106 PLANT-BUGS INJURIOUS TO COTTON BOLLS. 



Page. 



Peach, food plant of Nezara hilaris 80 



Pentatoma ligata 25 



Peas, food plant of Nezara hilaris 79 



Pentatoma ligata 25 



Pentatoma, abundant in cotton fields 11 



ligatu as a cotton insect, general account 23-73 



activity of adults in relation to temperature 35 



adults, description 25-26 



habits 43-48 



life history 29-35 



association with Largus succinctus 67 



Nezara hilaris 67 



Pentatoma sayi 47 



Thyanta perditor 47 



biid enemies 66-67 



cannibalistic habits, abnormal, of adults 47 



conspicuous position of adults when feeding 44-45 



control, artificial 67-73 



in alfalfa fields 67-68 



natural 62-67 



cost of hand picking ' 70-71 



decrease and increase in numbers during the season 48-53 



description 25-28 



destructiveness 20-21. 55-62 



development of nymphal stages retarded by cold 40 



distance nymphs can travel for food 42-43 



distribution 24-25 



duration of fertility 31-32 



nymphal stages as affected by cold 40 



under normal summer temper- 

 atures 39-40 



egg laying 43-44 



capacity 31 



monthly and daily rate and relation to temperature . 30 



rate of deposition of individual eggs 44 



eggs, description 26 



effect of low temperature on vitality 38 



hatching 38-39 



incubation period 35-37 



life history 35-39 



number per batch 44 



proportion hatching in laboratory , 37 



enemies 62-67 



feeding of adults 44-47 



nymphs 41-42 



fertility, duration 31-32 



fertilization 43 



flight 48 



food plants 25 



gregariousness of adults 47-48 



nymphs 41-42 



habits 41^8 



hatching of eggs 38-39 



