SYNONYMS. 



Cychrus unicolor. Knock neue beytriige, p. 



187, tab. 8, fig. 1. 

 Nobis. Trans. Amer. Philos. Soc. vol. ii. new 



series, p. 71. 

 Cychrus viduus. Dejean, Spec. Gen. Coleqp. 



vol. ii. p. 12, No. 9. 



DESCRIPTION. 



Head black, with a slight blue tinge : antennae 

 brown at tip : thorax blackish-blue, disk a little 

 convex, and with an impressed line; lateral 

 margins reflected; widest rather before the 

 middle, and narrowed behind; posterior angles 

 rounded: elytra bright coppery-violaceous, or 

 dark purplish, with numerous striae, in which 

 are dilated, confluent punctures: beneath black. 



OBSERVATIONS 



Probably the largest species of the genus, 

 and is by no means common. The specimen 

 from which the above description, and the 

 annexed figure were taken, was presented to 

 me by Mr. William Hyde of Philadelphia, who 



PLATE 45. 



