190 ACADEMY OF NATURAL SCIENCES 



at tip, and the thorax is entirely destitute of glabrous spots. It 

 cannot be the cinerea Oliv., as the antennae of that insect are de- 

 scribed to be as long again as the body. 



[I have not identified this insect. — Lec] 



5. S. PERGRATA. — Black, covered with cinereous hair; an- 

 tennae annulate ; elytra entire ; thorax with small glabrous spots. 



Inhabits Missouri. 



Body black, covered with short, prostrate hair, which partially 

 conceals the punctures: antennae nearly as long as the body, an- 

 nulate, with cinereous and black : thorax slightly dilated in the 

 [408] middle; a transverse, arquated series of four glabrous 

 spots, and a longitudinal, abbreviated, glabrous line behind the 

 middle : scutel whitish : elytra with a narrow white margin and 

 suture ; tip entire : thighs dull rufous. 



Length about nine-twentieths of an inch. 



Upon the middle of each elytron is a very indistinct, rufous 

 line, which is only visible upon close inspection, and is very 

 probably often wanting; a similar spot is upon the anterior por- 

 tion of the thorax; the white appearance of the margin of the 

 elytra is occasioned by the more dense disposition of the hairs on 

 that part. We captured but a single specimen on the Platte 

 river (Nebraska) near the mountains. 

 [Belongs to Stenostola. — Lec] 



6. S. CALCARATA. — Reddish-brown, covered with cinereous 

 and yellow hair; elytra mucronate at tip. 



Inhabits Missouri Territory. 



Body clothed with dense, prostrate, cinereous hair, varied with 

 yellow or somewhat ferruginous hair : front, a geminate line on 

 the vertex and lateral line, yellow : antennae cinereous, longer 

 than the body : thorax trilineate with yellow : scutel yellow, 

 sub-emarginate behind : elytra cinereous, varied with yellow-fer- 

 ruginous lines and spots ; numerous small glabrous punctures ; 

 tip mucronate in the middle ; humerus rather prominent. 



Length nearly nine-tenths of an inch. 



Closely related to S. mutica. [409] 



7. S. BiviTTATA. — Hoary ; above light brown, with two broad 

 white fillets. 



Inhabits the United States. 



[Vol. III. 



