1 38 [August, 



rior margin. Elytra tolerably densely, and more coarsely punctured than the 

 thorax, yellow, with a large common sutural black vitta, which fits to the spot 

 on the thorax, and is gradually narrowed behind, reaching nearly to the tip. 

 Body beneath black, densely and not finely punctured : abdominal plates scarcely 

 shorter tLan the first segment, reaching laterally to the parapleurae. Feet yel- 

 low, thighs a little obscure. 



13. S. s u t u r a 1 i s, rotundato-ovalis, modice convexus, subtilius punctatus, 

 pubescens, niger, capite thorace elytrisque obscure testaceis, illo macula 

 maxima basali, his vitta suturali lateribusque infuscatis, tibiis tarsisque tes- 

 taceis. Long. '08. 



One specimen, Colorado River, California. Closely allied to the last, but is 

 less coarsely punctured. Head testaceous, very finely punctured. Thorax nar- 

 rowed in front, but little rounded on the sides, margined at the base, which is 

 truncate at the scutellum, and very slightly sinuate each side : finely not densely 

 punctured, testaceous, with a very large black spot occupying nearly all the 

 base, and extending almost to the apex. Elytra a little more coarsely punctured 

 than the ,thorax, testaceous, with a common black sutural vitta broad at the 

 base, and gradually narrowed behind, reaching nearly to the apex, sides from 

 the middle to near the apex blackish : epipleurae testaceous. Body beneath 

 black, densely punctured ; abdominal plates shorter than the first segment, 

 hardly extending as far as the parapleurae. Feet piceous, tibiae and tarsi 

 testaceous. 



B. 2 d. 



14. S. fraternus, rotundato-ovalis, convexus, niger, pubescens, capite, 

 thoracis lateribus, pedibusque testaceis, elytris valde punctatis, apice late rufis. 

 Long. '09. 



Middle States. Rounded, a little oval, convex, black shining, covered with 

 fine gray hair. Head and thorax finely punctulate, yellow, the latter with a 

 large basal black spot ; sides rounded, base margined, truncate at the scutellum, 

 and oblique each side. Elytra densely punctured, with a transverse testaceous 

 margin at the apex, which covers about one-fifth of the surface. Body beneath 

 black, densely punctured, abdominal plates shorter than the segment, smooth at 

 the margin, extending as far as the parapleurae. Feet testaceous, margin of the 

 abdomen rufous. 



15. S. h ae m or rh o us, rotundato-ovalis, convexus niger, pubescens, capite 

 thoracis macula laterali, pedibusque testaceis, elytris grosse punctatis, apice 

 late rufis. Long. '09. 



This species is very similar to the last, but the punctures of the elytra are 

 larger and less dense. I have only a single specimen from New York. 



Rounded, slightly oval, convex, black shining, finely pubescent. Head testa- 

 ceous, finely punctulate. Thorax black, with a yellow lateral spot reaching 

 from the anterior margin nearly to the base, which is truncate at the scutellum, 

 and oblique each side, marginal line distinct, sides rounded. Elytra forming a 

 distinct angle with the sides of the thorax, coarsely and not densely punctured, 

 with a broad testaceous apical margin covering about one-fifth of the surface. 

 Body beneath as in the last, but the sides of the venter are scarcely testaceous. 

 Feet testaceous. 



The apical spot is not sufficiently large to permit this species to be referred 

 to S. BrulleiMuls. 934. 



16. S. c hat c has, rotundato-ovalis, convexus, niger punctatus, pubescens, 

 capite thoraceque testaceis, hoc macula basali nigra, elytris margine apicali, 

 ano pedibusque rufo-testaceis. Long. '09. 



Muls. 986. 



Atlantic States and Missouri Territory. Broad oval, convex, black, shining 

 and moderately pubescent. Head and thorax finely punctulate, yellow, the 

 latter with a small basal black spot reaching nearly to the middle ; very much 

 narrowed in front on the sides, base obtuse at the scutellum, oblique each side, 

 marginal line distinct. Elytra somewhat plumbeous, densely but not deeply 



