vill ILLUSTRATIONS 
FIG. : PAGE 
15. Newly-hatched Chick swimming. (Drawn by Mr. Charles 
Whymper, after instantaneous photograpbs and a sketch 
by theauthor). 2. 6 6 6 ee ee ee 85 
16. Nestling Megapode. (From Dr. R. Bowdler Sharpe’s “ Wonders 
of the Bird World.” Wells Gardner). . . . . . . 87 
17. Cuckoo ejecting Meadow Pipit. (From Mrs. Hugh Black- 
burn’s sketch in “ Birds from Moidart.” David Douglas) . 91 
18. Leaf-case of Birch-weevil . . . . . . . . . «. . 121 
19. Solitary Wasp using a stone as a tool. (After Plate V. in 
Dr. Peckham’s “Solitary Wasps”). . . . . . . « 127 
20. Spiders placed by Solitary Wasps in crotches of branching 
stems. (After Plate X.in Dr. Peckham’s “Solitary Wasps”) 133 
21. Fox-terrier lifting the latch of a gate. (Drawn by Mr. Charles 
Whymper, after a photograph by Miss Alice Worsley) . . 145 
22. Cage used by Dr. Thorndike. (After figure in “ Animal 
Intelligence,” Psychological Review, 1898) . . . . . 148 
22, Diagram illustrating Dr. Thorndike’s Experiments. (Based 
on data given in his monograph on “ Animal Intelligence”) 150 
24. Wood ant. (From Shipley’s “Invertebrates.” A. & C. Black) 207 
25. Beetle soliciting food from Ant. (After Wasmann. Enlarged) 213 
. 26. Honey-pot Ant. (Enlarged) . 2. © 2. 2... 85 
