Horn.] 330 rj U ne 20, 



The dorsal strife 1-3 are all hooked at base, or rather have a short pro- 

 cess extending parallel with the base. 



One specimen, Kansas. The pale color may, in part, be due to imma- 

 turity. 



S. eonvexiuseulus, Mars. Mon., 1855, p. 404, pi. 19. fig. 111. 



Black, shining, surface with faint bronze tinge. Head punctulate, 

 supra-orbital stria obsolete, frontal stria visible at the sides. Thorax 

 smooth at middle, with a broad space at sides and very minutely punc- 

 tulate, and at base more coarsely punctured. Elytra very sparsely punc- 

 tured at apical third, punctures extending within the stria? and along the 

 suture in front of middle ; external subhumeral entirely absent, humeral 

 fine, oblique, not joining the short internal subhumeral ; first dorsal ex- 

 tending four-fifths to apex, 2-3-4, gradually and but slightly shorter, the 

 latter arching at base joining the sutural, which is entire, apical marginal 

 line obsolete . Propygidium and pygidium moderately densely punctured. 

 Prosternal stria? divergent, feebly ascending. Legs brownish-red, ante- 

 rior tibia? fine denticulate, middle and posterior finely biseriately spinu- 

 lose. Length .10 inch ; 2.5 mm. 



One specimen from North Carolina, from the collection of the late Dr. 

 Zimmermann. 



S. minutus, Lee. Bost. Journ. V., p. 73, pi. 5, fig. 9; Mars. Mon., is:,.-,, 

 p. 48G, pi. 18, fig. 104. 



Black, with slight tinge of bronze, shining. Head, sparsely punctulate, 

 supra-orbital stria? wanting, frontal stria obsolete at the sides. Thorax 

 smooth at middle, very finely and sparsely punctulate towards the sides. 

 Elytra very sparsely punctulate at the apical third, punctures extending 

 forward along the suture, in front of the middle; external subhumeral stria 

 wanting, oblique humeral moderately impressed, usually continuous with 

 the external subhumeral which extends three-fourths to apex ; first and 

 second dorsals equal extending three-fourths ; third extending slightly 

 beyond middle, and fourth to middle only, joining the sutural which 

 attains the apex, and continued by the apical line to the marginal. Propy- 

 gidium and pygidium sparsely punctured. Legs rufous. Anterior tibiae 

 finely denticulate, middle and hind tibia? finely biseriately spinulose. 

 Prosternal stria? divergent and strongly ascending. Length .08 inch ; 2 mm. 



This species is very closely allied to the preceding, and differs princi- 

 pally in the longer internal subhumeral. The elytral punctures of this 

 species are coarser and much less closely placed than in eon n: viuseulus. 

 In the "Catalogue (Gerara. and Harold) p. 789, this species is placed as 

 synonymous with plenus," which it does not even remotely resemble. 

 Occurs in the Middle States. 



S. scissus,Lec. Ann. Lye. V., p. 168. 



Piceous, shining. Vertex very minutely punctulate, clypeus rugose, 

 supra-orbital stria obsolete, frontal visible at the sides. Thorax with a 



