natural sciences of philadelphia. 91 



Agrilus. 



A(t. Claws -with the appendices contiguous. 

 Ba. Scutellum not carinate. 



Ca. Hind angles of the thorax not carinate. fuscipennis. 



Cb. Hind angles carinate. arcuatus. 



Bb. Scutellum carinate. 



Ca. Pygidium with an elevated carina produced behind. 



Da. % abdomen impressed. ruficollu. 



Bb. % abdomen simple, elytra bicostate. difficilis. 



Cb. Pygidium not carinate. 



Da. % segments 1-2 impressed. L. .13-.18. otiosus. 



Bb. % segments simple. L. .20-. 32. | torquatua. 



, '.fulgeiis. 

 Ab. Claws with the appendices distant. 



Ba. Scutellum carinate. 



Ca. Thorax and head coarsely punctate, % simple. 



Walsingliami. 

 Cb. Thorax and head rugulose. 



Da. Pj'gidium with a projecting carina. 

 Ea. Sides of thorax pubescent. 



Fa. Elytra with pubescent vittte or J ^*^'^<'^- 

 spots. ) rjranaHus. 



^subfasctatas. 

 Fb. Elytra blue-green. acuti^yennis. 



Fc. Elytra dull black. vittatocollis. 



Eb. Thorax and elytra uniformly and verj'^ sparingly 

 pubescent. 



Fa. Green, finely granulate. [ <'"'^'^- 



' anxius. 



Fb. Cupreous, coarsely granulate, thorax foveate. 



inacer. 

 Db. Pygidium simple. 



Ea. Elytra with patches of pubescence. 



Fa. Hind angles of thorax carinate. \fallax 



texana. 

 Kit 



.znterruptus. 



Fb. Hind angles not carinate. subcincius. 



Eb. Elytra uniform. 



Fa. Head deeply sulcate, % hardly impressed. 



addendus. 

 Fb. Head at most impressed. 



f egenus. 



I lacustris. 

 Ga. % segments impressed. \ imbellis. 



floridana. 

 _pubiveniris. 



Gb. ^ segments simple. ivlumheus. 



\ pohius. 



