VOLUME THREE 



NUMBER FOUR 



Journal of lEittomoIflgg 



DECEMBER 1911 



Contents 



DR. ALBERT J. COOK 



CALIFORNIA STATE COMMISSIONER OF HORTICULTURE 



E3SIG. E. O. --- .-.- Plant Lice of Citrus Trees 



KUWANA. S. I. -------... White Flies of Japan 



CRAWFORD, D. L. -------- - American Psyllidae V 



BANKS N. --------- Pseudoscorpions of California 



HALL, H.V. M. ---------- Studies in Acarina II 



PUBLISHED QUARTERLY BY THE 



irpartmrnl nf Itolagif nf Jlnmoua (EnllrgF 



A. J. COOK. D. Sc. Head Professor 

 CLAREMONT, CALIFORNIA, U. S. A. 



