174 
CHARLES W. LEXO. 
Mesosternum, etc., as in precedin';, also the sexual characters, except the poste- 
rior femora. It is hnt feebly ditferentiated from cuprea, and is rare in collections. 
Length 8 mm. ; .32 inch. Habitat. — Wash., Vane. 
I>. Oiiiargiiiatsi Kirby. Original description. 
“ Body dark bine, clothed underneath with pile, in certain lights glittering 
like silver. Antennfe black, tubercles of the prothorax prominent. Elytra witli 
an ini]iression near the suture, last dorsal segment of the abdomen emarginate. 
thighs very thick, bronzed, posterior one with a stout tooth. This species comes 
very near sericea. hut it is sufficiently distinguished by the deeply notched podex, 
the silver pile that clotiies its body underneath, which in that species has a 
golden lustre.” 
Mesosternum narrower than the coxa; first ventral segment shorter than the 
metasternum ; elytra rounded at tip. the sutural margin strongly sinuate near 
the apex; form convex, moderately elongate, second and third antennal joints 
nearly equal. 
Male, pygidium acutely emarginate. Female, pygidinm elongate, scarcely 
rounded. Posterior femora dentate in both sexes. 
Varies but little from the dark metallic blue described by Kirby, 
but occasional specimens are nearly black. 
Length 6 — 7 mm. , .24 — .28 inch. Habitat. —Vnne., Can., Cal., Wash.. Col., Xeb., 
Pa., Mass., X. H. Abundant. 
I>. inetallica ,\hrens. Dr. LeConte’s description translated. 
“ Elytra subparallel, apex subtruncate or rounded, second and third antennal 
joints subequal, posterior femora but little elongate. Thorax narrowed behind, 
eyes with the orbits not produced. Elytra rather convex, parallel ; apex rounded 
or feebly truncate, posterior femora armed with a tooth. Thorax rather elon- 
gate, less convex. Legs short, jiosterior femora moderately clavate, attenuate at 
base; form subelongate, shining. Head not torose, thorax rugulose, the disc 
smooth on each side, somewhat narrowed behind regularly, anterior angles 
prominent, lateral tubercles scarcely prominent, a deep impressed transverse 
channel before the base. Elytra rugose. Long. .23 — .26. Pa.” 
" Male, antennae longer, femoral tooth distinct. Female, antennae shorter, 
femoral tooth obsolete. Varies metallic golden, green and blackish, also more 
or less rufous.” 
Mesosternum, etc., as in the preceding. Pygidmm, truncate male, elongate and 
rounded female. The difference is not, however, strongly marked. 
Length 5i — 7 mm. ; 22 — .28 inch. Habitat. — X. H., Mass., Pa., Md., X. C., Fla., 
111. Abundant. 
I>. flavipes Kirby. Original description. 
“Body bronzed cojiper with a golden lustre, clothed below with very short, 
somewhat silvery, decumbent hairs, the metallic, splendor of the body being 
visible through them. Head thickly, minutely and confluently punctured or 
wrinkled, channeled between the eyes; antennae testaceous, longer than the 
prothorax; prothorax subquadrangular, longer than usual in the genus, widely 
channeled, very minutely, thickly and confluently punctured and wrinkled, 
anterior tubercles large and not prominent. Elytra with two impressions ad- 
joining the sntnre, elevated at the base; legs testaceous. Latitude 65 .” 
Mesosternum narrower than the coxa; first ventral segment shorter than the 
metasternum ; elytra rounded at apex, the sutural margin distinctly sinuate near 
