INDEX. Ill 
Page. 
Clover, food plant of Cicadula 6-notata 42, 43, 99 
Deltocephalus 49 
affinis 42 
debilis 42-43 
inimicus 43, 44, 73, 74, 75 
nigrifrons 44 
sylvestris 44 
iveedi 44 
Empoasca mali 16, 100, 101 
Phlepsius irroratus 96 
Thamnotcttix geminatus 96 
Colinus virginianus (see also Bob white). 
enemy of Deltocephalus sp 31 
Diedrocephala sp 28 
Homalodisca coagulata 28 
Jassidse 29 
Oncometopia lateralis 28 
sp 28 
Scolops maculosus 27 
Corn, food plant of Deltocephalus inimicus 75 
Drseculacephala mollipes 56-57 
Cowbird (see also Molothrus ater). 
enemy of leafhoppers 25 
Cowpeas, food plant of Empoasca mali 100, 101 
Crop rotation against Say's leafhopper (Deltocephalus sayi) 86 
six-spotted leafhopper (Cicadula 6-notata) 100 
Cultural methods against leafhoppers 35 
six -spotted leafhopper ( Cicadula 6-notata) 100 
Cyrtonyx montezumse, enemy of Jassidge. 29 
mearnsi, enemy of Phlepsius arcolatus 31 
Danthonia spicata, food plant of Deltocephalus melscheimeri 44 
DelphacinaB, inclusion among leafhoppers 50 
Deltocephalus abdominalis in Michigan in 1910 50 
origin 17 
affinis, crops affected 15-16 
description 83 
distribution 82-83 
early history 82 
in Colorado in 1910 49 
Michigan in 1910 50 
Minnesota in 1909 42 
Washington State in 1909 43 
Yellowstone Park in 1909 42 
life history 83-84 
remedies 84 
apicatus in Ohio in 1909 44 
configuratus, crops affected 15-16 
general account 80-82 
in North Dakota in 1909 42 
debilis in Yellowstone Park in 1909 42-43 
name wrongly applied to Deltocephalus affinis 82 
origin 17 
Jlavicosta in North Carolina in 1909 46 
prey of Chsetura pelagica 31 
29460° Bull. 108 12 8 
