an impressed line: thorax densely punctured; 

 anterior and lateral margins yellow, tinged with 

 rufous ; a yellow abbreviated line commences at 

 the middle of the anterior margin, and termi- 

 nates at the middle of the disk; two distant 

 yellow abbreviated lines arise from the basal 

 margin, and terminate each side of the middle 

 of the disk: scutel black: elytra yellow, with 

 striae of impressed punctures ; two dilated black 

 vittae, of which one originates on the humerus, 

 and does not reach the tip, the other is rather 

 shorter, originating midway between the preced- 

 ing and the scutel, and hardly approaching the 

 suture at its tip ; suture black : anal segment 

 whitish : beneath black : feet rufous. 



OBSERVATIONS. 



I obtained the specimen from which this de- 

 scription and the figure were taken, on the bank 

 of the Mississippi river, above the confluence of 

 the Ohio. Some doubts may reasonably be 

 entertained, respecting the identity of this insect 

 and the viduatus of Fabricius, on account of its 

 smaller size, and the character of " pedibus varie- 

 gatus," attributed to his insect by that author. 

 But as the present specimen corresponds with 



PLATE XXVIII. 



