ANNALS OF THE LYCEUM. 387 



extended towards the tip, where it gradually approaches the scu- 

 te! ; scutel transverse and transversely carinated ; beneath dark- 

 green, polished on the venter; edge of the postpectus and venter 

 with a dull fulvous line. 



Length seven-twentieths of an inch. 



The quercata Fabr., is described to be green, with a fuscous 

 vitta on the elytra, and a spot on the thorax; it therefore differs 

 [251] from the present insect. The surface of the elytra ap- 

 pears covered with minute imbricated points, which are more 

 acute and obvious towards the tip. 



[This and the three following belong so Agrilus ; B. quercata 

 is totally different, being an Anthaxia. — Lec] 



3. B. ARCUATA. — Dark bronze; elytra black; thorax with an 

 elevated line at the posterior angles. 



Desc. Body slender : head punctured, with a longitudinal in- 

 dented line, and obsolete indentation each side on the front : thorax 

 inequal, transversely confluently punctured ; an elevated, arcuated 

 line, extends from the posterior angle almost to the middle of 

 the lateral margin : scutel transverse and transversely carinated ; 

 elytra indented at base; at tip rounded and denticulated: be- 

 neath dark greenish, polished, particularly on the venter- 

 Length three-tenths of an inch. 



Of a similar form to the preceding species ; but it is altogether 

 destitute of the marginal colored line of the thorax, and those 

 of the elytra ; the elevated line of the thoracic also angles distin- 

 guishes it. The imbrication of the elytra is similar to the pre- 

 ceding species. 



4. B. POLiTA. — Cupreous, polished ; thorax with an elevated 

 line at the posterior angles. 



Desc. Body slender, highly polished, cupreous : head tinged 

 with green, punctured ; longitudinal indented line obsolete : an- 

 tennae blackish : thorax a little inequal ; transversely confluently 

 punctured ; an elevated arcuated line extends from the posterior 

 angles almost to the middle of the lateral margin : scutel trans- 

 verse and transversely carinated : elytra indented at base ; at tip 

 rounded and denticulated. 



Length rather more than one-fifth of an inch. [252] 



Found by Mr. Thomas Nuttall on the bank of the Mississippi 



river. In many of its characters it resembles the arcuata, but is 



