320 A NATURALIST IN THE GREAT LAKES REGION 



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



Glacial bowlder, 60 



Glacial periods, 57 



Glacial period, origin of, 56 



Glacial striae, 60, 61 



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



Glencoe, 4, 1 1 



Glen wood stage of Lake Chicago, 79,81 



Golden old man, Zizia aurea 



Gopher, see Mammals 



Granite, 75, 76, 77 



Grape, wild, see Vines 



Grass: 



Blue-eyed, Sisyrinchium angnstifolium 



Blue joint, Calamagrostis canadcnsis 



Cottony, Eriophorum gracile 



Dropseed, Sporobolus cryptandrus 



Fowl meadow, Glyccrci ncrvata 



Marram, Ammophila arenaria 



Of Parnassus, Parnassia caroliniana 



Prairie : 



Andropogon 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 



Helico psyche, 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 



Cicadalinei, 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 canadcnsis 



Hornwort, Ceratophyllum demersum 



Hound's tongue, Cyanoglossum ojficinialc 



Hudson River Valley, 18 



Hyacinth, water, Gammas ia csculenla 



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 pennsylvanicus, car- 

 penter ant, 219, 227 



Formoso subpolitavar neogagatcs, ant, 

 252 



Lasius nigcr americanus, black ant, 

 158 



Microbembex monodonta, digger wasp, 

 153, 154 



Ice, ii 



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 toxicodcndroti 



Jack-in- the-pulpit, Arisaema triphyllum 

 June beetle, 95 



Kames, 67 



Kansan Glacial Period, 57 



Kaolin, 71 



Katydid, see Orthoptera 



Lady's-slipper, yellow, Cypripcdium 



parviflorum 



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

 Lake Michigan, 58, 59 

 Lakeside, 10 



Lamps His liileolus ponds, 179 

 Lava, 18, 19 

 Lead plant, Amorpha cancscens 



