148 THE SPBIXG GRAIN"- APHIS OE 
Page. 
Chastochloa italica, food plant of spring grain-aphis in America 42, 43 
viridis, food plant of spring grain-aphis in America 42, 43 
Chaitophorus sp., host of Aphidius testaceipes 116 
Megorism us sp. a secondary parasite 12G 
Pachyneuron sp. a secondary parasite 128 
riminalis, host of Aphelinus semiflavus 123, 125 
Cheat. (See Bromus secalinus.) 
Chenopodium album, food plant of aphidid 116 
Chess, soft. (See Bromus hordeaceus.) 
Chrysopa plorabunda, enemy of spring grain-aphis 132-133 
Coccinella abdominalis, enemy of spring grain-aphis 129 
9-notata, enemy of spring grain-aphis 129 
Colopka eragrostidis, host of Aphclin us mail 123, 125 
Corn, food plant of spring grain-aphis in America 41. 43 
Europe 41, 43 
Couch grass. (See Agropyron repens.) 
Cricket, snowy tree. (See QLcanthus niveus.) 
Crop rotation against spring grain-aphis 141 
Cultural methods against spring grain-aphis 139-142 
Currant, food plant of Myzus ribis 125 
Cynodon dactylon. (See Capriola dactylon.) 
Dactylis glome rata, food plant of spring grain-aphis in America 41, 42, 43 
Europe 41, 43 
Distichlis splcata, food plant of spring grain-aphis in America 42, 43 
Drag. (See Brush drag.) 
Echinochloa crus-galli, food plant of spring grain-aphis in America 42, 43 
Eleusinc indica, food plant of spring grain-aphis in America 42, 43 
Elym us canadensis, food plant of spring grain-aphis in America 41, 42, 43 
striatus, food plant of spring grain-aphis in America 42, 43 
virginicus, food plant of spring grain-aphis in America 42, 43 
Eragrostis megastachya, food plant of spring grain-aphis in America 42, 43 
pilosa, food plant of spring grain-aphis in America 42, 43 
sp., Aphidius testaceipes swept therefrom 117 
food plant of aphidid 117, 125 
Eupeodes xolucris, enemy of Aphis avenx 130 
spring grain-aphis 130 
Fagopyrum esculentum , food plant of spring grairf-aphis in Europe 41, 43 
Fescue, hard. (See Festuca duriuscula.) 
meadow. (See Festuca clatior.) 
sheep's. (See Festuca ovina.) 
various-leaved. (See Festuca heterophylla.) 
Festuca duriuscula, food plant of spring grain-aphis 42. 43 
clatior, food plant of spring grain-aphis in America 42, 43 
heterophylla, food plant of spring grain-aphis in America 43 
ovina, food plant of spring grain-aphis in America 42, 43 
rubra, food plant of spring grain-aphis in America 43 
Fungous disease of spring grain-aphis 136 
Grass, Bermuda. (See Capriola dactylon.) 
blue. (See Poa pratensis.) 
couch. (See Agropyron repens.) 
Italian rye. (See Lolium multiflorum.) 
Johnson. (See Sorghum halepense.) 
rye. (See Elymus canadensis.) 
