388 REFERENCES 
Piophila casei, Bur. Ent. Bull. 4. 
Plodia interpunctella, N. C. Exp. Sta. Bull. 203. 
Plusia simpler, Bur. Ent. Bull. 33. 
Plutella maculipennis, Ky. Exp. Sta. Bull. 114. 
Pecilocapsus lineatus, N. Y. Cornell Exp. Sta. Bull. 48. 
Polychrosis viteana, N. Y. Cornell Exp. Sta. Bull. 223. 
Pontia protodice, Ist Rpt. Minn. State Ent., pages 71-77. 
Pontia rape, Bur. Ent. Bull. 60. 
Porthetria dispar, N. H. Exp. Sta. Bull. 136. 
Prionus imbricornis, 5th Rpt. Minn. State Ent., page 110. 
Prodenia ornithogalli, Bur. Ent. Bull. 43. 
Pseudococcus calceolaria, La. Exp. Sta. Bull. 121. 
Pseudococcus citri, Cal. Exp. Sta. Bull. 214. 
Psila rose, Bur. Ent. Bull. 33. 
Psoroptes communis, Ind. Exp. Sta. Bull. 80. 
Psylla pyricola, Rpt. Conn. State Ent., 1903, pages 262-266. 
Psylliodes punctulata, Bur. Ent. Bull. 66-VT. 
Pteronus ribesii, Rpt. Conn. State Ent., 1902, pages 170-172. 
Pulvinaria vitis, Il. Exp. Sta. Bull. 112. 
Pyralis farinalis, N. C. Exp. Sta. Bull. 203. 
Rhagoletis cingulata, N. Y. Cornell Exp. Sta. Bull. 172. 
Rhagoletis pomonella, N. H. Exp. Sta. Cire. 14. 
Rhopobota vacciniana, Mass. Exp. Sta. Bull. 115. 
Sanninoidea exitiosa, Ga. Exp. Sta. Bull. 73. 
Saperda candida, Bur. Ent. Cire. 32. 
Schistocerus hamatus, Farmers’ Bull. 70. 
Schizoneura lanigera, Colo. Exp. Sta. Bull. 133. 
Schizura concinna, N. H. Exp. Sta. Bull. 139. 
Selandria vitis, Rpt. N. J. State Ent., 1889, page 304. 
Sibine stimulea, 4th Rpt. Minn. State Ent., pages 98-99. 
Silvanus surinamensts, N. C. Exp. Sta. Bull. 203. 
Siphocoryne avene, Colo. Exp. Sta. Bull. 133. 
Silones flavescens, Ill. Exp. Sta. Bull. 134. 
Sitotroga cerealla, N. C. Exp. Sta. Bull. 203. 
Sphenophorus maidis, Bur. Ent. Bull. 95-II. 
Sphenophorus spp., Ill. Exp. Sta. Bull. 95. 
Sphinx spp., 4th Rpt. Minn. State Ent., page 29. 
Spilonota ocellana, Rpt. Conn. State Ent., 1909, page 353. 
Stomorys calcitrans, Bur. Ent. Cire. 71. 
Synanthedon pictipes, Bur. Ent. Bull. 6S-IV. 
Synchlora erata, 8th Rpt. N. Y. State Ent., pages 129-133. 
Systena blanda, Bur. Ent. Bull. 23. 
