AMERICAN rniLOSOl'lIlCAL SOCIETT. 443 



Head black, polished; frout minutely corrugated; vertex 

 glabrous ; luouth labrum, and antennae f'erruginou.s or pale tes- 

 taceous ; thorax ferruginous, glabrous, very minutely rugose; a 

 longitudinal impressed line; margin depressed and somewhat 

 ciliated ; angles rounded ; beneath ferruginous ; feet, color of the 

 thorax; seutel color of the thorax; elytra profoundly striate ; 

 striic impunetured ; interstitial lines convex ; marginal line in- 

 terrupted by punctures from the humerus to the apex ; venter 

 Idackish. 



Length about three-tenths of an iiiih. [12] 



Not uncommon in IViuisylvaiiia. Found also by Mr. T. Nut- 

 tall on the ^Missouri. The name of Libina has been more re- 

 cently a]>plied by Cuvier, to designate a genus of fishes. 



2. L. viTTATA. — Ihifous ; elytra black, with a \\liite filUt and 

 yellowish margin ; feet black. 



Length rather more than one-fourth of an inch. 



Winged; thorax orbicular, rufous ; elytra black, with a white vitta. 

 Fabr. Syst. Eleut. 1, p. 202, Mus. D. Yt-ntes. 



Antennae black ; head rufous; soutel small, rufous ; elytra glabrous, 

 shining? bhick with a longitudinal white fillet in the middle ; body ferru- 

 ginous : legs black. Turt. 



Antennae black ; head rufous ; eyes black ; thorax rufcus, hardly broader 

 thau the head ; seutel rufous ; elytra black, slightly striated : exterior 

 margin and triangular spot around the seutel rufous; a longitudinal 

 white line on each ; beneath fulvous; feet black with half of the thighs 

 rufous. (Length of figure one-fourth of an inch.) Oliv. 3, p. 98, pi, 6, 

 fig. 69, a, b. 



Body impunctured, nearly destitute of hairs ; head rufous ; 

 antennae black-brown, rufous at base ; palpi black ; trunk rufous, 

 glabrous; thorax with an impressed longitudinal line; elytra 

 with acute distant strijc ; two parallel black vittjK?, — the outer one 

 originating on the humerus and abbreviated near the middle of 

 the tip, — inner one originating at the middle of the base, becomes 

 common before the middle of the suture, and is abbreviated near 

 the inner angle of the tip ; an elongated common whitish triangle 

 at base, a white vitta on the middle, and a pale rufous margin 

 and tip; feet black; nails pectinated; coxae rufous; venter ru- 

 fous. 



Var. «. Color of the outer margin extended round the base to 

 1823.] 



