L78 THE MEXICAN COTTON-BOLL WEEVIL. 



Page. 



Hark, hibernation shelter for boll weevil.. 101 



Bartramia longicauda, enemy of boll weevil 146 



Bermuda grass, duration of life of boll wee\ Lie f< d thereon 18 



Bindweed. (See Convolvulus repens.) 



Birds inimical to boll weevil 145-146 



Blackberry, hosl plant of Anihonomus signatus 30 



Blackbird, Brewer. (See Euph-agus cyanocepltalus.) 

 red-winged. (See Agelaius phceniceus.) 

 rusty. (See Euphagus carolinus.) 



Bloodweed, duration of life of boll weevils fed thereon 48 



Blue jay. (See Cyanocitta cristata.) 



Boll weevil, abundance, seasonal 74-85 



variations from year to year S3-85 



activity, zone of temperatures causing it 127 



adult, ability to locate cotton 41 



activity after emergence from hibernation 110-118 



attraction to various cottons 45-47 



substances 42-43 



changes after emergence 38 



color. 36 



description 35 



of teneral stage 34-35 



destructive power by feeding 42 



duration of life according to sex 50 



average 47-50 



with normal food 49 



without normal food 48—19 



effects upon squares and bolls of feeding 44—15 



emergence 38 



feeding activity 41—12 



habits of hibernated weevils 41-42 



female, characters 37 



food habits 38-50 



habits, food 38-50 



protective 38 



longevity, maximum 115-116 



of those emerging from hibernation 114-116 



male, characters 37 



movements on food plant 43—14 



number on stalks at different dates 99 



under rubbish 99 



protective habits 38 



secondary sexual characters 37 



sense of color 43 



size 35-36 



weight 36 



aestivation, zone of temperatures causing it 127 



annual movement in square miles 27-28 



bibliography 169-175 



bird enemies 145-146 



breeding habit, the one probably original 62 



broods * 74-76 



cannibalism 50 



causes for natural dissemination 87 



checked by altitude 28-29 



dryness 28 



low temperature 28 



climatic control, effect of cold 19 



drought 16 



early f r< >st 20 



influences on vitality and activities 121-122 



compensations for losses caused thereby 26-27 



control by climatic conditions ' 120-132 



parasites 120 



predators 120 



proliferation 132-135 



