152 
Conotelus obscurus 127 
Copulation of moths 92 
Corn, ear worin=bolhvorm 13 
eai-s, damage to, by single larva 75 
injury to. by boll worm 21 
maturing, damage to. by single larva. 75 
number of plants infested 78 
oviposition on, by boll worm 42 
preferred food of bollworm 21 
sweet, percentage injured by boll- 
worm 22 
young, damage to, bj^ .single larva 74 
Corvus bmchyrhyncos 114 
Cotton and cowpeas, comparative acreage 
in, by States 31 
choice of different parts by larva. . . 71 
damage to, by single larva 76 
injury to, by bollworm in different 
States 23 
by bollworm in United 
States 24 
by other causes than 
bollworm 35 
in relation to farm prac- 
tice 29 
large acreage in relation to boll- 
worm injury 30 
oviposition on, by bollworm 45 
percentage injured yearly in U. S. 
by bollworm 25 
percentage injured by bollworm in 
Texas 23 
season of greatest injury to. by boll- 
worm 32 
Cowbird 114 
Cowpea 18 
Co^vpeas, eggs laid on 47 
Crab grass 18 
eggs laid on 47 
Cremnstogaster lineolata 108 
Crested flycatcher 114 
Crow 114 
blackbird 115 
Cucumber 17 
Cucurhita pepo 17 
Cucumis melo ^ 17 
sativa 17 
Cultivation, early and thorough 128 
Cultural methods 128 
Cyanociita cristata 114 
Cyanosptia ciris 115 
cyanea 115 
Dahlia 17 
Dakota, scarcity of bollworm in 27 
Damage done by single larva 74 
Datura stramonium . 18 
eggs laid on 47 
Delaware, destructiveness of bollworm in. . 28 
Belphax maidis 94 
Dendryphantes 7nd)iUs Ill 
Department of Agriculture, early investiga- 
tion of bollworm by 37 
Deromyia angustipennis 110 
umbrinus Ill 
Description of larval stages 57 
I Page 
Destructiveness in relation to life zones in 
US 25 
Diseases 124 
Distribution in relation to life zones in U. S. 25 
Dizoniasbicinctus ill 
Borymyrmex pyramicus 108 
i Drosoph ila amjicloph ila 127 
I punctulata 127 
Duration of larval instars 63 
Early fruiting cotton 129 
Eating of shells and eggs by ncAvly hatched 
larvae 51 
Ecdyses. number of 67 
Ecdysis, process of 67 
Economic .status in United States 21 
Effective temperatures, relation to growth 
of larvte 64 
relation to length 
of egg stage 52 
relation to length 
of life cycle 102 
Effective temperatures, relation to length 
of pupal stage 86 
Effective temperatures, relation to number 
of generations 102 
Egg, description of 41 
development of 50 
Egg laying, effect of fertilization on 49 
plant IS 
stage, length of 52 
Eggs destroyed by storms 55 
distribution of, on cotton plants 46 
effect of atmospheric conditions on . . . 54 
submergence on 54 
sun on 55 
hatching of 50 
in ovaries at death 49 
infertile, deposition of 49 
shrinking of 51 
number laid by a single moth 48 
parasites of 115 
percentage that hatch , 52 
Egj-ptian cotton, relative attractiveness of, 
to larvse 71 
Embryology 50 
Emergence of moths, time of 89 
Era.c bastardii Ill 
lateralis Ill 
Erigeron canadense 17 
Erythrina herbacea IS 
Eumenes bollii Ill 
Eupatorium serotinum 94 
Euphorbia corollata 47 
Euphorocera cla ripen nis 123 
Euplectrus comstocJcii 122 
Europe, bollAVOrm in 19 
Euxesta annomr 127 
Exarista ceratom iie 123 
Falso sparverius 114 
Fall plowing 128 
Farm methods in relation to bollworm 
injury 29 
FertUization. effect of, on rate of egg lay- 
ing 49 
Fertilizers 129 
