456 E. A. ANDREWS 



Whether, m nature, the animal changes its colors on leaving 

 the moist wood in which it lives, to assume a lighter color when 

 flying in the day or moonlight, and so is less conspicuous in both 

 environments than otherwise, and whether this purely physical 

 structure of the outermost parts of portions of its exoskeleton 

 is of any use to it, are questions whose answer awaits more thor- 

 ough study of the natural history of the insect. 



