320 A NATURALIST IN THE GREAT LAKES REGION 



Glacial drift, 63, 64, 68; thickness of, 63 



Glacial bowlder, 60 



Glacial periods, 5 7 



Glacial period, origin of, 56 



Glacial striae, 60, 61 



Glacier, 9, 19, 20, 56; thickness of, 62 



Glencoe, 4, 1 1 



Glenwood stage of Lake Chicago, 79, 81 



Golden old man, Zizia aurea 



Gopher, see Mammals 



Granite, 75, 76 



Grape, wild, see Vines 



Grass: 



Blue-eyed, Sisyrinchiutn angustifolium 



Blue joint, Calamagrostis canadensis 



Cottony, Eriophorum gracile 



Dropseed, Sporobolus cryptandrus 



Fowl meadow, Glycera ntrvata 



Goose, Potentilla Anserine 



Marram, Ammophila arenaria 



Of Parnassus, Parnassia caroliniana 



Prairie : 



A ndropogon furcatus 



Poa triflora 



Rye, Elymos canadensis 

 Sand reed, Calamovilfa longi folia 

 Thin, Agrostis perennans 

 Switch, Panicum virgatum 

 Whitlow, Draba caroliniana 

 Yellow-eyed, Xyris caroliniana 

 Grasshopper, see Orthoptera 

 Green dragon, Arisaema dracontium 

 Gypsum, 71 



Hardness of minerals, 70 

 Hematite, 72 



Helicopsyche, caddis fly, 287, 188 

 Hemiptera, Bugs: 



Arctocorixa interrupta, water boat- 

 man, 187, 188, 239 



Belostoma, lesser waterbug, 186, 188 

 Benacus griseus, giant waterbug, 104, 



186, 188, 239 



Cicada linei, cicada, 212, 221, 222, 224 

 Gerris remigis, water skater, 187 

 Gelastocoris oculatus, toadbug, 269, 



271 



-Hydrometria, marsh strider, 187 

 Notonecta undulata, back swimmer, 



187, 1 88 



Ranatra americana, water scorpion, 

 104, 187, 239 



Hepatica, Hepatica triloba 



Hexagenia, May- fly, 289 



Honewort, Cryptotaenia canadensis 



Hornwort, Ceratophyllnm dcmersum 



Hound's tongue, Cyanoglossum officiniale 



Hudson River Valley, 18 



Hyacinth, water, Cammasia esculenta 



Hydrophyte, 95 



Hydropsyche, caddis fly, 286, 288 



Hylodes association, 150 



Hymenoptera, Ants, Bees, Wasps: 



Ammophila procera, digger wasp, 160 



Bembex spinolae, digger wasp, no 



no, 154 



Camptonotus pennsyhanicus. car- 

 penter ant, 219, 227 

 Formosa subpolitavar neogagatcs, ant, 



Lasius niger americanus, black ant, 



158 

 Microbembex monodonta, digger wasp, 



iS3, 154 



Ice, n 



Igneous rocks, 25 



Illinoian glacial period, 57, 62, 63 



Illinois River, 8, 54 



lowan glacial period, 57, 63 



Iris, Iris -versicolor 



Ischnura verticalis ponds, 179 



Ivy, poison, Rhus toxicodendron 



Jack-in-the-pulpit, Arisaema triphyllum 

 June beetle, 95 



Kames, 67 



Kansan Glacial Period, 57 



Kaolin, 71 



Katydid, see Orthoptera 



Lady's-slipper, yellow, Cypripedium 



parviflorum 



Lake Chicago, 62, 78, 80, 81, 85 

 Lake Michigan, 58, 59 

 Lakeside, 10 



Lamps His luteolus ponds, 179 

 Lava, 18, 19 

 Lead plant, Amorpha cancsccns 



