109 



Nursery — Continued. 

 inspection in Illinois, xxi, 7-11; xxii, 



pests, description and discussion of 

 species of, xxii. 106-138. 

 injurious to bark or wood, xxii, 

 100-101. 

 to leaf or bud, xxii, 101-103. 

 to roots, xxii, 99-100. 

 principal, classification and descrip- 

 tion of, xxii, 99-102. 

 likely to be distributed in trade, 



xxii, 98-138. 

 winter forms and appearance of, 

 xxii, 103-104. 

 trees and crown-gall, xxii, 111. 



injury to, bv Crepidodera helxines, 

 xiv, 117. 

 by grasshoppers, Misc. Ess., 50. 

 Nussbaumer, J. J., Misc. Ess., 16, 19. 

 nuttalli, Cantharis, xxi, 139, 142. 

 Nuttall's Blister-beetle, xxi, 142. 

 Xysius, xxi, 93. 

 angustatus, xiii. 62, 104-106: xxi, 94, 



95-96; xxiii, 12, 117-118. 

 destructor, xiii, 104-105. 

 minutus, xxi, 95. 



Oak as food plant of adult White-grubs, 

 xvii, 42, 43: xviii, 114; xxi, 

 165; xxlv. 143. 144. 

 of Goldsmith-beetle, xiii, 146, 



148. 

 of Horned Spanworm, xiii, 79. 

 of Red-banded Leaf-roller, xiv, 



21; xxiii, 175. 

 of San Jose Scale, xx, 1 ; xxi, 



13. 

 of Smartweed Caterpillar, xxiii, 

 170. 

 defoliated by forest caterpillars, xviii, 

 X. 

 by Leaf-cutting Ant, xxiii, 160. 

 infested by Euphoria inda, xxiii, 101. 

 by Pale-striped Flea-beetle, xxi, 121. 

 injury to, by Cottony Maple Scale, 



xxiv. 103. 

 Platymetopius acutus on, xxi, 73. 

 Typhlocyba rosge on, xxi, 78. 

 Water, parasitized Aspidiotus obscu- 

 rus on. xx. 22: xxi, 31. 

 Oaks, Lachnosterna beetles collected 



from, xxiv, 141. 

 Oat-grass, Meadow, as food plant of 



Garden Web-worm, xxiii, 90. 

 Oat-louse, xvii, X. 

 Oats, xvi, 55. 

 as food plant of Leucania pseudar- 

 gyria, xxiii, 171. 



Oats — Continued. 

 bred on or injured by Chinch-bug, 

 xv, 1, 93, 96; xvi, 6, 7, 51; xviii, 

 VIII; xxiii, 59, 60. 

 Clover Plant-louse on, xxiii, 208. 

 destroyed by Pale-striped Flea-bee- 

 tle, xxiii, 108. 

 by Schistocerca americana, xxiii, 141. 

 eaten by Army-worm, xxiii, 49. 



by Clay-backed Cutworm, xxiii, 28. 

 by Western Green Stink-bug, xxi, 

 97; xxiii, 116. 

 effect on Corn Root-aphis of change 

 of crop from Corn to, xxiv, 20-24, 

 28. 

 Empoasca mali on, xxi, 78. 

 English Grain-louse on, xxiii, 207. 

 fields abandoned by Corn Root-aphis, 

 xxiv, 23. 

 Asaphes decoloratus collected from, 

 xviii, 45. 

 infested by Cicadula nigrif rons. xiv, 68. 

 by Cicadula 6-notata, xxi, 77. 

 by Corn Flea-beetle, xxiii, 110. 

 by Euschistus variolarius, xxiii, 196. 

 by Geoica squamosa, xviii, 99, 100. 

 by Stalk-borer, xxiii, 46. 

 by Sweet-Potato Flea-beetle, xxiii, 



111. 

 by Toothed Flea-beetle, xxiii, 110. 

 or injured by Sphenophorus parvu- 

 lus, xvi, 58, 59, 63 ; xxiii. 56. 

 injury to, by cutworms, xvi, 84, 90. 

 bv Deltocephalus nigrifrons, xxi, 



"75. 

 by Glassy Cutworm, xxiii, 20. 

 by grasshoppers. Misc. Ess.. 48. 



49, 50. 51, 53, 127. 

 by Grass-worm, xiv, 62; xxi, 149: 



xxiii, 82. 

 by Stalk-maggot, xxiii, 164. 

 by Thvanta perditor, xxiii, 117. 

 by White-grubs, xx, 29, 30, 31. 

 by Yellow-headed Cutworm, xxiii, 



21. 

 by Zebra-caterpillar, xxi, 153. 

 killed by sod web-worms, xxiii, 37. 

 Southern Grain-louse, or Grain-louse, 



destructive to, xvii, X ; xxiii. 134. 

 subject to injury by wireworms, xviii, 



30.^ 

 volunteer, Misc. Ess., 20; xv, 5. 

 and Wheat Bulb-worm, xv, 38. 

 as food plant of adult Southern 

 Corn Root-worm, xviii, 148. 

 Oberea sp., xxiv. 127. 



tripunctata, Elm infested by, xxiv, 



127-128. 

 ulmicola, xxiv, 118-134. See Elm Twig- 

 girdler. 



