AMERICAN PniLOSOPHICAL SOCIETY. 479 



Length eleven-twentieths of an inch nearly. 



Carnhus lucublnndus Melsli. Catal. 



Body glabrous, green, polished, beneath black ; head iiupuuc- 

 tured ; antenna) and palpi brown rufous at base, three basal joints 

 of the former with a dusky carina; thorax iuipunotured, widest 

 in the middle, a very little narrowed behind by a regularly 

 curved edge, base nearly as broad as the elytra, basal angles rec- 

 tangular, obtuse, lateral margin very distinctly and abruptly de- 

 pressed, dorsal line acute, hitcral ones, two on each sitle, indent- 

 ed ; elytra green or reddish-purple, margin purplish-opake, in- 

 terstitial lines convex, impunctured, the third with two or three 

 remote punctures, striic purplish within, impunctured ; feet 

 black ish-piceous or rufous. 



Agreeably to M. Latreille's definition of the Purilusoi lioncl- 

 li, this insect probably belongs to that genus : the carina of the 

 antennae is not confined to the third joint, but is extended to 

 the second and first, and is very definite and striking; but the 

 character attributed to that genus of *' thorax [55] narrowed be- 

 hind " is not sufficiently obvious in our insect. Wings perfect. 

 The name PaciUa designates a genus in icthyology. 



37. F. CIIALCITES. — Green, polished, beneath black ; feet 

 black ; head and thorax impunctured, margin of the thorax not 

 depressed. 



Length half an inch. 

 . Carabus chalcites Melsh. Catal. 



Uody glabrous, green, polished, beneath black ; head impunc- 

 tured ; antennae brown, rufous at base, third joint with a black- 

 ish carina; labrum black: palpi piceous ; thorax impunctured, 

 not contracted behind, dorsal line distinct, base as broad as the 

 elytra, bjisal lines two each side, margin not depressed, basal 

 angles rectangular, acute ; scutcl green or cupreous ; elytra pol- 

 ished, green, slightly tinted with cupreous, margin opakc, in^ 

 terstitial lines convex, impunctured, striae within black and 

 with indented lines on each side ; feet black ; tibiae and tar.«i 

 deep piceous. 



Common. Hrought also from the Missouri by Mr. Xuttall. 

 This species belongs to the genus Paci/us of Bonelli. It seem? 

 to resemble the Uarpalus vin'di-aeneus of Palisot, but the thorax 

 1823.] 



