354 ANIMAL STUDIES 



butterfly, and put them, just as they were about to change 

 into pupae or chrysalids, into various boxes, lined with paper 

 of different colors. The color of the chrysalid was found 



PIG. 215. Chrysalid of butterfly (lower left-hand projection from stem), showing pro- 

 tective resemblance. Photograph from Nature. 



to harmonize very plainly with the color of the lining of 

 the box in which the chrysalid hung. It is a familiar fact 

 to entomologists that most butterfly chrysalids resemble in 



