LeConte.] EinRHININI. 179 



This species differs from the next Ijy the stouter form, and the prothorax 

 broader tlian long, more rounded ou the sides, and more strongly con- 

 stricted near the tip. Well preserved specimens are covered Avith a 

 uniform crust of dirty gray scales; tlie middle of the prothorax and the 

 disc of the elytra are most frequently abraded, so as to produce a pattern 

 varying in extent and width. Too much care cannot be exercised in the 

 study of the species of this and the next group, to avoid the deceptive 

 influences of abrasion; the specific determinations should be always made 

 upon form, structure and sculpture, disregarding color and pattern as of 

 small importance. Length 3 mm. ; .12 inch. 



2. O. longulus, n. sp. 



Black, covered with a uniform crust of dirty gray scales, as in the pre- 

 ceding species; antennae testaceous, club fuscous. Prothorax as long as 

 wide, slightly rounded on the sides, feebly constricted in front, very 

 coarsely punctured, punctures barely visible through the scales. Elytra 

 nearly one-half wider than the prothorax; humeri oblique, obtuse; sides 

 parallel for two-thirds the length, then rounded to the tip; stria? well im- 

 pressed, interspaces slightly convex, alternate ones slightly tesselated, 

 without setre. Length 3 mm.; .12 inch. 



One specimen, Michigan; Messrs. Hubbard and Schwarz. Only differs 

 from the preceding by the narrower form, and more coarsely though less 

 distinctly punctured prothorax. 



Without examination of the characters of the group and genus, this 

 species might be readily confounded with Lissorhoptrus simplex. 



3. O. alternans, n. sp. 



Blackish, sparsely setose and covered with a mud colored crust; beak 

 cylindrical, curved, as long as the head and prothorax; the latter wider 

 than long, feebly rounded on the sides, slightly narrowed but not con- 

 stricted in front, coarsely and thickly punctured. Elytra one-third wider, 

 humeri oblique, prominent, disc rather flattened in front; stria? and punc- 

 tures obscured by the crust, alternate interspaces distinctly elevated, and 

 furnished with a row of distant rather long bristles; tibiije rather stout, 

 curved, with a moderate hook at tip; tarsi narrower than in the preceding 

 species, so that the last joint seems to project farther, though it is not really 

 longer. Length 3.5 mm. ; 10 inch. 



Texas; Belfrage; two specimens. 



Group V. Stenopelmi. 



This genus is included by Lacordaire in his group Storeides, but it seeme 

 to me that the remarkable combination of characters requires that it should 

 be received as a separate group, with the following definition : 



Body clothed with a dense crust of scales; beak short and broad, not 

 longer than the head; antennal grooves very short. Antennti? inserted on 

 the upper rather than the lateral surface, scape long, reaching to the back part 

 of the eyes, which are round, and coarsely granulated; funiculus 7-joiuted, 



