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 



Eelative attractiveness, various cottons 61-64 



Sweetened water on plant, effect upon feeding of weevils 72-78 



Sweets, attractiveness of 70-72 



Sweets, possibility oi 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 inflaenoe — 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 clay ^ ^ . 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 ovij)0&ition... . .,,. 83 



Position of weevil during act of . 83-84 



Eate of oviposition 86-87 



Average.. . 86-87 



Maximum 87 



Selection of uninfested squares ior , ..» 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. 



