302 LIST OF HOMOPTEROUS INSECTS. 
Pempuicus Americanus, Cat. Hom. p. 1057. 
Enosoma Pyri? Fitch, Fourth Report of the New York State 
Cabinet of Nat. Hist. (1851) 68, 
Pemphigus Pyri? Fitch, Report Insects, New York, 155. 
Pempuicus Caryacantis. 
Pemphigus Caryecantis, Fitch, Report Insects, New York, 155. 
New York. 
Genus THECABIUS. 
Thecabius, Koch, Pflanzenl. 294. 
1, TuEcasius Poputnevs. 
Thecabius populneus, Koch, Pflanzenl. 295, 1, pl. 51, f. 364. 
Genus TYCHEA. 
Tychea, Koch, Pflanzentl. 296. 
Pemphigus, p.? Cat. Hom, 1055. 
1. TycHEs GRAMINIS. 
Tychea graminis, Koch, Pflanzenl. 298, 1, pl. 51, f. 365, 366. 
Pemphigus Ranunculi? Cat. Hom. 1055. 
2, Tycura Amycct. 
Tychea Amycli, Koch, Pflanzenl. 300, 2, pl. 51, f. 367. 
Genus AMYCLA. 
Amycla, Koch, Pflanzenl. 301. 
1. AMYCLA FUSCIPRONS. 
Amycla fuscifrons, Koch, Pflanzenl, 301, 1, pl. 52, f. 868—370. 
On the roots of Avena sativa. 
