Horn.] OOO [June 20, 



much finer in the inters'.ria), smooth lines very indistinct, external sub- 

 humeral closer to the marginal and relatively longer, first dorsal as long 

 as the second. 



Var. orbiculatus, Mars. Elytral punctures in the apical region sparse, 

 scarcely extending in the interstri«3, external subhumeral parallel with 

 the marginal and moderately long, first dorsal equal to the second. 



Notwithstanding the remarkably different aspect of the types of Jiin- 

 hriutus and orblculatas, I am compelled to unite them as varieties of one 

 form. I have a large series before me, and every gradation can be de- 

 tected between the forms above indicated. 



Occurs abundantly in California, also in Nevada, Kansas, Arizona, 

 Texas and Lower California. 



S. acilinea, Mars. Mon., 1862, p. 477, pi. 16, fig. 36. 



Oval, convex, piceous, shining, surface slightly bronzed. Headcoarselv 

 sub-rugosely punctulate, frontal stria broadly interrupted at middle. 

 Thorax fimbriate, disc finely and sparsely punctulate, at sides more 

 coarsely, and near the anterior angles more densely, and a narrow space 

 along the basal margin coarsely punctured. Elytra at apical half punc- 

 tured, punctures coarse, more dense and serrate near the tips of the outer 

 strite and extending in the interstrite, and in the outer two to the base ; 

 external subhumer;il short basal, internal feeble, disconnected, oblique 

 humeral svib-obsolete ; first dorsal extending to middle, second longer, 

 third shorter than the first, abbreviated at base, fourth equal to first, 

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

 pygidium densely and rather coarsely punctured. Anterior tibiaj 

 multidenticulate, middle and hind tibiae spinulose. Length .10 inch ; 

 2.5 mm. 



The only difference that I can detect between this and var. desertorura 

 of the preceding species is the abbreviation of the third dorsal at base. 

 The size given by Marseul, is evidently too great, as is shown by the 

 ligure, the measurement above being from the type. 



One specimen is before me (type), collected in the United States (pos- 

 sibly Texas), without definite locality. 



S. ccerulescens, Lee. Ann. Lye. V., p. 169. 



Broadly oval, moderately convex, surface sub-opaque, steel-blue, pro- 

 thoracic eiDipleurae, and legs rufous. Head densely punctured, frontal 

 stria entire. Thorax with margins sj^arsely fimbriate, disc sparsely 

 punctured, punctures gradually becoming more dense to the sides where 

 they are coarser, and almost confluent. Elytra moderately coarsely 

 punctured over the entire surface, punctures less dense in the scutellar 

 and svitural regions, humeral space smoother ; external subhumeral short 

 close to the marginal, internal short apical, humei-al obliterated by punc- 

 tures ; first dorsal extending two-thirds to apex, second slightly longer, 

 3-4 gradually shorter, the latter arching at base, joining the sutural 

 which is entire. Pygidium and propygidium densely and moderately 



