320 Aunah Entomological Society of America [Vol. Ill, 



Gen. Amphorophora H nekton 



type ampullata Buckton. 



Antennae longer than the body and placed on prominent 

 tubercles, third segment shorter than the spur of the sixth ; first 

 segment slightly gilibous on the inner side. Antennal tubercles 

 on inner side rounded. Head broad in front and almost fiat. 

 Rody elongate, abdomen stout. Wings large and regular, 

 nectaries about one fourth the length of the body and very 

 strongly vasiform. Cauda two thirds the length of the nec- 

 taries and tapering. Some species with cauda constricted about 

 the middle. 



Gen. Toxoptera Koch 



type aurantiae Koch. 



Antennae about as long as the body and placed on small 

 but distinct tubercles, third segment shorter than the spur of 

 sixth; first segment gibbous on the inner side. Body elongate, 

 wings long and slender with the cubital vein having but a single 

 fork. Nectaries one sixth the length of the body and cylindrical. 

 Cauda nearl}' as long as the nectaries and ensiform. Anal 

 plate broadly rounded. 



(}en. Phorodon Passerini 



type .1. Jiumuli Schrank 



Antennae nearly as long as the body and placed on prominent 

 tubercles, third segment longer than the spur of the sixth; first 

 segment strongly gibbous. Antennal tubercles bearing a long 

 tooth on the inner side, in the apterous forms this is more 

 developed. Forehead narrow with a small tubercle bearing 

 a frontal ocellus. Body elongate, wings long and broad with 

 cubitus twice forked. Nectaries about one sixth the length of 

 the body, cylindrical, and with a slight taper at the base. Cauda 

 one half the length of the nectaries, broad at the base and 

 tapering to a sharj) point. Anal plate broadly rounded. 



Gen. Rhopalosiphum Koch 



type A. persicac Sulzer. 



Antennae slightly longer than the body and placed on 

 l)rominent wedge shaped tubercles, third segment about the 

 same length as the spur of the sixth; first segment gil^bous on 

 the inner side. Antennal tubercles with a blunt tooth on the 



