112 



ovalispora, Lsaria, xx, 101. 

 ovatus, Otiorhynchus, xxiii, 192, 228. 

 Owl, Barred. White-grubs eaten by, 

 xviii. 123. 

 Great Horned, June-beetles eaten by. 



xviii, 123. 

 Screech, June-beetles eaten by, xviii. 

 123. 

 Oxalis stricta infested by Corn Root- 

 aphis, xvii, 67 ; xviii. 61. 

 oxycoccana, Teras, xv, 79, 81, 82. 



I' irtrix, xv. 79. 

 Oxyptilus delavaricus, xiv, 90, 91-92. 

 Ovster-shell Bark louse, or Scale, xvii. 

 XIV; xx. 16. 

 distribution of in Illinois, xxii. 119. 

 eggs of, xxii, 119. 

 general description of, xxii, 119. 

 protection against, xxii, 120. 

 winter stage of, xxii. 113. 



Pachymerus as parasite of Common Gar- 

 den Web-worm, xxi. 109. 



pachytili, Esaria, xx, 101. 



Packard. A. S., xiii. 32, 63. 77. 7*. 7". 

 80. 94. 97. 139, 147: xiv. 18. 30; Misc. 

 Ess.. 129; xv. 52. 55. 76, 78; xviii, 

 25 : xxi. 76. 145 : xxiii. S6. 



Pale-striped Flea-beetle. See Flea- 

 beetle, Pale-striped, Broad-striped, 

 and Yellow-striped. 



pallens, Geocoris, xxi. 95. 



pallipennis, Carpophilus, xxiii. 181. 



pallipes, Agonoderus, xviii, 8. 12: xxiii. 

 11. 178. 228: xxi v. 26. 

 Pteromalus, xiv, 46, 48, 4". 50: Misc. 

 Ess., 15. 



pallorana, Tortrix, xiv, 74. 



pallulella, Stenoptycha, xvii, 29. 



palustris, Caltha, xiv, 80. 



Pamphila accius, xxiii, 166. 



pampinaria, Cymatophora, xiii, 61, 76. 

 lemis lamprosana as a sofl maple 

 insect, xiv. 109. 



panicea, Sitodrepa, Misc. Ess., 97. 



Panic-grass as food of Psylliodes con- 

 vexior, xxi, 124. 

 infested by Geoica squami -a. xviii. 



100 



Yellow Sorghum Plant louse on. xxiii, 

 210. 

 panici, Rhizobius, xviii, 106. 



Tychea, xviii. 101. 106. 

 panicola, Schizoneura, xiii. 42. 4". 51 

 53: xiv, 28, 29; xviii. 53. 57. 68, 85. 

 Panicum. xiv, 24. 



aerial \nhis maidis found on. Mi--. 

 . 48. 



Panicum — Continued. 

 as breeding plant of Scudderia texen- 



sis, xxiii, 144. 

 as food plant, of Chinch-bug, xv, 94. 

 crus-galli as food plant of same, xvi, 

 52. 

 of Psylliodes convexior, xxiii, 

 102. 

 infested bj I r< i ica squamosa, xviii. 

 100. 

 glabrum as breeding plant of Corn 

 Root-louse, xiii, 49. 

 infested bv Grass Root-loiw. x\iii, 

 85, 93. 

 infested by Chaitophorus sp., xiii, 42. 

 by Corn Root-aphis, xvii, 67: xviii, 



61. 

 by Grass Root-louse, xviii. 86, 87, 



88. 

 bv Schizoneura panicola. xiii, 42, 



51. 52. 

 by Trama erigeronensis, xviii, 93. 

 proliferum infested 1>\ Woolly Grass 



Root-louse, xviii. 105. 

 Yellow Sorghum Plant-louse on, xxiii. 

 210. 

 Pansy plain- destroyed by Clay-backed 



Cutworm, xxiii. 28. 

 Papaipema nitela, xxiii, 7. 10. 11. 17, 



44-47. 

 Papilio asterias, flaoherie of. xix. 76. 



infection experiment with. xix. 76. 

 Parajulus diversifrons eating grains of 

 Corn in ear. xxiii. 223. 

 venustus, situations found in, xxiii. 

 223. 

 Parandra brunnea infested by Botrytis 

 sp., xvi, 49. 

 bv Sporotrichum globuliferum, 

 "xvii. 79, 81. 

 Parasites ami other enemies: 

 of Aleurodes aceris, xiv. 110. 

 of Angoumois Grain-moth, xiii, 10. 

 of Aphis sp.. xiii. 103. 

 of Apple Leaf-skeletonizer, xv. 60. 64. 

 of Apple ( )rnixj xv. ?7. 

 ■ if Vpple Tischeria, xv. ?o. 

 of arm :r< d scales, xx, 20. 

 of Army-worm, xxiii. 49. 51. 

 ■ i ^.spidiotus i bscurus, xx. 22. 



,ees, \xi. 138. 139. 

 of Beel Web-worm. xxi. 111. 

 of Bronze Cutworm, xxiii. 30. 

 of Cabbage Plusia. xxi. 153. 

 of Chinch-bug, xiii. 9. See under 



Chinch-bug, diseases of. 

 of Clay-backed Cutworm, xvi. 93. 

 of Clover-seed Midge, Misc. Ess., 16; 



xv. 4. 

 .if ('.minion Garden Web-worm. xxi. 

 109. 



