OF PHILADELPHIA. 1^9 



2. S. PUNCTICOLLIS. — Yellow; beneuth plumbeous; elytra 

 black, with a yellow margin and suture. 



Inhabits Arkanna. 



Body covered with bright yellow, crowded, short, prostrate 

 hair : head with a black, frontal dot, and another upon the vertex : 

 antennae as long as the body, black : thorax with four black, 

 equal spots above, and one each side : elytra black and punctured 

 upon the disk ; exterior margin, tip, and suture with an equal 

 line of dense yellow hair; tip entire : beneath plumbeous. 



Length seven-twentieths of an inch. 



A very pretty insect, of which but a single specimen was found 

 by Mr. T. Nuttall on the Arkausa. 



[Afterwards described as S. trigcminata Randall. — Leg.] 



3. S. OCULATICOLLIS. — Black, covered with cinereous hair : 

 elytra truncate at tip. 



Inhabits Missouri. 



Body black, immaculate, cylindrical, covered with short pros- 

 trate hair, which partially conceals the punctures: palpi piccous; 

 antennae rather shorter than the body : thorax cylindric, diameters 

 nearly etjual ; two small glabrous spots on the disk, and an obso- 

 lete, glabrous, longitudinal line; elytra truncate at tip. 



Length nine-twentieths of an inch. 



[Belongs to Obcna. — Lec] 



4. S. INORNATA. — Black, covered with cinereous hair ; an- 

 tennae annulate; elytra entire. 



Inhabits Missouri. 



Body black, immaculate, cylindrical, covered with short, pros- 

 trate hair, which conceals the punctures: palpi black : antennas 

 rather shorter than the body, and, excepting the basal joints, an- 

 nulate, with cinereous and black : thorax cylindric, diameters 

 Hubequal : elytra entire and subacute at tip, which is equally at- 

 tenuated from the suture and exterior margins. 



Length less than nine-twentieths of an inch. 



The entire termination of the elytra sufficiently distinguishes 

 this species from the orulaticoUis, and it is also a more robust 

 species ; it is, however, still more closely allied to the S. pcrgrrata, 

 but in addition to the difference in the color of the femur, and 

 that of the margins of the elytra, the elytra are much less obtUiC 

 1823.] 



