179 



Life history — Continued. Page. 

 Food habits — Continued. 



Location of food supply by weevils 56-57 



Mexican tree cotton attacked 63, 64 



Molasses, tests for hibernated weevils 71-74 



Relative attractiveness, various cottons 61-64 



Sweetened water on plant, effect upon feeding of weevils 72-73 



Sweets, attractiveness of . - .. 70-72 



Sweets, possibility of baiting with 70-74 



Habits, feigning death 74 



Larva 34-38 



Cells. See Pupal cells formed in bolls. 



Description of larva . 34-35 



Duration of stage, range and temperature influence 36-37 



Growth, with measurements at full size 35 



Length of larval stage. See Duration of larval stage. 



Molting, description of process 35-36 



Molts, number during larval stage. 35 



Pupal cells formed in bolls 37 



Pupation, description of molt _ . 37-38 



Oviposition 77-92 



Act described 85 



Activity in different parts of day 81-83- 



Age of beginning 77, 90 



Effects of oviposition 89-90 



Falling of squares 89-90 



Flaring of squares 89 



Examination of squares before ovipositing 77-78 



Original habit of ovipositing mostly in bolls 90-91 



Parthenogenesis, does it occur? 91-92 



Period of oviposition 90 



Place of oviposition 83 



Position of weevil during act of 83-84 



Rate of oviposition 86-87 



Average „ 86-87 



Maximum 87 



Selection of uninfested squares for 78-81 



Field observations 80-81 



Laboratory observations 79 



Stimulated by abundance of squares 87-88 



Time required in complete act 85-86 



Warts, relation to oviposition 88-89 



Pupa 38-39 



Duration of stage 38-39 



Relation of size to larval food supply 41-42 



Reproduction 74-103 



Attraction of sexes 76 



Copulation, age of beginning 75 



Copulation, sexual attraction and duration of 76 



Dependence of egg production upon food from squares 112-113 



Development 92-103 



Broods or generations, number annually _ 95-96 



Generations. See Broods or generations. 



In squares which never fall 92-93. 



Length of life cycle. See Life cycle, period of. 



