REFERENCES 387 



Musca domestica, Farmers' Bull. 459. 



Myzus cerasi, Colo. Exp. Sta. Bull. 133. 



Myzus persicce, Colo. Exp. Sta. Bull. 133. 



Myzus ribis, N. Y. Geneva, Exp. Sta. Bull. 139. 



Noctuidce, 111. Exp. Sta. Bull. 95. 



Nysius angustatus, 23d Rpt. 111. State Ent., page 117. 



Oberea bimaculata, Ohio Exp. Sta. Bull. 96. 



(Ecanthus spp., 23d Rpt. III. State Ent., page 215. 



(Estrus ovis, Bur. Ent. Bull. 5. 



Oncideres cingulatus, Okla. Exp. Sta. Bull. 91. 



Otiorhynchus ovatus, Maine Exp. Sta. Bull. 123. 



Oxyplilus periscelidactylus, 4tli Rpt. Minn. State Ent., page 221. 



Pachymerus chinensis, Yearbook, U.S.D.A., 1898, page 242. 



Pachymerus quadrimaculatus, Yearbook, U.S.D.A., 1898, page 245. 



Pachynematus extensicoriiis. Insect Life, Vol. IV, pages 174—177. 



Pachyzancla bipunctalis, Bur. Ent. Bull. 109-11. 



Paleacrita vernata. Bur. Ent. Bull. 68-11. 



Papaipema nitela, 111. Exp. Sta. Bull. 95. 



Papilio polyxenes, Bur. Ent. Bull. 82-11. 



Parasites, Introduction of. Bur. Ent. Bull. 91. 



Pegomya brassicce, N. J. Exp. Sta. Bull. 200. 



Pegomya fusciceps, Bur. Ent. Circ. 63. 



Pegomya vicina, N. Y. Geneva Exp. Sta. Bull. 99. 



Pelidnota punctata, Okla. Exp. Sta. Bull. 26. 



Pemphigus betoe, Wash. Exp. Sta. Bull. 42. 



Pentatoma ligata, Bur. Ent. Bull. 86. 



Peridroma margaritosa. Bur. Ent. Bull. 29. 



Periplaneta americana, Bur. Ent. Circ. 51. 



Peronea minutaf Iowa Exp. Sta. Bull. 102. 



Phlegethontius spp., Bur. Ent. Circ. 123. 



Phla^ophthorus liminaris. Bur. Ent. Bull. 68-IX. 



Phlyctoenia ferrugalis, N. Y. Cornell Exp. Sta. Bull. 190. 



Phorbia cepetorum, Bur. Ent. Circ. 63. 



Phorbia rubivora, N. Y. Cornell Exp. Sta. Bull. 126. 



Phorodon humuli, Cal. Exp. Sta. Bull. 160. 



Phthorimcea operculella, Cal. Exp. Sta. Bull. 135, Farmers' Bull. 120. 



Phyllotreta pusilla, Bur. Ent. Bull. 43. 



Phylloiretra vittata, Rpt. Ent. U.S.D.A., 1884, pages 301-304. 



Phylloxera vastratrix, Farmers' Bull. 70. 



Phytonomus nigrirostis, Bur. Ent. Bull. 85-1. 



Phytonomus posticus, Utah Exp. Sta. Bull. 110. 



Phytonomus punctatus, lU. Exp. Sta. Bull. 134. 



