552 TRANSACTIONS OF THE 



Body bronzed cupreous, somewhat polished; head greenish each 

 side and before ; an impressed line near the eye, between which 

 and the eye is a dilated puncture ; antennae blackish-green, first 

 joint beneath piceous; palpi black piceous, tinged with green ; 

 thorax rather broader behind than before ; posterior angles acute ; 

 lateral edge excurved behind ; dorsal line distinct, but not deeply 

 impressed, not abbreviated ; basal lines dilated ; elytra with 

 punctured striae, punctures almost obsolete towards the tip; 

 fourth stria not undulated; third interstitial space as broad as 

 the seventh and with two dilated impressed subquadrate spots, 

 green, and including each a puncture, and placed near the mid- 

 dle ; beneath dark green ; feet blackish green ; tibiae and base of 

 the thighs piceous greenish. 



Length less than one-fourth of an inch. 



I obtained this species during the journey of Major Long's 

 party to the Rocky Mountains. It is very distinct from the m- 

 equale Say, which it somewhat resembles by many characters. 

 That of the rectilinear fourth stria of the elytra is an obvious 

 one. 



[Apparently not diiferent from B. i^nnctato- striatum. — Lec] 



11. B. SEMIFASCIATUM. — Greenish -black ; elytra each with 

 four spots ; third interstitial space two-punctured. 



Inhabits Mexico. 



Head metallic green ; two impressed lines between the an- 

 tennae very distinct ; antennje dull piceous ; labrum and palpi 

 blackish ; thorax metallic green with a slight tinge of cupreous ; 

 dorsal line slender ; lateral indentation of the base obvious, 

 bounded near the angle by a carinate, abbreviated line ; lateral 

 edge with a hair rather before the middle, and another at the 

 posterior angle, not arquated from behind the middle to the basal 

 angle; elytra, blackish, with a slight cupreous tinge, with well 

 impressed punctured striae, distinct to the tip ; interstitial lines 

 depressed, plane ; third line with a transverse indentation before 

 the middle and a less distinct one behind the middle ; a dull honey- 

 yellow dot on the middle of the base, a semifascia before the 

 middle, another behind the middle, and an irregular apical spot ; 

 beneath black ; feet piceous. 



Length over three-twentieths of an inch. 



[Vol. IV. 



