302 LIST OF HOMOPTEROUS INSECTS. 



Pemphigus American us, Cat. Horn. p. 1057. 



Enosoma Pyri ? Filch, Fourth Report of the New York State 



Cabinet of Nat. Hist. (1851) 68. 

 Pemphigus Pyri ? Fitch, Report Insects, New York, 155. 



Pemphigus Cary\ecantis. 

 Pemphigus Caryaecantis, Fitch, Report Insects, New York, 155. 

 New York. 



Genus THECABIUS. 

 Thecahius, Koch, PJianzenl. 294. 



1. Thecabius Populneus. 

 Thecabius populnens, Koch, PJianzenl. 295, 1, pi. 51, f. 364. 



Genus TYCHEA. 



Tvchea, Koch, PJianzenl. 296. 

 Pemphigus, p. ? Cat. Horn. 1055. 



1. Tychea graminis. 



Tychea graminis, Koch, PJianzenl. 298, 1, pi. 51, f. 365, 366. 

 Pemphigus Ranunculi ? Cat. Horn. 1055. 



2. Tychea Amycli. 



Tvchea Amycli, Koch, PJianzenl. 300, 2, pi. 51, f. 367. 



Genus AMYCLA. 

 Amycla, Koch, PJianzenl. 301. 



1. Amycla fuscifrons. 

 Amycla fuscifrons, Koch, PJianzenl. 301, 1, pi. 52, f. 368— 370. 

 On the roots of Avena sativa. 



