April, 1844.] 49 



Elytra bluish-black, punctured ; interstices of the costs narrow at the bottom. 

 Inhabits Georgia. (Common.) 



Resembles both the fumans, Fabr., and Vibrator, He].; but the thorax is nar- 

 rower and more rounded anteriorly than the former, and less so than the latter. 

 The head is larger and the frontal impressions broader than in either ; the anten- 

 na? are thicker and darker than in the fumans, but want the dark spots observable 

 on those of the librator. The elytra are wider, the interstices are deeper than 

 in either, and wider than in the fumans. 



5. Brachinus Le Contei. Dej. Cat. Length 6 lines ; breadth 2|- lines. 

 Inhabits Georgia. 



Resembles the viridlpennis, Dej., and perplexus, Dej.; the former in size and 

 form, the latter in form, but is easily distinguished by the frontal impressions, 

 which are shallow and punctate ; in the viridipennis they are still shallower and 

 more punctate : in the perplexus they are rugous ; the first two joints of the 

 antennas and base of third and fourth, are ferruginous ; tips of these last are 

 brown ; in both the remainder is brown, but in the perplexus the third only is 

 brown at the tip. The thorax is wider before ; the anterior angles are sharper 

 and more projecting. Elytra deep blue to blackish blue. Abdomen deep reddish 

 brown. 



6. Brachinus cyanopterus. Dej. MS. Length 5§ lines ; breadth 2f 

 lines. Inhabits New York. 



Resembles the cordicollis, but is larger, and easily distinguished by the deeper 

 and brighter blue of the elytra: the antenna? are likewise ferruginous, without 

 spots, growing darker towards the extremity. The thorax is rather narrower 

 anteriorly, and the costse of the elytra are more apparent. Abdomen red, sides 

 brownish. 



7. Brachinus viridis. Nob. Length 6 lines ; breadth 2J lines. Inhabits 

 Georgia. 



Resembles the viridipennis, but is narrower ; the thorax is not so much 

 rounded on the sides, the basal impressions are more distinct. The elytra are 

 of a paler and brighter green, more thickly and coarsely punctured ; the costa? 

 are more strongly marked. The first two joints of the antenna? and a spot on 

 the third are ferruginous; in the viridipennis the first three and sometimes 

 the four are ferruginous, with a small brown spot on the third and fourth. 



8. Brachinus neglectus. Nob. Length 5J lines ; breadth 2£ lines. 

 Inhabits Georgia. 



Somewhat resembles the quadripennis, but is larger and proportionably 

 broader ; the elytra are of the same bluish-black colour, but less rounded at the 

 anterior angles, they are more distinctly costate, and the intervals are nar- 

 rower. The first two joints of the antenna? are ferruginous, and the rest brown, 

 whilst in the quadripennis the base of the third is also ferruginous. The thorax 

 is also more retracted posteriorly, and the anterior angles more acute ; the basal 

 impressions are prolonged and extend almost to the middle of the thorax. 



9. Brachinus tenuicollis. Nob. Length 6 lines ; breadth 2| lines. 



