three and four times as 

 long as wide in both sexes 4 



Hind tibiae stouter and strongly surate, scarcely three times as long as 

 wide 5 



4 Form rather short, stout and convex, evidently broader posteriorly, 

 black above and beneath, the head and pronotum with feeble 

 metallic lustre, the elytra pale brownish-flavate, irregularly black 

 toward the sides, along the apex and in an inner larger and outer 

 smaller discal spot just before the middle, the convex sutural 

 interval also blackish, as are all the punctures; head very densely 

 punctato-rugose, the clypeus flat, with the edges rather finely and 

 subequally reflexed, trapezoidal, with rounded angles, not quite 

 twice as wide as long; antennal club (cf) a little longer, or ( 9 ) 

 slightly shorter, than the entire stem; prothorax trapezoidal, widest 

 at base, especially in the male, the angulation before the middle 

 broadly rounded; apex sinuate, with prominent but blunt angles; 

 base strongly lobed medially, with entire strong beading, the angles 

 rounded; surface very finely, sparsely punctate, more strongly and 

 closely near the sides and basal angles; scutellum sparsely punctured; 

 elytra not or but little longer than wide, the series of very moderate 

 punctures not or scarcely impressed, the second interval confusedly 

 punctate; sterna and hind coxae with rather dense, long and silky 

 gray hair. In the male the entire body, legs and elytra are occasion- 

 ally intense black throughout. Length (cf 9 ) 9.8-11.8 mm., 

 width 5.3-6.4 mm. New York and Virginia, westward to Kansas. 

 [Melolontha unifasciata Say; Anomala marginella Lee.] 



binotata Gyll. 



Form narrower, more elongate and still more cuneiform, similar in color 

 and lustre to the preceding but with the darker parts rather more 

 piceous-black and the elytra of a clearer and paler brownish-flavate 

 throughout, the suture and side margin very narrowly piceous, and 

 there is generally only a feeble trace of the inner of the two spots of 

 the preceding species; head similar but with the clypeus more parallel 

 basally and with a more distinct cluster of coarse punctures at the 

 middle of the front; prothorax nearly similar but with the fine sparse 

 punctures usually less distinctly denser laterally and with the basal 

 bead completely obliterated at the middle; elytra much longer, 

 about a fourth longer than wide, rather less (9), the unimpressed 

 series similarly disposed but with the punctures still finer and less 

 dark in tint; legs dark rufous; sterna with abundant long hair. 

 Female much stouter than the male, to a degree not observable in 

 binotata. Male with the outer fine ramus of the larger anterior claw 

 extending somewhat further toward the tip of the lower lobe than in 

 binotata, the claw itself not quite so stout. Length (d 71 ) 10.3-11.3, 



