AMERICAN COLEOPTERA. 307 



giving my reasons under that genus for the disagreement. I am, how- 

 ever, disposed to go a step further and suppress Amjyhotis, as there does 

 not appear to be any valid reason for retaining it as distinct. 



The antennal groove is beneath the eye which forms its upper 

 limit, the lower or inner limit is formed by a ridge or plate which 

 is nearly continuous with the edge of the mandible. This plate 

 is more perfectly developed in the species heretofore referred to 

 Amphotis, least so in Sorojiia, so that by the partial imperfection 

 of this plate posteriorly the antennal grooves converge posteriorly, 

 while they appear absolutely parallel in Amphotis. This difference 

 affords a means of dividing our species quite naturally. 



Antennal grooves very decidedly convergent posteriorly. 



(Sides of thorax suddenly narrowed at base, the hind angles retracted within 



the humeral angles) grisea. 



Sides of thorax very feebly sinuate at base, the hind angles not retracted, 



the base as wide as the base of the elytra guttulata. 



Antennal grooves parallel. 



Elytra not or merely apparently costate undalata. 



Elytra distinctly costate. 

 Thorax slightly coarctate at base, the explanate margin punctured; lateral 



angles of mentum prominent, acute Ulliei. 



(Thorax broadest at base, hind angles rectangular, the explanate margin 

 smooth; lateral angles of mentum rounded) marginata. 



Two European species are introduced into the table to show the 

 relationship of our species with them. In undulata the antennal 

 grooves are neither exactly parallel nor are they by any means con- 

 vergent, the inner plate of which mention has been made is arcuate, 

 so that if the insect is looked at directly from the front the grooves 

 seem parallel, if from the rear they seem slightly convergent. S. yuttu- 

 lata by its narrower elytral margin approaches Phenolia ; it has the 

 widest distribution of all the species. 



S. gnttulata Lee. — Piceous or somewhat paler, feebly shining, very 

 sparsely pubescent, elongate oval. Head moderately densely finely punctured 

 and with a sinuous impression. Antennae rufous, third joint nearly as long as 

 the two following united, club piceous. Thorax twice as wide as long, broadest 

 at base, apex deeply emarginate, base feebly bisinuate, sides regularly arcuate, 

 posteriorly feebly sinuate, hind angles subacute slightly dentiform, margin 

 broadly explanate, disc moderately convex, a distinct median impression and 

 on each side about four vague fovese, surface moderately densely finely punc- 

 tured to the extreme margin. Elytra at base as broad as the thorax, humeral 

 angles slightly dentiform, margin moderately explanate, slightly reflexed, sur- 

 face less densely and more finely punctured than the thorax, sparsely clothed 

 with brownish pubescence with short pale semierect set£e in rows, distantly 

 placed; color piceous, margin paler, disc with a common sinuous band slightly 



