AMERICAN PHILOSOPHICAL SOCIETY. 535 



impressions between the eyes rather deep ; thorax rather short, 

 wider than long, subquadrate, impunctured ; lateral edge regu- 

 larly curved ; margin slightly elevated, narrow, broader towards 

 the posterior angles ; dorsal and anterior lines distinct ; posterior 

 lines dilated, suborbicular, slightly rugous ; posterior angles very 

 obtuse ; anterior and posterior margins subequally broad ; elytra 

 with acutely impressed strise, regularly punctured; punctures 

 small, obsolete towards the tip ; third interstitial line with three 

 punctures, two at the third stride and the terminal one at the 

 second striae; interstitial lines much depressed; tibiae, tarsi, 

 knees and extreme base of the thighs piceous. 



Length seven-twentieths of an inch. 



This species is rather more robust in proportion to its length 

 than the other American species. The thorax is much broader 

 and shorter. The species is perhaps more like scutellaris Say, 

 than any other ; that insect is remarkably depressed about the 

 region of the scutel. 



AGONUM Bonelli. 



1. A. SUTURALE. — Green, polished ; suture cupreous. 



Inhabits Mexico. 



Above metallic green, polished, impunctured; head with a 

 slight coppery reflection ; labrum, antennae and palpi blackish : 

 thorax varied with cupreous; dorsal line and basal dots obviously 

 indented ; elytra with very slender striae ; interstitial spaces wide 

 and plain, first one cupreous, third with three punctures, equidis- 

 tant, basal one on the third strise, middle one on the second 

 striae ; beneath piceous black ; coxae piceous. 



Length three-tenths of an inch. 



This is a brilliant species, equalling in this respect the S-pwnc- 

 tatwm Fabr., and errans nob. and but little inferior to cupripenne 

 nob., all of which, together with nutans nob., belonging to this 

 genus, although I referred them to the including genus Feronta, 

 Latr. The cuprip>enne nob., is equal in splendor, though not in 

 magnitude, to the Q-punctatum Fabr. In comparison with pamm- 

 punctatum F., the form is more robust, thorax more brUliant, 

 wider, and is as wide at base as anteriorly ; the interstitial spaces 

 also are much more flattened. L^^'^J 



1834.] 



