viii LIST OF DESIGNS 



Page 



Tiger-beetle 68 



The Spider Victim 70 



Filling the Spider s Grave 77 



Black Digger-wasp /j> 



Black Digger-wasp and His Victim, Showing the Egg of 



the Wasp Attached 75 



Protecting the Burrow while Searching for Prey .... /p 



The "Cow-spit" Mystery Disclosed 81 



The Tigers Head, from the Victims Stand-point. . . . 84 



Initial. Branch of the Bittersweet 87 



A Bittersweet Covey go 



Flushing the Game 92 



Specimen Twig p^ 



Building Froth-tent ....-..-. 100 



Butterflies and Flowers . . /qj 



A Row of Stamens 106 



The Parts of a Flower . 109 



Historical Series, Showing the Progress of Discovery of 



Flower Fertilization no 



The Garden Sage 120 



Cross-fertilization of the Sage 121 



Elastic Stamens. Anthers Inserted in their Pockets . . . 124. 



Elastic Stamens of Mountain-laurel 125 



Andromeda Ligustrina -. 127 



Fertilization of Andromeda 128 



Jhe Laurel . ijo 



Cross-fertilization of the Blue-flag ijf 



Blue-flag ij2 



Pogonia and Devil' s-bit ijj 



Devils-bit. 134 



Horse-balm. Collinsonia . . . . . . . . . . . . . ijj 



Cross-fertilization of the Horse-balm Flowers in Various 



Stages, and in the Order of their Visitation by the Bee ij6 



The Cone-flower 7jy 



