62 Bulletin 332 



Riley for information on the identification of the various layers 

 abont the egg, to Mr, J. J. Davis for help in identifying specimens, 

 to Mrs. John B. Smith for the privilege of experimenting upon a 

 few young apple trees and to various fruit growers throughout the 

 state for their cooperation in spraying. 



(1 

 (2 



(3 



(4 

 (5 



(6 



(7 



(8 



(9 



(10 



(11 



(12 



fl3 

 (14 



(15 



References 



Aldrich, J. M. 1904. Winter spraying for apple aphis. 

 Idaho Agr. Ep. Sta. Bui. 40. 



Baker, A. C, and Turner, W. F. 1916. Morphology and 

 biology of the green apple aphis. Jn .lour. Agr. Res., v. 5, 

 p. 956-990. 



Baker, A. C, and Turner, W. F. 1916. Rosy apple aphis. 

 In Jour. Agr. Res., v. 7, p. 321-343. 



Davidson, ^^\ M. 1914. AA^aluut aphides in California. U. S. 

 Dept. Agr. Bui. 100. * 



Folsom, J. W. 1909. Entomology with Reference to its Bio- 

 logical and Economic Aspects, p. 129-130. P. Blakistons' 

 Son and Co., Phila., Pa. 



Gillette, C. P. 1910. Some insecticide tests for the destruc- 

 tion of Aphidicke and their eggs. In Jour. Econ. Ent., 

 V. 3, p. 207-210. 



Gillette, C. P., and Taylor. E. P. 1908. A few orchard 

 plant lice. Col. Agr. Exp. Sta. Bui. 133. 

 Gillette, C. P., and Taylor, E. P. 1908. Orchard plant lice 

 and their remedies. Col. Agr. Exp. Sta. Bui. 134. 

 Headlee, T. J. 1916. Apple plant lice. Jn N. J, Agr. Exp. 

 Sta. 38th Ann. Rpt.. p. 494-501. 



Headlee. T. J. 1918. Some Important orchard plant li«e. 

 N. J. Agr. Exp. Sta. Bui. 328. 



Hennequy, L. Felix. 1904. Les Insectes, Morphologie- Re- 

 production-Embryogenie, Paris. ]\Tasson et Cie, Editeuro. 

 Jones, P. R. 1915. Preliminary report on spraying eggs for 

 the control of the purple and green apple aphides of Cali- 

 fornia. In Cal. State Com. Hort. Mo. Bui., v. 4, no. 1, 

 p. 20-30. 



Korschelt. E.. and Heider. K. 1899. Text Book of Em- 

 bryology-Invertebrates, V. 3. (Translation). The Macmillan 

 Cojiipany, New York. 



Lunge, G. 1911. Technical Methods of Chemical Analysis 

 (Translation) by C. A. Keane. Tests for phenol, v. 2. p. 821. 

 Van Nostrand Co.. New York City. 



Less, A. II. 1916. Winter Cover-washes. In Ann. AppL 

 Biol., v. 2, p. 245-250. 



