viii Index to Volume Y. 
Rihes floridum, pollination of 95 
Ribes gracile, pollination of 93 
Rihes oxycanthoides, pollination of 91 
Ril)es riibrum, pollination of 90 
Russel, Howland, note by 139 
Russel, Howland, on the Flora of Milwaukee County 167 
Salomonia hiflora, pollination of 39 
Salomonia commutata, pollination of 41 
Saxifraga pennsylvanica, pollination of 84 
Schizaspidia septentrionaUs- 104 
Scopionis monticola^ 56 
Sparaison gregarium* 154 
Sparaison, table of North American species 155 
Species, origin of 6 
Streptopus 7'oscus, pollination of 38 
Strong", R. INI., lecture hy 1 
Tofieldia glutiuosa, pollination of 20 
Torelle, Ellen, on fertilization of echinoderm eggs 112 
Transmission of diseases by insects 66 
Trillium cermium, pollination of 44 
Trillium erectum, pollination of 43 
Trillium grandiflorum, pollination of 42 
Trillium nivale, pollination of 43 
Trillium recurvatum, pollination of 45 
JJnifolium canadense, pollination of 37 
Uvularia grandiiiora, pollination of 21 
Vagncra raccmosa, pollination of 34 
Tagnera stellata, pollination of 35 
Vagnera trifolia, pollination of 37 
Viereck, H. L., on a new species of Psen 237 
Ward, H. L., on a new Wisconsin Weasel 63 
Weasel new to Wisconsin 63 
Weasel skins, exhibition of 67 
Williston, S. W., lecture by 67 
Wheeler, W. M., on a new guest-ant 70 
Whitman, C. O., lecture by 5 
Whitman, C. O., on the origin of species 6 
