ENGLISH: ILLINOIS TREES: THEIR INSECT ENEMIES 



85 



elm cockscomb 29 



elm cockscomb 30 



gouty oak 52, 53 



maple bladder 45 



mite, maple bladder- .... 45 



oak apple 52, 53 



phylloxera, hickory 37 



psyllid, hackberry nipple . . 35 



wool sower 52, 53 



Gall-producing 



insect 3, 53 



mite 3 



Gouty oak gall 52, 53 



Gossyparia spuria 25 



Grape 75 



Green-striped mapleworm . . 46 

 Gypsy moth 74, 75 



H 



Hackberry 35,35 



nipple gall psyllid 35 



witches'-broom .... 35, 36 



Hard maple 47 



Hawthorn 16,17,19,36 



aphid, woolly 16, 17 



leaf miner 19, 20 



Hemerocampa leucostigma . . 23 



Hickory 36, 48, 68 



bark beetle 36 



gall phylloxera 37 



horned devil 37 



Homadaula albizziae 43 



Honey locust 42, 43, 68 



Horned devil, hickory .... 37 

 Hylurgopinus rufipes .... 31 

 Hyphantria cunea 9 



I 



Ichneumonidae 47 



Ichthyura inclusa 60 



Insect enemies, potential ... 73 

 Insect 



g:all-producing 3, 53 



scale 1, 2 



J 



Jack pine 54, 57, 58 



Japanese beetle 73, 73 



June bug 48 



Juniper 6,37,38,62 



bark beetle 38 



scale 6, 37, 38 



webworm 38, 39 



K 



Kermes, oak 50, 50 



Kermes pubescens 50 



Lace bug, sycamore .... 65,66 



Lady beetle 2 



Leaf 



aphid, elm 28, 29 



beetle 



Cottonwood 60 



elm 24,25 



eater 3 



miner 51, 51 



arborvitae 6 



boxwood 14 



hawthorn 19,20 



[oak] 51 



Leafhopper 



banded elm 33 



redbud 61, 61 



Lecanium fletcheri 71 



Lepidosaphes ulmi 8 



Leptocoris trivittatus .... 11 



Lilac 40,41 



borer 7,40,41 



Linden 40 



moth, snow-white 40 



Locust 40 



black 40 



borer 40 



honey 42, 43, 68 



mite 43 



Lombardy poplar 59 



Louse (lice), plant 2 



M 



Macrosiphum liriodendri ... 66 

 Magicicada septendecim ... 48 

 Malacosoma americanum ... 12 

 Maple .... 6,14,43,47,48,75 

 aphid 



Norway- 47 



painted 47 



bladder gall 45 



bladder-gall mite . . . . 45, 45 



hard 47 



Norway 47 



scale, cottony 43, 44 



soft 43-4, 44, 45, 45 



Mapleworm, green-striped . . 46 



May beetle 48 



Mealybug 



Comstock 16 



taxus 72. 73 



Megacyllene robiniae 40 



Mimosa 48 



webworm 42, 43 



Miner 



arborvitae leaf 6 



boxwood leaf 14 



hawthorn leaf 19, 20 



[oak] leaf 51 



