256 Agricultural Experiment Station, Ithaca, N. Y. 



Bibliography and Synonomy. 



I'syll.a pyi-icola Foreter, J'syll. p. 77 (1S48), orip^nal d(«cnption; 

 Ix)w, ^>rli. der Zool. Bot. Gk?s. in Wieii, XXXII, 247 (1882), 

 syiionoiuy; ibid, XXXIV, 148 (1884), bibliogra^phy ; ibid, XXXVI, 

 154 (1880), tiible of species ftraiiwlation in Insect Life, IV, 127); 

 Riley, Proc. Biol. Soc. Wash. II, 07 (1883), synonomy; Scott, Ent. 

 M. Mas., XIX, 205 (1883), nymph describefl; Lintner, Country Oent 

 (1801), Ent. Club A. A. A. S., in Can, Ent. XXIII, 230 (1801), life 

 histoTy ; Schwarz, ibid, in Michigan. Slingerland, Assoc. Ecimomic 

 Entomologists Aug. 16, 1892, life history, preventive methods. 



Psylla apiophila Fonster, Psyll. jj. 78 (1848), description; Low. 

 Verh. Zool. Bot. Ges. in Wien, XXVII, 137 (1877), synonym ; ibid. 

 XXXII, 232 (1882) s;yTionym. 



l*sylla notata, Flor. K. d. Rhyn. p. 365 (1861), original descrip- 

 tion; Low, Verh. Zool. Bot. Ges. in Wien, XXXII, 244 (1882) 

 synonym. 



Psylla pyrisuga Fomtiir. Barnard, Proc. A. A. A. S., XXVIII, 

 478 (1870), life history. 



Psylla ])yri Lin. Ciirtis, Gard. Cliron. p. 156 (1842), stages 

 described; Hari'is, Inj. Ins. p. 201 (1852), early history in IT. S.; 

 Fitch, Tliird Rept, p. 252 (1856), brief; Uhler, Agr. Rept. p. 314 

 (18.^^0), biief; Glover, Rept. (1864), p. 560; ibid (1876), p. 33, bnef; 

 Pac.'kard's Guide, p. 531 (1869), brief; Le Baron, Second Rppt. p. 

 134 (1872), stages described, brief; Thomas, Third Rept. p. 16 

 (1S79), stages described, brief; Ashmead, Can. Ent. XIII, 220 

 (18S1), bi-ief ; Cooke, Inj. Ins. p. 117 (1883), stages described, brief; 

 Saunders, Inj. Ins. p. 145 (1889), stages described, brief; Fishei', 

 I'nll. 17, Hatch Expt. Sta. Mass., p. 24 (1892), experimen.ts against; 

 Lintner. Science, XIX, 343 (1802), habits, brief. 



Psylla simulans Forster, Psyll. p. 80 (1848), original description; 

 Scott, Trans. Ent. Soc. Ixmdon, p. 53() (1876), described as P. pyii. 



S]iiio-erland Assoc. Economic Entomologists. Aug. 16, 1S!)2, 

 synonym. 



Psylla argyix)stigma. Foi-ster, Psyll. ]». 97 (1848), descripti<m. 



Psylla s]>. Ivodeman, Garden and Forest, June 15, 1892, life his- 

 tory, brief. 



]MARK VERNON SLINGERLAND. 



