Cedar flamed with gasoline blast-lamp, 52. 
Cherry and the gasoline blast-lamp, 47, 52. 
as food plant of May-beetles, 143. 
infested by Elm Twig-girdler, 118, 121. 
C'hilocorus bivulnerus as enemy of Cottony 
Maple Scale, 115. 
Chinch-bug, comparative cost of various 
treatments for, 55. 56. 
experiments with fluid insecticides for, 
40—43- 
field trials with gasoline blast-lamp for, 44, 
52—56, 57—58. 
injury, barrier experiments for protection 
of Corn against, 30 — 32, 34 — 40, 
56-57. 
cost of protection of Corn against. 35, 
36, 39, 43. 55. 56, 57- 
experiments at Carbondale, 111., for 
protection of Corn against, 33 — 36. 
at Dubois and Odin, 111., for same, 
39 — 40. 
near Fairman. ill., iov same, 36 — 39. 
field experiments for protection of 
Corn against, 30 — 58. 
general summary on same, 56 — 58. 
kerosene emulsions and nii.vtures for, 32 — 
36. 40—42, 53, 55. 
or crude petroleinn, use for, in dealing 
with, 56. 
preparation and cost of coal-tar line as 
barrier against, 37 — 39, 57. 
of dusty furrow as barrier against, 36 — ■ 
37- 
whale-oil soap for, 42. 43, 57. 
Chittenden, F. H., 119, 137. 
Clover, I. 
as substitute for Timothy to eradicate 
bill-bugs, 7. 
fields, light-traps for May-beetles in, 147. 
Coal-tar line with post-hole traps as barrier 
against Chinch-bug, .. 30, 31, 34, 37 — 39, 
56 — 57- 
Coccophagus lecanii as parasite of Cottony 
Maple Scale, 114. 
Colorado potato-beetles killed by gasoline 
blast-lamp. 54. 
Common drub -Wasp as parasite of White- 
grubs, 157 — 160. See Grub -Wasp, Common. 
Coolidge, J. H., 9. 
Corn as food plant of May-beetles. 143, 145, 
146. 
barrier experiments for protection of, 
against Chinch-bug injury, 30 — 32, 34. 
bill-bugs in Illinois, article on, cited, i. 
field experiments for protection of, against 
chinch-bug injury, 30 — 58. 
injury to, by timothy bill-bugs (Spbe- 
nophorus spp.), i — 7. 
extent, general effect, and total 
amount of, 3 — -6. 
methods of prevention of, 6 — 7. 
Corn, injury io, etc. — C'oiiiiniteii. 
summary of investigation of, 7. 
light-traps for May-beetles in, 147. 
nature and extent of injury to, by White- 
grubs illustrated, 166. 
Koot-aphis, additional miscellaneous ob- 
servations on, 24 — 26. 
and attendant ants, comparative reduc- 
tion of numbers of, 18. 
breeding-cage experiments witii, and with 
eggs of, 26. 
comparative tabular exhibit of results of 
treatment of ground for, 29. 
early treatment of soil for control of, 
26, 27. 
effect of drouth on attack of, ig. 
of once and twice disking ground for, 
27, 28, 29. 
on, of change of crop from Corn to 
Oats, 20 — 24, 28. 
field experiments on the, 8 — 29. 
in 1904, 8 — 13. 
in 1905, 13—26. 
Finnegan cultivation experiment for, 
19 — 20. 
tabular abstract of, 20. 
Galesburg cultivation experiment for, 9 
— 1 1, 
tabular abstract of, 11. 
general discussion of results of cultiva- 
tion experiments for, 26 — 29. 
Harvel cultivation experiment for, 11 — 
13- 
tabular abstract of, 13. 
Ilinman cultivation experiment for, 15 
— 19. 
tabular abstract of, 17. 
in plots receiving different cultivation 
and planted at various dates, 18. 
life history of, 8. 
observations on, in Thompson field, 
23^24. 
on Barto farm, 20 — 23. 
periods and succession of generations 
of, 26. 
ratio of winged to wingless specimens of, 
19, 22, 23, 24. 
scattering eggs and young of, in early 
spring, 8. 
various operations on ground in culti- 
vation experiments for, 9. 
Cotton Boll-weevil, gasoline blast-lamp used 
against, 44, 49. 
Cottonwood as food plant of May-beetles, 144. 
Cottony Maple Scale, articles on, cited, 116. 
comparative eflfectiveness of winter 
and summer treatment for, 116. 
effect of summer spraying of trees 
for, 108, 110. 
of infestation by, on trees, 102. 
food plants of, 103, 116. 
