XV 



clover as food plant — CunliiiHed. 

 of Grass-worm, 82. 

 of Hedgehog Caterpillar, 74. 

 of Red-banded Leaf-roller, 175. 

 of Salt-marsh Caterpillar, 74. 

 of Sulphur Leaf-roller, 174. 

 of Variegated Cutworm, 24. 

 of W-marked Cutworm, ' i . 

 destroyed by Schistocerfl americana, 141. 

 immune from Chinch-bug injury, 59. 

 infested by sod web-worms, 40. 

 injured by Clay-backed Cutworm, 28. 

 by field-crickets, 214. 

 by meadow maggots, 161, 162. 

 by Striped Blister-beetle, 112. 

 by Western Striped Cutworm, 27. 

 leaves of, eaten by larva; of Prodenia orni- 



thogalli eudiopta, 80. 

 Plant-louse, 208. 



Red, as food plant of Garden Web-worm, 90. 

 infested by Dusky Leaf-bug, 199. 

 by Euschistus variolarius, 196. 

 by Prenolepis imparls, 159. 

 by Sweet-Potato Flea-beetle, 111. 

 and White, leaves of, rolled by Rusty- 

 Brown Tortrix, 176. 

 leaves and blossoms of, eaten by adult of 

 Southern Corn Root-worm, 188. 

 roots, Parajulus venustus found about, 223. 

 Sweet. See Sweet Clover. 

 White, destroyed by Pale-striped Flea- 

 beetle, 108. 

 Club-rush as food plant of larva; of corn bill- 

 bugs, 52. 

 Coal-tar strip as barrier against Chinch-bug, 



63. 

 Coccinella 9-notata, 231. 



eating Corn leaf, 179. 

 Coccinellidae, 179. 

 Cockerell, T. D. A., 184. 



Cocklebur as food plant of Euphoria inda, 101. 

 of Garden Web-worm, 90. 

 of Grass-worm, 82. 

 of Pale-striped Flea-beetle, 108. 

 of Stalk-borer, 46. 

 coeruleocinctus, Julus, 223. 

 cognatus, Ataenius, 183. 

 Colaspis brunnea, 104-106. 

 Root-worm, 104-106, 228. 

 injury to Corn by, 104, 105. 

 Colastus semitectus found on Corn ears, etc., 



181. 

 Coleoptera, 230. 



number of species of, identified as corn in- 

 sects, 11. 

 Coleopterous larva destructive to Corn, 186. 

 Columbine as food plant of Zebra-caterpillar, 



171. 

 Comfrey as food plant of Bristly Cutworm, 35. 

 communis, Phragmites, 165. 

 Comstock, J. H., 164, 175. 

 concavus, Lixus, 114, 115, 229. 

 confinis, Chcetocnema, 110. 

 ccnica, Chlorochara, 203. 



Chlorochroa, 203. 

 convexior, Psylliodes, 191, 192. 



Convolvulus as food plant of Yellow Bear, 74. 

 Cook, A. J., 19, 21, 34, 78, 119, 175. 

 Coquillett, D. W., 223. 

 Corimelffna pulicaria, 115, 233. See Little 



Negro-bug. 

 Corn bill-bugs. See Bill-bugs, corn. 

 Delphax, 120-121. 



ears, Euschistus fissilis feeding on, 195. 

 green, fed in by Rusty-Brown Tortrix, 176. 

 infested by Parajulus venustus, 223. 

 thousand-legged worms feeding in, 222. 

 Flea-beetle, 107, 109-110. 

 general effect of insect injury to, 5. 

 grouping of injuries to, 225. 

 in husk injured by tineid leaf-miner, 176. 

 injuries to, affecting the whole plant, 227. 

 to ear of, 8. 

 to leaves of, 6, 226. 

 to silks of, or to kernels at tip of ear or 



beneath husks, 226. 

 to stalk of, 7. 



above ground, 226. 

 to tassel of, 227. 



to underground parts of plant of, 227. 

 insect group, divisions of, 2. 



most destructive to, 57. 

 insects eating irregular holes in leaves of, 

 or notching edges of same, 226, 230-231. 

 grouped according to economic import- 

 ance, 14-16. 

 injurious to the plant above ground, 16-17, 

 subterranean, 3. 

 the less important, 70-155. 

 the more important, 16-69. 

 the unimportant, 156-224. 

 kernels as food of Dusky Leaf-bug, 199. 

 of .Julus coeruleocinctus, 223. 

 of Plagiognathus obscurus, 201. 

 eaten by Parajulus diversifrcns, 223. 

 gnawed by Formica schaufussi, 161. 

 punctured by Leptoglossus oppositus, 197. 

 key to the discussion of insect injuries to, 



225-233. 

 Leaf-aphis, 2, 3, 12, 123-133. 

 field observations on, 126—128. 

 injuries by, 123-124, 125. 

 insectary experiments with, 128-133. 

 on life history of, 125, 133. 

 Leaf-beetle, Southern, 103-104, 231. 

 leaf, eggs of Drseculacephala mollipes de- 

 posited on, 205. 

 Leaf-louse, 123-133. 



as Broom-corn and Sorghum insect, 206. 

 Leaf-miner, 164, 226. 

 leaves as food of Hyperchiriaio, 168. 



bred on by Yellow Sorghum Plant-louse, 



210. 

 colonies of Clover Plant-louse found on, 



208. 

 cut up by Leaf-cutting .4nt, 160. 

 eaten by larva of Lerema accius, 166. 

 by larva of Prodenia ornithogalli eudi- 

 opta, 80. 

 by Scudder's Short-winged Grassho|)per, 



142. 

 by Short-winged Green Grasshopper, 212. 



