106 PLANT-BUGS INJUKIOUS 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 
ligata 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 
bird 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 47^8 
nymphs 41-42 
habits 41-48 
hatching of eggs 38-39 
