Door-Step Neighbors: --Chronicle of a day, 58; disappearing holes, 59, 16; "ant-holes"; a danger signal; an unhealthy court, 61; a transformation, 62; an experiment; method of excavation, 63; a stalwart worker, 64; an uncouth nondescript; spider-like legs, 66; crawls on his back, 67; a tiny black wasp; a spider-catcher, 69; resting on her wings; inspecting her burrow, 70; manner of burying her prey; skilful workmanship, 71; a new-comer; her wire-like waist; digging her tunnel, 72; manner of working; sound of labor, 74; covering her tracks; opening the tomb, 76; fresh living food, 77; carrying seven times its weight; peculiar features of stone-piling, 78; color of the wasp, 79; the spume-bearer, 81; nomadic blossoms; a sack bearer, 83; winter quarters, 84. Epeira, field spider, 8. Epiphytes, air-plants, 181. Evening primrose, its golden necklace, 118. "Fertilization of Flowers," 116; wrong theory, 114. Fertilization of orchids, 105, 183. Flies: --Robber, 8; bluebottle, 8; harvest ichneumon, 45, 77, 96. Foxes, wild gambols of, 6. Froghopper. See Spume-bearer (_Aprophora_), 82. Gaertner, recognizing the theory of cross-fertilization, 115. Genesta, its reception of insects, 118. Geranium, wild (_G. sylvaticum_), 112. Gilbert, concerning cuckoo's eggs, 25. "Gobs," 80. Gray, Asa: --Demonstration concerning orchids, 184; surmise concerning the withdrawal of pollen, 188; orchid structure, 190. Grew, Nehemias, discovery concerning pollen, 110; discoveries about pollen, 113; first step in progress, 116. Habenaria flava: --Yellow-spiked, 203; _H. lacera_, ragged, 200; _H. orbicularis_, showy, 194, 199; _H. psycodes_, purple-fringed, 200; _H. mascula_, 189. Heath, its distinguishing characteristics, 123. _Hemiptera_, bugs with sucking beaks, 81. Herbert: --A follower of Sprengel, 108; recognizing the principle of cross-fertilization, 115. "Honey-dew Picnic": --Gathering of the clans, 153; a selected spot, 154; a motley assemblage, 155; an outlaw, 157; a finish fight, 158; funeral baked meats, 164; gathering his grist; the founder of the feast, 158. Honey-guides, 112, 129. Hornets: --Its heavy load, 9; on the watch, 15; "solitary," 17; queer home of, 18; great sand, 77; black paper, 161. Horse-balm (_Collinsonia_), its singular shape, 136; manner of bee's approach to, 138. Huber: --On insect slavery, 151; on the cultivation of the aphides, 166. Insect Fertilization, 115. Jack-in-the-Pulpit, detaining its guests, 119. Jardine, Sir William, concerning cuckoo's eggs, 32. Jenner, Dr., habits of the young cuckoo, 35. Knight, Andrew: --On the divination of flowers, 108; theory of cross-fertilization, 115.