No. 34'] HEMIPTERA OF CONNECTICUT: APHIDIDAE. 321 



Mesothorax without wax pore plates at inner posterior margin of 



lateral lobes sacculi 



(Fundatrigenia) 

 2. Venation of fore wing constant. M always once forked. Fork 

 of M long, distance from tip of wing to fork subequal to distance 



to base of stigmal vein tremulae 



(Fundatrigenia) 

 Venation of fore wing variable. M frequently simple. Fork of 

 M short. Distance from tip of wing to fork less than distance 



to base of stigmal vein pseudobyrsa 



(Fundatrigenia) 



A. pseudobyrsa (Walsh). Byrsocrypta pseudobyrsa Walsh. 



Proc. Ent. Soc. Phila., i, 306, 1862. 



See Gillette (1914b). 



On silver poplar, Fairfield, 25 June, 1912 (R. C. Hitchcock). 

 A. sacculi Gillette. 



Ann. Ent. Soc. Amer., vii, 65, 1914. 



See Gillette (1914a). 

 A. tremulae De Geer. 



Faun. Suec, 261, 1761. 



See Tullgren (1909). 



Cornaphis Gillette. 



This genus is closely related to Asiphum Koch. Stem mother 

 with five- jointed antennae. Wax pore plates absent. Young of 

 stem mother apterous. Wax pore plates composed of many 

 several-sided facets of uniform size surrounded by chitinous ring. 

 Front of apterous females armed with conical tubercle. Third 

 generation (Sexuparae) all acquire wings. Alate viviparous 

 females have six- jointed antennae. Sensoria oval. Fore wing 

 with M simple. Media and cubitus both present in hind wing. 

 Cornicles wanting. Sexuals small, beakless, females laying but 

 one egg. Antennae five- jointed. Stem mother, fundatrigenia 

 (apterous, second generation) and sexuparae (alate viviparous, 

 third generation) all produced in the same galls on leaves of host 

 plant. 

 C. populi Gillette. 



Ann. Ent. Soc. Amer., vi, 491, 1913. 



The only species in the genus ; produces galls by folding leaves 

 of Populus angustifoliae. See Gillette (1913b). 



Prociphilus Koch. 



Stem mother with five- jointed antennae. Wax pore plates well 

 developed on head, thorax and abdomen. Prothorax with four 

 plates in a transverse row. Central pair frequently confluent. 



Young of stem mother all acquiring wings. Third generation 

 apterous. Alate generations with six- jointed antennae. Second- 



II 



