Page. 



Habits 36 



Food habits 37 



Larval 37 



Adult 37 



Male 39 



Female -^ 39 



Males and females togethei* 40 



Feeding of hibernated weevils on early cotton 40 



Increase in leaf area of cotton 41 



Effects of feeding npon 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 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 l)eginning 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 60 



Field observations ._ ... 61 



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 66 



Time required to deposit an e^^ 67 



Rate of oviposition — average, maximum 68 



Stimulating effect of abundance of sqiiares on egg deposition 69 



Relation of warts to oviposition 69 



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 



