OF PHILADELPHIA. 199 



The variety may prove to be a distinct species, bearing a similar 

 relation to jyroxima that the tesfacea of Linne does to the 

 tomentosa. 



8. L. LINEOLA. — Black ; elytra punctured ; suture, margin and 

 vitta, black. 



Inhabits the United States. 



Leptura llneola Knoch in Melsh. Catal. 



Body black, sericeous : antennas, excepting the three basal 

 joints, annulate, with black and yellowish : trophi yellowish : 

 thorax, posterior angles prominent, acute : elytra punctured ; 

 suture, exterior margin, tip, and an abbreviated vitta, black ; tip 

 truncato-emarginate : feet pale testaceous : tarsi blackish : abdo- 

 men dark reddish-brown, sericeous. 



Length two-fifths to nine-twentieths of an inch. 



This is an inhabitant of various parts of the United States. It 

 is found in Pennsylvania, and on the Mississippi, though I have 

 not observed it to be common any where. 



9. L. RUFICOLLIS. — Black; thorax rufous; labrum pale. 

 Inhabits Kentucky. 



L. collaris Melsh. Catal. 



Body black, with very short hairs : antennae, basal joint dull 

 rufous : labrum and mouth pale rufous : thorax I'ufous, subglo- 

 bose in the middle, and with a flattened, anterior, and posterior 

 margin : elytra not tapering, confluently punctured, [422] black, 

 entire at tip : beneath sericeous : feet varied with testaceous. 



Length less than three-tenths of an inch. 



In the distribution of colors it approaches L. thoracica Fab., but 

 is a much smaller species. It is also very diiferent from the col- 

 laris Linn, of Europe, in being smaller and of a more slender 

 form. 



RHAGIU3I Fabr. 



1. R. TRiviTTATUM. — Black ; elytra with black suture, yel- 

 low vitta, black central line, and rufous margin. 



Inhabits Mississippi. 



Head black : clypeus, mouth and antennae rufous : thorax 

 uneven, very little narrowed before ; an anterior and posterior 

 impressed band, and a dorsal, impressed line : scutel black : ely- 

 tra hardly emarginated; humerus prominent; suture black, 

 1824.] 



