1873.] '^"iJ- [Horn. 



figure, by Marseul. The type is before me through the kindness of M. 

 Marseul. 

 Occurs iu Texas. 



S. fraternus, Say. Journ. Acad., 1823, V., p. 40 ; Lee. Bost. Journ. 

 V., p. 77, pi. 6, fig. 4 ; Mars. Mon., 18.55, p. 701, pi. 19, fig. 140. 



Broadly oval, convex, black, aeneous, subopaque. Head flat, front 

 rugose at middle, and with two obsolete chevrons, stria entire. Thorax 

 moderately densely punctured, punctures at the sides somewhat strigose < 

 discal broad triangular space nearly smooth. Elytra densely punctured 

 and opaque with a well-defined small scutellar mirror usually limited at 

 the sides by the fourth dorsal ; external subhumeral stria obsolete, inter- 

 nal entire, oblique humeral fine ; first dorsal long, curved at tip, 2-3-4 

 extending nearly to the middle, and gradually shorter, fourth arching at 

 base, joining the sutural which is entire, rarely somewhat confused at 

 tip. Pygidium and progygidium very densely punctured. Anterior 

 tibia? 7-8 denticulate, middle and hind tibiae spinulose. Length .14 inch ; 

 3.5 mm. 



Occurs on the Atlantic and Lake shores, abundant. 



S. mancus, Say. Journ. Acad., 1823, V., p. 40 ; Mars. Mon., 1855, p. 

 706, pi. 19, fig. 143. 



Broadly oval, convex, black, aeneous, subopaque. Head flat, front 

 coarsely punctured, and with a single chevron limiting a smooth trian- 

 gular space, stria entire. Thorax moderately densely punctured ; punc- 

 tures denser and strigose in front, and at the sides, less dense and finer 

 on the posterior portion of the disc. Elytra densely punctured, punc- 

 tures strigose, scutellar mirror not well defined ; external subhumeral 

 short, close to the marginal, internal long, nearly joining the fine oblique 

 humeral ; first dorsal long arcuate at tip, 2-3-4 attaining the middle, 

 successively slightly shorter, fourth arching at base, joining the sutural 

 which extends to middle, its apical portion, and also the apical marginal 

 stria obliterated. Pygidium and propygidium densely punctured. An- 

 terior tibia} six-denticulate, middle and hind tibiae spinulose. Length 

 .10-.14 inch ; 2.5-3.5 mm. 



Closely allied to the preceding species, but readily distinguished by the 

 characters above given. The scutellar mirror varies in extent as well as 

 in degree of definition, and in some specimens is almost entirely obliter- 

 ated by strigosity. 



Occurs in the Northern States and Canada. 



S. bigemmeus, Lee. Ann. Lye. V., p. 169 ; Mars. Mon., 1855, p. 707, 

 pi. 19, fig. 144. 



Surface distinctly bronzed. Head margined anteriorly, front rugoso- 

 punctate. Thorax broadly punctured at the sides and in front, and more 

 coarsely punctured along the base. Elytra densely strigoso-aciculate, 

 opaque, mirrror small, well defined ; external subhumeral very short, basal 



