NORTH AMERICAN COLEOPTERA. 31 



Elytra distinctly l)lue, the first interval without setiaerous punctures, the third 

 and fifth with about ei^ht placed from the base to apex, seventh interval without, 

 ninth with five or six in its apical half. Legs and coxse pale reddish-yellow. 

 Length .28 — .37 inch ; 7 — 9.5 mm. 



The auteniife are not quite half the length of the body, the ter- 

 minal joint in the male equal to five preceding and in the female to 

 three and a half. 



Occurs in the southeastern Atlantic region, Florida, Georgia and 

 Alabama. 



S. gagatiiia Mels., Proc. Acad. 1845, p. 311.— Piceous shining, elytra with 

 faint tnetallic lustre. Antennae brown. Head sparsely punctate. Thorax very 

 feebly shining, the surface finely alntaceous, the punctuation indistinct, except 

 that in a few specimens some larger punctures are seen near the base. Elytra 

 moderately deeply striate, the striae finely crenately punctured, intervals slightly 

 convex, the first without setigerous jtunctures. the third and fifth with very few, 

 seventh without any as also the ninth, a few close to the margin near the apex. 

 Body beneath almost perfectly smooth. Length .25 — .31 inch ; 6.5 --8 mm. 



The specimens from the Middle States region are moderately shin- 

 ing and with quite distinct metallic lustre of surface. Three from 

 Texas are distinctly less shining. 



In the antennae of the males of the northern form the terminal 

 joint is about equal to five preceding joints, while in the Texas form 

 it is fully equal to six. In the females of both the last joint equals 

 the three preceding. These seem to be probably local varieties, at 

 all events having but one % of the Texas form, it is not possible to 

 say if the variation is constant. In this species the legs are uniform 

 in color, in the fully developed specimens piceous, varying to piceo- 

 testaceous in the less mature forms. 



Ill the specimens ct)llected by Mr. Ulke, near Washington, the 

 thorax is very often quite pale, contrasting very decidedly with the 

 color of the elytra, but there is never that reddish-yellow seen in 

 resjilendens and croceicol/is, nor are the elytra ever of the bright me- 

 tallic lustre. 



Occurs from the Middle States to Texas. 



S. basalis n. sp. — Piceous, shining, elytra with distinct metallic blue lustre, 

 legs piceous, the femora at base and coxae testaceous. Antennae brown. Head 

 with very few punctures, eyes large aud very convex, the posterior canthus very 

 small. Thorax not longer than wide, sides feebly arcuate, base slightly explan- 

 ate, disc very shining, the punctures small, but distinct. Elytra moderately 

 deeply striate, the striae crenately punctured, intervals slightly convex, the first 

 without setigerous punctures, third and fifth with very few, seventh and ninth 

 without any, a few close to the margin near the apex. Body beneath smooth, 

 shining. Length .30 — .40 inch ; 7.5 — 10 mm. 



