136 [August, 



face black, tibiae and tarsi very obscurely rufo-piceous. Abdominal plates shorter 

 than the first segment of the abdomen. 



S. (D io m u s) m yr m id o n Muls. 954, seems to be allied to this species, 

 but the yellow feet, testaceous apex of the elytra, and shorter abdominal plates, 

 at once distinguish it. 



3. S. guttulatus, rotundatus, convexus, niger nitidus, punctulatus, pubes- 

 cens, elytris gutta parva utrinque ad medium, alterisque duabus pone medium 

 rufis. Long. '08. 



Two specimen?, San Francisco, California. Slightly oval rounded, and 'con- 

 vex, black, finely punctulate, tolerably densely pubescent. Thorax som what 

 narrowed in front, very slightly rounded on the sides, not margined at the base, 

 which is scarcely sinuate. Elytra more distinctly punctured than the thorax, 

 marked with a small round red spot at the middle about the internal third of the 

 breadth, and two others placed transversely about two sevenths from the apex, 

 of which the exterior is the larger and slightly oblique. Under surface entirely 

 black. Abdominal plates a little shorter than the first joint of the abdomen. 



4. S. f la V if TO n s. rotundatus, convexus, niger, punctatus, breviter pubes- 

 cens, elytris macula utrinque pone medium, ore tibiis tarsisque flavis. Long. '08. 



Melsheimer, Pr. Acad. Nat. Sc. 3, 181. 



New York and Pennsylvania, rare. Rounded, convex, black shining, distinctly 

 punctured, covered with fine gray hair; mouth and its organs yellow. Thorax 

 narrowed in front, scarcely rounded on the sides, finely margined at the base, 

 which is truncate in front of the scutellum, and obliquely sinuous each side. 

 Elytra with a large round yellow spot at the posterior third, and equidistant from 

 the side and suture. Body beneath entirely black, tibiae and tarsi yellow. Ab- 

 dominal plates shorter than the first segment; their posterior margin is parallel 

 with the margin of the segment, and reaches the side as in the preceding 

 species. 



5. S. bioculatus, rotundato-ovalis convexus, niger punctatus, cinereo- 

 pubescens, elytrorum gutta pone medium, tibiis tarsisque flavis. Long. '07. 



Muls. 960. 



Georgia, rare. This species exactly resembles the last, but it is smaller and 

 more oval, the elytra being a little narrowed behind, and not so regularly rounded 

 on the sides, as in S. flavifrons. The punctures of the elytra are somewhat 

 larger. In one specimen the head is testaceous, in the other it is black, but both 

 are females. 



A. b. 



6. S. term ina tu s , subrotundatus, convexus, niger nitidus, punctatus, sub- 

 tiliter pubescens, capite, thoracis abdominisque lateribus pedibusque testaceis, 

 elytris apice late flavis. Long. "075. 



Say, Bost. Journ. Nat. Hist. 1, 203: Muls. 952. 



Pennsylvania, Georgia. Rounded, slightly oval, convex, black and shining, 

 covered with very fine gray hair. Head testaceous; thorax finely and closely 

 punctured, narrowed in front, but litte rounded on the sides, base rounded, finely 

 margined, scarcely at all sinuous, sides narrowly margined with testaceous. 

 Elytra more coarsely punctured, apex with a large yellow spot occupying about 

 one-fifth of the length, and having its anterior boundary slightly convex. Beneath 

 black, abdomen testaceous, black at base ; feet yellowish; the abdominal plates 

 extend to the posterior margin of the segment. 



Varies with the sides of the thorax widely testaceous, and the apex narrowly 

 margined with the same color. 



Allied to this species is S. x a n t h a s p i s Muls. 952, from Florida, which is 

 afterwards (p. 1101) coHsidered as a variety of S. oc hroderu s; its yellow 

 thorax will at once distinguish it. 



7. S. f em o r a I i s , subrotundatus, convexus, niger nitidus, punctatus subtiliter 

 pubescpns, capite thoracis lateribus, elytrorum apice lata testaceis, tibiis tarsis- 

 que piceis. Long. '075. 



One specimen, New York. Very similar to the last. The thorax is a little 



