770 Wisconsin Academy of Sciences, Arts, and Letters. 
INDEX TO HOSTS. 
Abies balsamea, 763. 
Acer dasycarpum, 34. 
Actaea rubra, 714. 
Agropyrum caninum, 200. 
Agropyrum repens, 200. 
Agrostis alba, 768. 
Alisma Plantago, 490. 
Ain us incana, 662. 
Althaea rosea, 742. 
Ambrosia artemisiaefolia, 503, 665. 
Ambrosia trifida, 96, 537, 665. 
Amelanchier, 754. 
Ampelopsis quinquefolia, 596a. 
Andropogon furcatus, 219. 
Andropogon scoparius, 219. 
Anemone nemorosa, 679. 
Anemone Pennsylvanica, 14. 
Aphides, 667. 
Aralia racemosa, 531. 
Arenaria lateriflora, 771. 
Aspidium Thelypteris, 758. 
Asprella Hyst'rix, 64, 738. 
Aster puniceus, 13. 
Betula nigra, 701. 
Betula papyrifera, 701. 
Betula pumila, 694, 755. 
Bidens cernua, 10, 665, 689. 
Bidens connata, 665. 
Bidens frondosa 665, 720. 
Bluebottle fly, 666. 
Caddis flies, 670. 
Calamagrostis Canadensis, 699, 721, 722. 
Caltha palustris, 49. 
Carex aurea, 558. 
Carex cephaloidea, 586. 
Carex filiformis latifolia, 767. 
Carex gracillima, 586. 
Carex longirostris, 747. 
Carex lupulina, 767. 
Carex Pennsylvanica, 558. 
Carex umbellata, 558. 
Carex utriculata 767. 
Ceanothus Americanus, 663. 
Ceanothus ovat’us, 685, 761. 
Cerastium viscosum, 406. 
Chelone glabra, 276. 
Chenopodium album, 719. 
Chironomus, 668. 
Clematis Virginiana, 683, 696. 
Cnicus lanceolatus, 407. 
Comandra umbellata, 751. 
Coprinus comatus, 634. 
Cornus stolonifera, 718. 
Crataegus, 527. 
Cryptotaenia Canadensis, 739. 
Cyperus Houghtoni, 586. 
Cypripedium acaule, 687. 
Cypripedium pubescens, 687. 
Cystopteris bulbifera, 217. 
Dahlia, 48. 
Desmodium paniculatum, 37. 
Diervilla trifida, 707. 
Dracocephalum parviflorum, 26, 723. 
Dulichium arundinaceum, 740. 
Eatonia Pennsylvanica, 741. 
Echinospermum Virginicum, 531. 
Eleocharis palustris, 735. 
Elodes Yirginica, 715. 
Elymus> Canadensis, 200. 
Elymus st’riatus, 200, 229. 
Elymus Yirginicus, 229. 
Epigaea repens, 688. 
Epiiobium angustifolium, 304. 
Eragrostis reptans, 251. 
j-rigeron annuus, 10, 130. 
Erigeron Philadelphicus, 91, 130. 
Erigeron strigosus, 130. 
Eupatorium perfoliatum, 531. 
Floerkea proserpinacoides, 673. 
Galeopsis Tetrahit, 724. 
Galium Aparine, 22. 
Galium asprellum, 190. 
Galium trifidum, 312. 
Glyceria fluitans, 700. 
Gratiola Yirginiana, 725. 
Gyrinus, 675. 
Heliopsis scabra, 48. 
Ilordeum jubatum, 770. 
House flies, 669. 
Hypericum punctatum, 732. 
Hypericum virginicum, 715. 
