OP PHILADELPHIA. 189 



2. S. PUNCTicoLLis. — Yellow; beneath plumbeous; elytra 

 black, with a yellow margin and suture. 



Inhabits Arkansa. 



Body covered with bright yellow, crowded, short, prostrate 

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

 antennte 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 Arkansa. 



[Afterwards described as /S'. trigeminata Randall. — Lec] 



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 piceous; 

 antennae rather shorter than the body : thorax cylindric, diameters 

 nearly equal ; 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 Ohcrea. — Leg.] 



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

 tennee annulate; elytra entire. 



Inhabits Missouri. 



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

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

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

 nulate, with cinereous and black : thorax cylindric, diameters 

 subequal : 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 oculaticollis, and it is also a more robust 

 species ; it is, however, still more closely allied to the *S'. pergrata, 

 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 obtuse 

 1823.] 



