AMERICAN PUILOSOPniCAL SOCIETY. 495 



Body black, glabrous, depressed; head with two obsolete picc- 

 ous spots on the vertex; luuuth piceous; palpi paler at base; 

 aiitoniiiE rufous, base paler ; labium elongated, nearly as lung a.« 

 the labruni, bisetous near the tip; thorax uiuch abbreviated, a.i 

 broad as the elytra, much contracted behind, exterior and pos- 

 terior margins depressed, [79] lateral edge reflected, dorsal line 

 conspicuous, posterior angles acute; elytra profoundly striated, 

 striic punctured on the sides, interstitial lines convex ; pectus 

 and postpcctus with obsolete dilated punctures; feet testaceous: 

 venter piceous towards the tip, impunctured. 



Tn this species theeniargina of the anterior tibia is very small 

 and ])laced very near to the tip, so as to be undiscovcrable but 

 by particular examination. Judging from the generic definition 

 which authors have given, this species must differ from the 

 other species of this genus in the form of the labium, which is 

 elongated, acute, as in Pogonnphorus, and has on each side near 

 the tip a long hair or bristle, instead of spines, as in the latter 

 genus ; it does not therefore agree with the cliaraeter given of 

 the labium oi Nclnia, — " labium subquadrate," " labium short," 

 *' nearly quadrate," &c., nor yet with that of PiKjonophorus, of 

 which this part is tricu.spidatc. But as it will not agree with 

 any other than the two genera above mentioned, and as it differs 

 from the latter genus in not liaving the mandibles dilated at base, 

 nor the maxillary palpi much elongated, 1 have thought proper to 

 place it with the present genus, to which it seems to have the 

 closest affinity. 



OMOPIIRON Latr. 



Tongue very sliort ; antennae filiform ; maxillae ciliated on the 

 exterior side; body short, nearly hemispherical; thorax trapc- 

 y.oidal, transverse, siuuated, or lobcd behind ; anterior pair of 

 tibiiv slightly emarginate on the inner side. 



C). LAiUATLM. — Blackish; labrum, margin of the thorax and 

 <»f the elytra whitish : antenna:, palpi, and feet testjiceous. 



Length one-fourth of an inch. [80] 



Scolytfs labiatus nigcr, laLio thoracis clytrorumqiie marginc argenteis. 

 Fabr. Syst. Eleut. 1, p. 24S. 



Head blackish, base punctured ; eyes large ; nasus triangular, 



1823.] 



