302 GEO. H. HORN, M. D. 



carina. Eyes oval, finely granulated. Thorax quadrangular. Scutellum oval, 

 acute at tip. Elytra subcylindrical, slightly narrowed at tip. Femora stout, tibiae 

 not arcuate, but slightly flattened. Tarsi dilated, densely pubescent beneath, 

 first joint triangular, as large as the second, second feebly emarginate, third deeply 

 bilobed, fourth nearly half projecting beyond the third, with rather stout, moder- 

 ately arcuate divaricate claws. Metasternal episterna very narrow at middle. 



Two species occur in our fauna. 



Black with a slight bronze tinge metal 1 ica. 



Black with slight bluish tinge, thorax red collaris. 



S. metallica Fab. — Subcylindrical, elongate, black, shining, with slight 

 bronze tinge. Thorax a little longer than wide, sides at anterior angles feebly 

 arcuate, posteriorly straight, with a very feeble trace of sinuation, surface very 

 sparsely punctate. Elytra with ten rows of moderately fine punctures and a short 

 scutellar row. Body beneath shining, very sparsely punctate. Length .20-. 24 

 inch ; 5—6 millim. 



Occurs from the New England States to Texas. 



S. collaris Baly. — Subcylindrical, elongate, black, with slight bluish tinge, 

 thorax red. Thorax quadrate, sides at anterior angles feebly arcuate, posteriorly 

 straight and parallel, surface sparsely punctate. Elytra as in metallica. Body 

 beneath black, sparsely punctate. Length .26 inch ; 6.5 millim. 



This species is somewhat stouter in appearance than the preceding, 



and differs in form of thorax and different color. 



Occurs from Michigan to Texas. 



Bibliography and Synonymy. 



MICRORHOPALA Baly. 

 M. vittata Fab., Ent. Syst. Suppl. p. 117 ; Oliv. Ent. vi, p. 770, No. 95, pi. ii, fig. 

 20 ; Crotch, Proc. Acad, 1873, p. 82. 

 laetula Lee, Col. Kans. 1859, p. 27. 

 M. dimidiata n. sp. 



M. Xerene Newm., Ent. Mag. v, 1838, p. 390 ; Baly, Ann. Nat. Hist. 1864, p. 269 ; 

 Crotch, loc. cit. p. 82. 

 interrupta Couper, Can. Nat. 1865, p. 63. 

 M. rubrolineata Mann., Bull. Mosc. 1843, ii, p. 307; Crotch, loe. cit. p. S2. 



signaticollis Lee, Proc. Acad. 1859, p. 82. 

 M. vulnerata n. sp. 



M. floridana Schwarz, Proc. Am. Philos. Soc. 1878, p. 369. 

 M. Erebus Newm., Entomologist, 1841, p. 77. 



M. excavata Oliv.. Ent. vi, p. 775, No. 95, pi. ii. fig. 29; Crotch, Proc. Acad- 1st;. 

 p. 83. 

 Pluto Newm., Entom. 1841, p. 77. 



