INDEX. 121 
Page. 
Setophaga ruticilla, enemy of Cercopidae 27 
Jassidae 30 
Sialia currucoides, enemy of Jassidae 30 
m. occidentalis, enemy of Jassidae 30 
sialis, enemy of Jassidae 30 
' ' Silver top " following attacks by leafhoppers and Thrips striatus 13 
Sitta pygmsea, enemy of Cercopidae 27 
leafhoppers 26 
Soy beans, food plant of Agallia sanguinolenta 16 
Empoasca mali 16, 44, 100, 101 
Sparrow, field (see also Spizella pusilla) . 
enemy of leafhoppers 26 
lark (see also Chondestes grammacus) . 
enemy of leafhoppers 26 
Lincoln (see also Melospiza lincolni). 
enemy of leafhoppers 26 
savanna (see also Passerculus sandwichensis). 
enemy of leafhoppers 26 
sharp-tailed (see also Passerherbulus caudocutus). 
enemy of leafhoppers 26 
song (see also Melospiza melodia). 
enemy of leafhoppers 26 
swamp (see also Melospiza georgiana). 
enemy of leafhoppers 26 
tree (see also Spizella monticola) . 
enemy of leafhoppers 26 
vesper (see also Pocecetes gramineus) . 
enemy of leafhoppers 26 
Spartina cynosuroides, food plant of Hecalus lineatus 65 
Spiders, enemies of leafhoppers 34-35 
Spittle insects. (See Cercopidae.) 
Spizella monticola (see also Sparrow, tree). 
enemy of Jassidae 30 
passerina, enemy of Jassidae *. 30 
pusilla (see also Sparrow, field). 
enemy of Jassidae 30 
Spraying against Agallia sanguinolenta 106 
Athysanus obtutus 94 
Deltocephalus affinis 84 
configuraius 82 
destructive leafhopper (Athysanus exitiosus) 90 
Dr&culacephala mollipes 59 
Empoasca mail 103 
Helodiara communis 61 
inimical leafhopper (Deltocephalus inimicus) 77 
leafhoppers in general 38 
Say's leafhopper (Deltocephalus sayi) 86 
Stelgidopteryx serrijiennis, enemy of leafhoppers 30 
Stictocephala in Arizona in 1910 48 
Stipa spartea, food plant of Parabolocratus viridis 68 
Strepsiptera, species parasitic on leafhoppers 33 
Sturnella magna (see also Meadowlark). 
enemy of Cercopidae , 27 
