FACING 



FIGURE PAGE 



114. — White card against sky. Photograph 154 



115. — White card against ground. Photograph 154 



116. — Imitation Egret, without plumes. Photograph . . . 156 



117. — Imitation Egret, with plumes, against dark. Photograph 156 



118. — Imitation Egret with plumes, against white. Photograph ........ 156 



119. — Diagram illustrating the effect of certain patterns. Drawing . . . . . 159 



120. — Fifty little pictures, mainly photographic, of real holes, and of counterfeit holes in animals' 



patterns 159 



121. — Green Snake, right-side-up. Photograph . . . 174 



122. — Green Snake, inverted. Photograph 174 



123. — Rattlesnake among stones. Photograph and drawing 174 



124. — Brown Lizard on apple-tree bark. Photograph 180 



125. — ) 



^ > Brown Wood Frog among dead leaves. Photographs 180 



127. — Common Garden Spider on its web. Photograph . 180 



128. — Orange-tip Butterflies on cow-parsley. Photograph ........ 216 



129. — Butterflies on vegetation. Photograph 216 



130. — Light butterfly with shadow-colored fore-wing borders. Photograph . . . .216 



131. — Small Tortoise-shell Butterfly on pebbles. Photograph 216 



132. — Ocellus on a butterfly -model. Photograph . 230 



133. — Moths, Butterfly, and Pheasant's tail, on dead leaves, etc. Photograph .... 230 



134. — Two Grass-moths, on grass. Photograph .......... 235 



135. — Tiger-moth on sprig of Box. Photograph 235 



136. — Four Bark -moths, on Maple bark. Photograph . 235 



137. — Two Bark-moths on Pitch Pine. Photograph 235 



138. — Three Bark -moths, on Gray Birch. Photograph . 235 



139. — Pandorus Sphinx Moth on a White Birch tree. Photograph 237 



140. — Bits of sphinx-moth pattern and of bark-pattern intermingled. Photographic . . -237 



xix 



