No. 34-] HEMIPTERA OF CONNECTICUT: APHIDIDAE. 287 



Subtribe Phyllaphidina. 



Forms living free or in pseudo galls. Sexual forms often both 

 alate, sometimes, however, apterous or intermediate ; oviparous 

 female producing several eggs. Flocculent wax often abundant. 

 Cornicles present ; antennae of six segments with the unguis 

 usually short, sensoria elongate or subcircular ; cauda knobbed or 

 rounded, anal plate often bilobed or deeply divided; wax glands 

 large. 



Key to Genera. 



Cauda rounded ; anal plate entire Tamelia, p. 287 



Cauda knobbed ; anal plate somewhat bilobed Phyllaphis, p. 287 



Phyllaphis Koch. 



Cornicles present as chitinized rings which are very slightly 

 elongated on low conical bases. Antennae of six segments, long 

 and slender, minutely setose, sensoria narrowly oval. Fore wing 

 with the media twice branched; hind wing with both media and 

 cubitus present. Cauda knobbed, anal plate bilobed. Large wax 

 glands present. 



Forms living on foliage sometimes causing curling of the leaves. 

 Males winged ; oviparous females apterous. 

 P. fagi (Linnaeus). Aphis fa gilAnwdiQMs. 



Syst. Nat, Edn. 12, 735, 1767. 



The only species recorded from New England. 



Southport, 31 May, 1906; Farmington, 11 July, 1906; on beech, New 

 Haven, 14 June, 1909 (B. H. W.) ; Norwich, 17 Sept., 1910. 



Tamelia Baker. 



Cornicles present as rings on elevated conical bases. Antennae 

 of six segments armed with narrow sensoria. Fore wing with the 

 media once branched (often twice branched) ; hind wing with 

 both media and cubitus present; cauda and anal plate both 

 rounded. Large wax plates often present. 



Forms living in pseudo galls or on the foliage ; oviparous female 

 often winged. 



Type : Pemphigus coweni Cockerell. 



Key to Species. 



Forming galls on bearberry ; oviparous females winged coweni 



Forming woolly colonies on oak leaves; oviparous females not 

 winged quercifoliae 



T. quercifoliae (Gillette). Phyllaphis quercifoliae Gillette. 



Ent. News, xxv, 272, 1914. 



Specimens of quercifoliae from Gillette indicate that quercicola 

 Baker is the same species, since great variation occurs. Winged, 



