INDEX 



Staphulinidse, 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 



Tebanidx, 161 



Teneidx, 140 



Texas, State flower of, 200, 206 



Thalictrum, 194 



Thalspi, 230 



Therioplectes, 104 



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

 colors of, 234 



Thomisidx, 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 



Tortricidse, 140 



Touch-me-not. 78, 80 



Trees, deciduous-leaved, 223; ever- 

 green, 38-46; red-flowered, 248; 

 white blossoms of, 239; wind-polli- 

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

 232 



Trelease, 140 



Triangulins, 186 



Trifolium 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 



Umbelliferx, 242, 261, 262 

 Urn-shaped flowers, 64 

 Utricularia vulgaris, 19 



\'anda 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, cucullata, 110; odorala, 252; 



rotundifolia, 48; tricolor, 48 

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



sweet, 252; wild blue, 48; yellow. 



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, vellow, 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 yield 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 

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



filamentosa, 143; Whipplei, 140 



Zinnia, 218; elegans, 92 

 Zygomorphous flowers, 64 



286 



