AMERICAN HYMENOPTERA. 233 



On the CHRYSIDES of IVortli America. 



BY EDWARD NORTON. 



Table to assint in determining the genera. 



Abdomen convex above, beneath plane or concavej space between the eyes 



wide, only partly hidden by the first two joints of antennae; mouth 



not lengthened. . 



Anterior border of third abdominal segment without an inner series of pits. 



The apical margin always more or less deeply notched; t-^^^l^^^^^MPUs' 



rate or pectinate within 



The apical margin always rounded or merely sinuate. 



Tarsal claws with several inner teeth nW)YrHTlTJM' 



Tarsal claws with one inner tooth HEDYOHKUM. 



Anterior border of third abdominal segment preceded by a series of Pits dis- 

 posed in an arc of a circle. Nails of tarsi simple CHRYblb. 



EliAMPUS Spin. 

 Apical margin of third abdominal segment with an incision more or less 

 narrow and triangular.— (OmaZws, Panz., Dahlb.). 

 A.-Emargination of third segment narrow, its membranous edges not 

 turned up. 

 Postscutellum rounded and but slightly elevated. 

 Lateral margins of third segment not sinuate. 



Claws pectinate; mesothorax and scutel punctured, tergum polished, 



having sparse minute punctures smuosum. 



Lateral margins of third segment unisinuate. 

 Claws with two inner teeth. 



Mesothorax and anterior half of scutel and tergum polished, with- 

 out punctures; punctured area below postscutel extended as far 



as the side foveolEe 



Mesothorax and anterior third of scutel polished, with large, 

 sparse, subobsolete punctures; tergum polished, with minute 

 punctures; punctured area below postscutel wider than long, 



not extending as far as side foveolee IseviveutriS. 



Claws with four or five teeth. , , . 



Mesothorax, scutel and tergum as above; prothorax with obsolete 

 punctures; punctured area below postscutel extending as far as 



f, ., f ^ , • coruscaus. 



the side foveolse 



Postscutellum mucronate. . , j 



Lateral margins of third segment bisinuate, its sides pinched. 

 Claws with three inner teeth. _ 



Mesothorax and anterior third of scutel polished, but with large 

 sparse pits; apical segment of tergum with large, subobsolete 



, ^ speculum. 



punctures * 



(on\ APRIL, 1879. 



TRANS. AMER. ENT. SOC. VII. \-^^) 



