153 
Page. 
Field com, percentage injured by boll- 
worm 22 
sparrow 115 
Fig 18 
Flicker 114 
Florida, injury by bolhvorm to early toma- 
toes in 25 
Flowers of cotton, character of injury to. . . 70 
Food, choice of, by larvse 71 
relation to larval growth 67 
Food habits, cannibalism 79 
carnivorous 80 
choice of different parts of 
cotton plant 77 
of moths.. - 94,95 
of newly hatched larvse 68 
preference of larvse for young 
fruit 72 
relative attractiveness of Up- 
land and Egyptian cottons. . 71 
Food plants of boll worm 17 
Foreign countries, boliAVorm in 19 
Forelius maccooMi 108 
Freezing, effect of, on pupse 86 
Frontina aletise 123 
armigera 123 
frenchii 123 
Galeoscoptes carolinensis 115 
Garden vegetables, scarcity of eggs on 48 
Generations, number of 98 
Genitalia of male 92 
Geographical distribution 13 
Geothylpis trichas braehydactyla 115 
Geranium 18 
Gladiolus 18 
Gluttony of moths 93 
Oenia capitata 123 
Grape 18 
Great-tailed grackle 115 
Grosbeak 115 
Ground cherry 18 
Growth of larvae during instars 64 
Guiraca cserulea 115 
Habits of moths 93, 94 
newly hatched larvse 68 
Harpalus caliginosus-. Ill 
Hatching of eggs 50 
Head casts of larvse, sizes of 65 
Heart W()nn=bollworm 13 
Hdiaiithiis sp 17 
Helicohia helicis... 127 
Heliopliila unipuiictata 104 
Heliothis conferta=Heliothis obsolcta 11. 
interjacens = Helioth is obsoleta 11 
obsolcta, wav.fascu 12 
var. Jmivaiiciiiiis 12 
var. ochracea 12 
var. rubesccns 12 
\ar.2im,brosa j2 
var. umbrosa, sub-var. cu- 
macalata 12 
pulverom=II. obsoleta 11 
punctigera = H. obsoleta 11 
Slice inea= II. obsoleta 11 
umrbosus=^II. obsoleta \&v 11 
uniformis = H. obsoleta 11 
Page. 
Hemp 18 
Hibernation of moths 104 
Hibisctcs sp 17 
Homalodisca triquetra 35, 106 
Hordeum spp 18 
Horned toad 113 
Icteria virens 115 
Ictems galbula 115 
spurius 115 
Ictinia mississip2yiensis 114 
Idaho, occurrence of bollworm in 29 
Illinois, destructiveness of bollworm in 28 
Increase in numbers during season 104 
Indian corn 17 
Indiana, destructiveness of bollworm in... 28 
Indigo bunting. 115 
Ineffective methods of bollworm control . . 132 
Infestation, progress of by generations 103 
during season 103 
Injury, character of, to corn 69 
cotton 69 
to early and late cotton compared. 74 
Insects sometimes mistaken for the boll- 
worm 105 
Instars, larval, description of 57 
Ipomxa conwmtata 17 
eggs laid on : 47 
Japan, bollworm 20 
Jimson weed 18 
Johnson grass, eggs laid on 47 
Kafir corn 18 
Kingbird 114 
Laphygma frugiperda 106 
Largus cmctus 35 
Larva, description of stages 57 
Larvse, choice of food by 71 
color variation of 56 
effect of atmospheric conditions on 
growth 66 
temperature on 66 
growth during instars '. 64 
growth of, in relation to effective 
temperatures 67 
growth of, in relation to external 
conditions 66 
growth of, in relation to food 66 
habits of newly hatched 68 
instars, duration of 63 
mortality of young individuals 78 
newly hatched, eating shells and 
eggs 51 
effect of external 
conditions on . . . 68 
number on a single cotton plant ... 78 
parasites of 119 
Late corn, planting of, in eastern part of 
cotton ) )e] t 32 
LaUiiirns o,h>r<itus 18 
LeavL's of cdttDU, chararter of injury to 70 
Leiicniiin iniipnncta. See Heliophila. 
Life cyrle, length of 97 
history, st;mmary of 40 
of larvte, length of, without food 67 
Lights, attraction of moths to 9& 
Loss, exten t of, caused by bollworm 25 
Lower Sonoranarea, injury by bollworm in. 28 
