Pat 
III 
Clover, 26, 112 
as food of Pale-striped Flea-beetle, 
9. 
in rotation as measure against | 
White Grubs, 113. 
blossoms as food of adult Southern 
Corn Root Worm, 131. 
as food of May Beetles, 101. 
infested by Geoica squamosa, 88. 
by Sorghum Mealy Bug, 94. 
Set a ay by White Grubs, 
Red, heads of, as food of adult 
oa Corn Root Worm, 139, 
Seed Midge, X. 
Coal-tar, 67. 
Coccide, 93. 
and Aphidide, 48-95. 
Coccinellid larve in nests of Ants, 88. 
Coccus sorghiellus, 94. 
Cockchafer Grub, 97. 
Cockchafers, 114, 115. 
* Grubs. 
Cocklebur, 28. 
as food of Pale-striped Beetle, 19. 
infested by Sorghum Mealy Bug, 94. 
Coleopterous larva infesting roots of 
Purslane, 138. 
comma, Agonoderus, 11. 
communis, Melanotus, 7, 28, 34, 36, 37, 
DO ads a duke 
See under White 
Composite, flowers of, as food of adult 
Northern Corn Root Worm, 139. 
Comstock, de. Eawioile oes 
Comstock, J. H., and Slingerland, M. V., 
SOoslewaas 4 OO On aller doy Age 
Cone-flower roots, pupze of Southern 
Corn Root Worms among, 130. 
congrua, Lachnosterna, 122, 123, 124. 
Copperas and chloride of lime solution 
for protecting Seed-corn, 43. 
solution for protecting same, 48. 
Cordyceps, 41. ‘ 
melolonthze as parasite of White 
Grubs, 111, 120: 
Corn Bill Bugs, 5. 
classification of injuries to, 6. 
indications of injury, 4. 
injuries to the roots, 45. 
detailed discussion, 48-145. 
synopsis of, 46. 
to the seed in the earth, 6-44. 
._ Synopsis of above, 7. 
Leaf Aphis, 65. 
characters distinguishing 
ies Corn Root Aphis, 
disappearance in fall, 64. 
earliest appearance of, 61. 
relation to Corn Root 
Aphis, 60. 
transfer to roots of other 
plants, 65. 
Mealy Bug, 46. See Sorghum Mealy 
Bug. 
number of insect species injuring, 3. 
Plant-lice, 45. See under Plant-lice, 
Root Aphis, 4, 45, 46, 48, 50-75. 
Ants attendant upon, 72-75. 
autumnal brood, food 
plants, 56. 
deseription, 70. 
characters distinguish- 
ing from Aphis 
maidis, 72. 
distribution, 51. 
Corn Root Aphis—Continued. 
economic measures, 
breaking up nests 
Ants, 68. 
starvation experiments, 
69 
65-70. 
of 
summary, 70. ne 
fertilizers and insecticides 
for, 3 
fungus disease, 65. 
injury to other plants than 
eorn, 52. 
life history, 54, 
migration to 
fields, 56. 
natural enemies, 65. 
number of generations, 5b. 
of moults, 56. 
rank as a Corn pest, 50. 
rate of multiplication, 56. 
uninfested 
relation to Ants, 57-60. ‘ 
to Corn Leaf Aphis, 
60-65 ‘ 
transfer to leat of Corn, 62. 
blight, 4, 45, 46, 52. 
lice, 3, 45, 46, 48, 50. See un- 
der Plant-lice. 
Louse. See under Corn Root 
Aphis. 
Web-worms, 5. 
Worm, Northern, 30, 48, 129, 
135-145. See under 
Northern Corn Root 
Worm. 
Southern, 47, 129-135. -See 
under Southern Corn 
Root Worm. 
WOTMS 73, 5,040, 00> 
synopsis of injuries to roots, and 
order of discussion, 46. 
Wireworm, 7, 18, 37-39, 47. 
description, 38. 
hibernation, 38. 
length of larval life, 38. 
relative abundance, 3, 7. 
Worm, 5, 21. 
corni, Schizoneura, 49, 75, 79. 
Cornus as food plant of Schizoneura 
corni, 79. 
corrosa, Lachnosterna, 123, 126. 
Corrosive sublimate for Wireworms, 43. 
Corymbites, 28. 
Corymbitini, 27, 3 
Cosmos, petals of, as food of Southern 
Corn Root Worm, 131. 
Cotton-plant blossoms as food of adult 
Northern Corn Root Worm, 
139. 
as food of adult Southern Corn 
Root Worm, 131. 
Crab-grass infested by Corn Root Aphis, 
53 
oO. 
by Woolly Grass Root Louse, 92. 
Crambus camurellus damaging !awns, X. 
erassissima, Lachnosterna, 122, 125. 
crenulata, Lachnosterna, 102, 123, 127. 
eribulosus, Melanotus, 7, 18, 28, 37, 47. 
crispus, Rumex, 53, 65. 
Crow as enemy of White Grubs, 109. 
Blac as enemy of White Grubs, 
09. 
as enemy of Wireworms, 42. 
erus-galli, Panicum, 88. 
Cryptohypnus, 28. 
Cucumber vines infested by Northern 
Corn Root Worm, 139. 
as food of adult Southern Corn Root 
Worm, 131, 134. 
Cutworms, 3, 5, 44. 
