388 MEMOIRS ON THE COLEOPTERA 



close-set; hind tarsi (cf ) barely twice as long as the tibiae. Length 

 (cf) 7.25 mm.; width 3.6 mm. New York parvulus n. sp. 



II Punctuation of the elytra in great part strong and dense, but with 

 the less punctate intervals not at all costuliform, flat, the flanks 

 without trace of transverse tomentose spots and the pygidium with 

 coarse and conspicuous, though not very long, ashy hairs. Body pale 

 metallic-green in color, the eltyra evenly testaceous, with thin green 

 superficial lustre; abdomen not paler, the legs green; head and pro- 

 notum with dense, the elytra with rather less dense and shorter, erect 

 cinereous hairs; clypeal lobes gradually rather strongly reflexed, the 

 sinus deep; prothorax slightly elongate (cf), or somewhat transverse 

 and more parallel (9 ), the sides oblique at apex as usual, the punc- 

 tures rather small but deep and very close-set throughout; cretaceous 

 spots wholly wanting; scutellum elongate, with rather wide smooth 

 margins, the hairs arising from the dense punctures very coarse as 

 usual; elytra but slightly shorter than wide, widest but not at all 

 abruptly inflated near basal third; pygidium similar in shape and 

 convexity in the sexes, with very close-set, deep and sharply crenulate 

 Jines and coarse pubescence, that of the female peculiar in having a 

 large rounded subapical concavity, which is more densely and 

 coarsely pubescent than the rest of the surface, the apex rounded, 

 only broadly and feebly sinuate at the sides. Male larger and stouter 

 than the female as a rule, the anterior tibiae slender, with the two 

 teeth small and approximate, the hind tarsi twice as long as the tibiae. 

 Female with the antennal club shorter, the anterior tibiae shorter 

 and wider, with the two teeth much longer, very acute and relatively 

 less approximate, the hind tarsi only slightly more slender, two-thirds 

 longer than the tibiae. Length (cf 9 ) 10.8-12.0 mm.; width 5.2-6.3 

 mm. Pennsylvania to North Carolina. Fifteen examples. [Trichius 

 bibens Fabr. ; bidens Oliv.] bibens Fabr. 



Punctuation of the elytra sparse, sometimes slightly closer on the alter- 

 nate intervals, the costulation similarly obsolete or very feeble; 

 flanks with two tomentose spots; pygidium (9) with an abruptly 

 produced subtruncate lobe at apex, the surface flattened apically but 

 not impressed and, throughout, with the transverse wavy crenulate 

 incised lines widely separated, the surface glabrous or nearly so in 

 both sexes 1 2 



12 Body deep and brilliant metallic green in color throughout, rather 

 stout, very shining, the elytra, as in bibens, without trace of the 

 opaque lateral areas of the piger section; pubescence of the upper 

 surface moderately long, not very conspicuous, longer and coarser 

 on the scutellum and neighboring parts of the elytra; head and pro- 

 thorax with small and deep but only moderately close-set punctures, 

 evenly disposed almost throughout, without trace of tomentose 

 spots, the head with a broad V-shaped punctureless callus on the 

 vertex, the clypeus nearly flat, the lobes gradually and very feebly 

 inclining upward, rounded, the sinus very moderate; prothorax 

 rather large, nearly as long as wide (cf ), slightly transverse (9 ), the 

 sides more converging from the base in the former, oblique at apex; 

 median line feebly and indefinitely impressed; scutellum with the 



