INDEX 



Staphi/Iinidse, 188 



Starch, 226. 227 



Stickseed, 250 



Stonecrop, 238 



Strawberries, 60; bee of, 112; insect- 

 pollination of, 271 



Sumac, 122 



Sunbirds, 247 



Sunflower, 92, 112, 182, 232 



Sweet-fern, 24 



Sweet pea, 50, 51, 217 



Sweet-william, 223, 242; butterfly- 

 flower, 128 



Syrphid fly, 19, 36, 96, 160, 161, 171, 

 172; resemblance of, to bees and 

 wasps, 173 



Tear-thumb, 96 



Tcbanidse, 161 



Tcncidse, 140 



Texas, State flower of, 200, 206 



Thaliclruyn, 194 



Thalspi, 230 



Therioplectes, 104 



Thistles, 132, 182, 232; Canada, 96; 

 colors of, 234 



Thomisid3e, 102, 104 



Thomson, 160 



Thorn-apples, 139 



Thorn-bush, 228 



Thoroughwort, 132, 138 



Tick-trefoil, 198, 199, 201 



Tiger-beetle, 186 



Timpe, 237 



Toadflax, 56 



Tobacco, species of, moth-pollinated, 

 154 



Tomatoes, 228; beetles on, 185 



Tnrtricidse, 140 



Touch-me-not. 78. 80 



Trees, deciduous-leaved, 223; ever- 

 green, 38-40; red-flowered, 248; 

 white blossoms of, 239; wind-polli- 

 nated, 20, 21, 24-28; yellow-flowered, 

 232 



Trelease, 140 



Triangulins, 186 



TrifoUum pratense, 70 



Trillium, 162, 256 



Trumbull, John. 190 



Trumpet-flower, 76, 77 



Tubes, floral, length of, 121 



Tulips, 224, 228, 230 



Tupelo, 116 



Turtle-head, 56, 59; wild bumblebee- 

 flower, 78; nectar-guides on, 65 



Twinflower, 18, 174 



Tyndall, 226 



Umbel ] if ersp, 242, 261, 262 

 Urn-shaped flowers, 64 

 Utricularia vulgaris, 19 



Vanda cxrulea, 64, 136, 252 

 Ventura, California, 92 

 Veratrum viride, 227 

 Verbascum, 194 



Verbena hastata, 94 



Verbesina, 121, 242 



Veronica, 172, serpyllifolia, 172 



Vertical flowers. 60 



Vervain, purple, 94 



Vespa germanica, 104 



Vetch, 102, 122, 222; color change in, 



56 

 Viburnum, 180, 190, 194, 222 

 Vicia, Cracca, 56, 122; Faba, 256 

 Vincent, 267 

 Vine-flowers, 202, 227 

 Viola, cucuUata, 110; odorala, 252; 



rotundi folia, 48; tricolor, 48 

 Violet, bee of, 110; colors of, 64, 237; 



sweet, 252; wild blue, 48; yeUow. 



48 

 Vogt, Carl, 70 



Waite, 265-267 



Wallace, Alfred Russel, 125, 206, 239 



Walnut-tree, 24, 202 



Wasp-flowers, 56 



Wasps, 47; captured by spider, 104; 

 punctures made by. 102 



Water-lilies, yellow. 230; insects found 

 on. 106. 108. 185 



Water-pollinated plants, 223 



Water- tigers, 186 



Waugh, 270 



Weeds, 36, 38 



Weevils. 190. 192 



White flowers, 150, 221-224, 236, 244,- 

 common, 238; clustered, 242; indi- 

 vidual. 244 



White. Gilbert, 21 



Wieland. 224 



Willow-herb. 96 



Willows, bee on, 112; conspicuousness 

 of, 203; pollen and nectar vield of, 

 119; pollination of, 21, 23, 24; 

 yellow hue of, 234 



Wind-pollinated flowers, 202, 262; 

 colors of, 223; hybrids in, 277; num- 

 ber of, 36, 223 



Wind-pollination. 20-46, 223; oldest 

 method of pollen dispersion, 46 



Winter. William. 1 



Wisconsin, bees in, 120 



Witch-grass, 36 



Wood-betonv, 84 



Woodbine. 228 



Wood-borers, 190-192 



Wormwood, 227; Roman, 38 



Xanthophyll, 228, 232 

 Xenoglossa pruinosa, 114 



Yellow flowers, 172, 173, 221-224, 228- 



237; color variation of, 236, 237; 



form of, 232; number of, 232, 234; 



in primitive flora. 230 A 



Yucca, moth-pollinated, 124, 140, 143k 



filamentosa, 143; Whipplei, 140 ^^ 



Zinnia, 218; elegons, 92 / 



Zygomorphous flowers, 64 ' 



286 



311 HB" 



12/87/9B 41245 



