AMERICAN PHILOSOPHICAL SOCIKTY. 535 



impressions between the eyes rather dfei» ; thorax rather short, 

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

 larly curved ; margin .slightly eh-vated, 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 stria;, regularly punctured; punctures 

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

 punctures, two at the third stria; and the terminal one at the 

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

 knees and extreme base of the thighs pieeous. 



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 srnuf/dris Say. 

 than any other ; that insect is remarkably depressed about the 

 region of the seutel. 



AGONUM Bonclli. 



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



Inhabits Mexico. 



Above metallic green, polished, impunctured ; head with a 

 slight coppery reflection ; labrum, antenna; and palpi blackish : 

 thorax varied with cupreous; dorsal line and basal dots obviousl}' 

 indented ; elytra with very slender stria; ; interstitial spaces wide 

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

 tant, basal one on the third stria;, middle one on the second 

 stria; ; beneath piccous black ; coxa; pieeous. 



Length three-tenths of an inch. 



This is a brilliant species, equalling in this respect the >>-punc- 

 tatiim Fabr., and ernoin nob. and but little ini'cr'wT to r up ripciinr 

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

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

 Latr. The cupripennc nob., is eijual in splendor, though not in 

 magnitude, to the iS-punctatum Fabr. Li comparison with punim- 

 puncUitum F., the form is more robust, thorax more brilliant, 

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

 also are much more flattened. [423] 



1834.] 



