LIST OF HOMOPTEROUS INSECTS. 917 



24. PSYLLA PYRICOLA. 



Psylla pyricola, Foerster, Psyll. Verh. Nat. Ver. Preuss. RheinL 1848, 

 3, 77, 25. 



Germany. 



25. PSYLLA APIOPHILA. 



Psylla apiophila, Foerster, Psyll. Verh. Nat. Ver. Preuss. RheinL 

 1848, 3, 78, 26. 



a. England. Presented by J. C. Dale, Esq. 



b, c. Prussia. Presented by F. Walker, Esq. 



26. Psylla pyrisuga. 



Psylla pyrisuga, Foerster, Psyll. Verh. Nat. Ver. Preuss. RheinL 

 1848, 3, 78, 27. 



a. Prussia. Presented by F. Walker, Esq. 



27. Psylla Salicis. 



Chermes Salicis, Linn Syst. Nat. ii. 739, 14. Faun. Suec. 1012. 



Fair. Sp. Ins. ii. 392, 14. Mant. Ins. ii. 318, 14. Ent. Syst. 



iv. 223, 14. Syst. Rhyn. 305, 14. Gmel. Ed. Syst. Nat. i. 4, 



2213, 14. Sc'hrank, Faun. Boic. ii. 1, 140, 1247. Stew. EL 



Nat. Hist. ii. 112. Turt. Syst. Nat. ii. 711. 

 Psylla Saliceti, Foerster, Psyll. Verh. Nat. Ver. Preuss. RheinL 



1848,3,79,28. 



a, b. England. Presented by F. Walker, Esq. 



c. Prussia. Presented by the Entomological Club. 



d. ? 



28. Psylla ferruginea. 



Psylla ferruginea, Foerster, Psyll. Verh. Nat. Ver. Preuss. RheinL 

 1848, 3, 79, 29. 



a. England. Presented by F. Walker, Esq. 



b. Prussia. Presented by E. Doubleday, Esq. 



c. Prussia. Presented by F. Walker, Esq. 



