146 THE SPRING GRAIN-APHIS OR 
Page. 
Aphidius confusus, parasite of Macrosiphum erigeronensis 125 
spring grain-aphis 103, 122 
sp. , parasite of spring grain-aphis 18 
prey of ants 136 
probable host of Allotria sp 128 
Aphidencyrtus aphidiphagus 126 
Megorismus sp 126 
Pachyneuron sp 127 
testaceipes, artificial introduction against spring grain-aphis, futility. 142-143 
description 104-105 
dispersion, effect of wet weather thereon 121 
influence of winds thereon 118-119 
effect of parasitism upon development of host 106-107 
fecundity of host 107-109 
fecundity 113-114 
hibernation 117-118 
hosts 115-117, 125 
identity 104-105 
larva, movement within host and manner of attaching it 
to plant 109-113 
life history 105-118 
oviposition 105-106 
parasite of spring grain-aphis 40, 103, 104-121 
parthenogenesis 114-115 
period from egg to adult 106 
synonyms 104 
temperature influences 119-121 
nndescribed species, parasite of Toxoptcra graminum in Africa 122 
Aphidoletes sp., enemy of Myzus persicx 133 
spring grain-aphis 133-134 
Aphis avenae, Allotria sp. a secondary parasite 128 
host of Aphidius testaceipes 116, 117, 125 
prey of birds 135 
Eupeodes volucris 130 
brassicx, Allotria sp. a secondary parasite 128 
Aphidencyrtus aphidiphagus a secondary parasite 127 
host of Aphelinus mali 123, 125 
Aphidius other than Aphidius testaceipes 116 
Megorismus sp. a secondary parasite 126 
currant. (See Myzus rib is.) 
gossypii, Allotria sp. a secondary parasite 128 
host of Aphidius testaceipes 116, 117, 125 
Pachyneuron sp. a secondary parasite 127 
(?), host of Aphelinus semiflavus 125 
graminum= Toxoptera graminum 16 
maidi-radieis, host of Aphidius testaceipes 125 
males, females, and eggs in North Carolina 47 
maidis, host of Aphelinus semiflavus 125 
Aphidius testaceipes 116, 125 
Pachyneuron sp. a secondary parasite 127 
prey of Baccha clavata 132 
medicaginis, host of Aphidius testaceipes 116, 125 
prey of Baccha clavata 132 
