Page. 



Food habits 48 



Larval 49 



Adult 49 



Male 51 



Female 52 



Males and females together 52 



Feeding of hibernated weevils on early cotton „ . 52 



Time hibernated weevils can exist on foliage before formation of 



squares 53 



Concentration of weevils upon most advanced plants ^ 54 



Are weevils able to locate a food supply at any considerable distance? 56 



Danger from allowing seppa to grow , 57 



Increase in leaf area of cotton 58 



Effects of feeding upon squares and bolls 59 



Destructive power by feeding 61 



Susceptibility of various cottons 61 



Has the weevil any other food plant than cotton? 64 



Insects often mistaken for the boil weevil 66 



Is cotton-seed meal attractive? 68 



Laboratory observations 68 



Field tests 69 



The possibility of baiting weevils with sweets 70 



Attractiveness of various sweets 70 



Attractiveness of sweets to hibernated weevils in laboratory 71 



Influence of sweetened water upon feeding of weevils on cotton plants 72 



Field tests for hibernated weevils, using pure molasses „ 73 



Feigning death '. 74 



Beproduction 74 



Method of making field observations upon work of weevils 74 



■ Fertilization 75 



Age of beginning copulation 75 



Sexual attraction and duration of copulation 76 



Duration of fertility in isolated females 76 



Oviposition , 77 



Age of beginning oviposition , : 77 



Examination of squares before oviposition 77 



Selection of uninfested squares for oviposition 78 



Laboratory observations 79 



Field observations 80 



Activity of weevils in different parts of the day. 81 



Place of egg deposition 83 



Position of the weevil while puncturing for oviposition 83 



The act of oviposition _ 85 



Time required to deposit an ^g 85 



Rate of oviposition — average, maximum 86 



Stimulating effect of abundance of squares upon egg deposition 87 



Relation of warts to oviposition - 88 



Effects of oviposition upon squares — flaring, falling 89 



Period of oviposition _ 90 



Original habit of depositing eggs mostly in bolls 90 



Does parthenogenesis occur?. 91 



