Ill 
Cauliflower as food of adult Southern Corn 
Root Worm, 148. 
Ceanothus amerieanus as food of Lachno- 
sterna rubiginosa,115. 
Cebrio,31. 
Cebrionini,31. 
Cecidomyia leguminicola,XL 
Cecropia Moth, larva, damaging young 
Apple-trees, X. 
Cerambycidae, 146. 
Ceratochloa australis infested by Schizo- 
neura venusta,93. 
Chsetocnema pulicaria, attack on young 
corn, VII. 
Chaitophorus flavus.70,72. 
Cha!colepidius,31. 
Chenopodium as food of Pale-striped Flea- 
beetle, 22. 
Chermesince,106. 
Cherry leaves as food of adult Southern 
Corn Root Worm, 149. 
as food of May Beetles,114. 
Chestnut leaves as food of May Beetles, 114, 
115,119. 
Chickens as enemies of White Grubs,124. 
Chinch Bug, 4,52,53,58. 
as food of Agonoderus pallipes,13. 
of Lasius niger,84. 
breeding places mostacceptable to,VIII. 
distribution of infection material for,X. 
field notes and correspondence concern¬ 
ing, YIII, IX. 
in 1890 and 1891.VII-X. 
noticeable feature of injury, YIII. 
outline of infested area, VII, VIII. 
relative damage to crops, VIII,IX. 
white fuDgus of, X, 127,136. 
spores used to infect White Grubs, 
136. 
Chlsenius tomentosus as enemy of May 
Beetles, 126. 
Chuck-will’s Widow as enemy of White 
Grubs, 123. 
Click Beetles, 30,39. 
as food of Birds, 47. 
Clivina impressifrons,8. 
description,15. 
Clover, 30,127. 
as food of Pale-striped Flea-beetle,22. 
in rotation as measure against White 
Grubs, 128. 
blossoms as food of adult Southern Corn 
Root Worm,148. 
as food of May Beetles. 115. 
infested by Geoica squamosa,99,100. 
by Sorghum Mealy Bug, 107. 
rarely damaged by White Grubs,114. 
Red, blossoms of, as food of adult North¬ 
ern Corn Root Worm,158,160,161. 
Seed Midge, XI. 
Coal-tar, 76. 
Coccidae, 106. 
and Aphididae, 55-108. 
Coccinellid larvae in nests of Ants, 100. 
-c 
Coccus sorghiellus, 106,107. 
Cockchafer Grub, 110. 
Cockchafers, 129, 130. See under White 
Grubs. 
Cockle-bur, 33. 
as food of Pale-striped Flea-beetle, 22. 
infested by Sorghum Mealy Bug, 107. 
Coleopterous larva infesting roots of Purs¬ 
lane, 157. 
comma, Agonoderus, 13. 
communis, Melanotus, 8,32,30,41,42,43,44,55. 
Composite, flowers of, as food of adult 
Northern Corn Root Worm, 158. 
Comstock, J. H., 36, 37. 
Comstock, J. H., and Slingerland, M. V., 34, 
35, 37. 39, 41, 45, 47, 48, 49. 
Cone-flower roots, pupae of Southern Corn 
Root Worms among, 148. 
congrua, Lachnosterna, 139,140,142. 
Copperas and chloride of lime solution for 
protecting Seed-corn, 49. 
Cordyceps, 47. 
melolonthae as parasite of White Grubs, 
126. 137. 
Corn Bill Bugs, 5. 
classification of injuries to, 7. 
indications of injury, 4,52. 
injuries to the roots, 52. 
synopsis of, 53. 
detailed discussion, 55-165. 
injuries to the seed in the earth, 7-51. 
synopsis of, 8. 
Leaf Aphis, 74. 
characters distinguishing from Corn 
Root Aphis, 82. 
disappearance in fall, 73. 
earliest appearance of, 70. 
relation to Corn Root Aphis, 69. 
transfer to roots of other plants, 74. 
Moth, 6. 
Mealy Bug, 53. See Sorghum Mealy 
Bug. 
number of insect species injuring, 3. 
Plant-lice, 52. See under Plant-lice. 
Root Aphis, 4,5,52,53,56,57,58-85. 
Ants attendant upon, 82-85. 
autumnal brood, food plants, 65. 
description, 80. 
characters distinguishing 
from Aphis maidis, 82. 
distribution. 58. 
economic procedure, 75-80. 
breaking up nests of Ants, 78. 
starvation experiments, 79. 
summary, 79. 
fertilizers and insecticides for,76. 
fungus disease, 74. 
injury to other plants than corn, 
60. 
life history, 62. 
migration to uninfested fields. 65, 
natural enemies, 74. 
number of generations, 63. 
of moults, 64. 
