1873.] "J 4:0 [Horn. 



joining the humeral, and broadly interrupted at its middle ; first dorsal 

 extending to middle, second and third longer, fourth equal to the first, 

 arching at base, joining the sutural which is entire. Pygidium and pro- 

 pygidium coarsely but sparsely punctured. Anterior tibiae as in the 

 preceding species, hind tibi;B densely and irregularly spiuulose on the 

 outer face. Length .12-. 16 inch ; 3-4 mm. 



Occurs on the sea-coast of the Middle States region. 



The two synonyms by Marseul, refer to the same insect, which is 

 the nearly totally black form, which was given him as having come from 

 the Rocky Mountains. 



S. gaudens, Lee. Ann. Lye. V., p. 165. 



Oblong oval, black, shining, with slight tinge of bronze. Head dis- 

 tinctly, margined front smooth without chevron. Thorax smooth with 

 very narrow space of punctures along the base. Elytra sparsely and 

 moderately coarsely punctured at apex, punctures extending in front of 

 middle ; external subhumeral very close to the marginal, humeral moder- 

 ^ately long, internal subhumeral short, disconnected ; first dorsal extend- 

 ing slightly beyond the middle, second very nearly as long, third very 

 short, fourth one-third the length of the elytra, arched at base, joining 

 the sutural which is entire and deeply impressed. Pygidium sparsely 

 and rather coarsely punctured. Tibiaj as in the i^receding species, but 

 with the first two teeth very close and the third more distant. Length 

 .12 inch ; 3 mm. 



Occurs on the California sea-coast, but is rare. 



S. serrulatus, Lee. Ann. Lye. V., p. 165. 



Black, moderately shining, elytra brownish opaque. Head margined, 

 front smooth, chevron feebly marked. Thorax smooth, sparsely punc- 

 tured along the basal margin. Elytra very coarsely but not densely 

 punctured over the entire surface, except a narrow space extending from 

 the humerus along the outer side of the first dorsal stria ; external sub- 

 humeral distinct, humeral finely impressed, internal subhumeral discon- 

 nected, short ; fii'st dorsal extending to middle, second and third 

 slightly longer, fourth shorter than the first, arching at base, joining the 

 sutural which is entire. Pygidium and propygidium coarsely and moder- 

 ately densely punctured. Anterior tibiae 7-8-denticulate and more finely 

 than usual in the group ; hind tibiae densely clothed with short stout 

 spinules. Length .14 inch ; 3.5 mm. 



Occurs on the sea-coast at San Diego. 



S. siilcifrons, Mann. Bull. Mosc. 1843, IL, p. 259 ; Mars.Mon., 1856, 

 p. 101, p,l. 3, No. 34, fig. 2. 



Form lobust, black, subopaque. Head distinctly margined, front with 

 a feeble chevron. Thorax smooth, very convex, with a narrow line of 

 punctures at base, marginal stria advancing along the base, and deeply 

 impressed to the middle of each elytron. Elytra densely and coarsely 

 punctured with smoother spaces at humerus, outer apical angle and 



A. p. S. — VOL. XIII. 2r 



