146 THE SPEIXG GRAIX-APHIS OR " GEEEX BUG.'' 



Page. 



Aphidius confusus, parasite of Macrosiphum erigmmensis 125 



spring grain-aphis 103, 122 



sp. , parasite of spring grain-aphis 18 



prey of ant? 136 



probable host of AUotria sp 128 



Aphidcncyrtus aphidiphagus 126 



Megorism us sp 126 



Pachyncuron 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 



undescribed species, parasite of Toxoptcra graminum in Africa 122 



Aphidoktcs sp., enemy of Myzus pcrsicx 133 



spring grain-aphis 133-134 



Aphis avenx, AUotria sp. a secondary parasite 128 



host of Aphidius testaceipes 116, 117, 125 



prey of birds 135 



Eupcodcs volucris 130 



brassicx, AUotria sp. a secondary parasite 128 



Aphidencyrtus aphidiphagus a secondary parasite 127 



host of Aphdin us mali 123, 125 



Aphidius other than Aphidius testaceipes 116 



Mcgorismus sp. a secondary parasite 126 



currant. (See Myzus ribis.) 



gossypii, AUotria sp. a secondary parasite 128 



. host of Aphidius testaceipes 116, 117, 125 



Pachyneuron sp. a secondary parasite 127 



(?), host of Aphelinus scmiflarus 125 



gram inum=Tozopt era graminum ife 



maidi-radicis, 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 



