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Page. 



Habits . 36 



Food habits . 37 



Larval . _ _ , 37 



Adult :_.._ 37 



Male 39 



Female 39 



Males and females together 40 



Feeding of hibernated weevils on early cotton 40 



Increase in leaf area of cotton 41 



Effects of feeding upon squares and bolls 43 



Destructive power by feeding 44 



Susceptibility of various cottons - 44 



Has the weevil any other food plant? 47 



Insects often mistaken for the boll weevil 48 



Is cotton-seed meal attractive ? 50 



Laboratory observations 50 



Field tests I 51 



The possibility of baiting weevils with sweets 52 



Attractiveness of various sweets 52 



Attractiveness to hibernated weevils in laboratory . _ 53 



Influence of sweetened water upon feeding of weevils on cotton 



plants 54 



Field tests for hibernated weevils, using pure molasses 55 



Feigning death 56 



Reproduction 56 



Method of making field observations upon work of weevils : _ .. 56 



Fertilization 57 



Age of beginning copulation 57 



Sexual attraction and duration of copulation 57 



Duration of fertility in isolated females 58 



Oviposition 58 



Age of beginning oviposition _• 58 



Examination of squares before oviposition 59 



Selection of uninf ested squares for oviposition 59 



Laboratory observations 00 



Field observations 01 



Activity of weevils in different parts of the day 63 



Place of egg deposition 65 



Position of weevil while puncturing for oviposition 65 



The act of oviposition 00 



Time required to deposit an egg 07 



Rate of oviposition — average, maximum 08 



Stimulating effect of abundance of squares on egg deposition 09 



Relation of warts to oviposition 09 



Effects of oviposition upon squares — flaring, falling 70 



Period of oviposition 72 



Does parthenogenesis occur ? 72 



Development 73 



Percentage of weevils developed from infested squares 73 



Development of weevils in squares which never fall 73 



Length of life cycle 74 



Broods or generations 75 



