INDEX 



243 



229 ; four captives, 230 ; its honey 

 trap; its tenacious grip, 233: an 

 assortment of victims ; cumber- 

 some handicap, 234 ; a wholesale 

 destroyer, 235. 



Mint family, 122. 



Mnio-tiltidcc, summer yellow - bird, 



47- 



Moccasin-flower {Cypripediiwi acau- 

 le], 205. 



Moths: Twilight; sphinx, 1 18, 190, 

 220 ; grape-vine, 160. 



Mountain laurel : Showers of pol- 

 len of ; curious construction of 

 flower of ; withers if brought in- 

 doors, 124 ; character of the pol- 

 len, 125. 



Mouse, motley collection of food of ; 

 mischief of, 7. 



Miiller, Hermann : On the divina- 

 tion of flowers, 108 ; on defective 

 observation, 114 ; the relations be- 

 tween the flower and insect, 116 ; 

 on fertilization, 142. 



NATURE'S EQUILIBRIUM, 39. 

 Natural observation, 57. 

 Nomadic blossoms, 83. 



ORCHIDS: Dependence on insects, 

 144; strange mechanical adapta- 

 tion ; sweet - pogonia ; perfume 

 suggesting raspberries, 145 ; in- 

 tention of the blossom, 146; adap- 

 tation for insects, 147 ; its frag- 

 rance a perfumed whisper of wel- 

 come, 148; a contrast, 172; form 

 of invitation, 173; insect comple- 

 ment, 174 ; Arethusa bulbosa, 

 175 ; theories concerning the con- 

 veyance of the pollen, 176 ; the 



most highly specialized form of 

 flowers, 180; distinguished by its 

 structure ; American varieties not 

 air-plants ; form of flower, 181 ; 

 elasticity of the pollen of the 

 SpectabiliSi 182; self - fertilizing, 

 183; American and exotic species, 

 184 ; Arethusa's fragrance, 185 ; 

 its structure, 186 ; significant 

 depth of nectar wells ; conditions 

 demanded of insects, 187; Gray's 

 surmise, 188 ; sphinx - moth its 

 only complement, 190; manner of 

 carrying the pollen by sphinx- 

 moth, 193 ; extracting the pollen 

 with a pencil ; length of the nec- 

 tary, 196 ; purple - fringed, 198 ; 

 ragged, 200 ; very exceptional 

 provision, 201 ; yellow - spiked, 

 203 ; moccasin - flower ; ladies' - 

 slipper; Venus's-slipper; the color 

 of, 205 ; distinctive character of, 

 206 ; practical experiment, 209 ; 

 imprisonment of the bee ; manner 

 of its release, 210 ; rattlesnake- 

 plantain, 213; Angraecum, its long 

 nectary, 219 ; tongue of a sphinx- 

 moth eleven inches long, 220 ; 

 nectary thirteen inches long, 223. 



" Origin of Species ": First import- 

 ant presentation of the theory of 

 cross-fertilization, 105 ; tardy ap- 

 preciation of the work, 115. 



Odynerus flavipes, wren- wasp, 10. 



Ovid, concerning hornets, 18. 



PARALLELS IN NATURE, 152. 

 Platanthera. orchid group, 192. 

 Pliny, 23. 



Pogonia ophioglossoides, sweet - po- 

 gonia, 145. 



