444 E. A. ANDREWS 



beetles: certainly it may be supposed to have no nervous fac- 

 tors entering into its reactions! The dry color of the long pre- 

 served specimen was much lighter than that in the living; in 

 fact, the light color was much like no. 378 A of Klincksieck's 

 scale. 



In general, the reactions of the dead beetle were the same 

 as those of the living beetle in all that concerns change of color 

 from dark to light and the reverse. The experiments may be 

 reported as light, heat and moisture experiments, chiefly. 



Light 



When the dead beetle was left in a moist box with light shin- 

 ing from a window on one side of body, that side eventually 

 turned very light grey while the other side remained very dark 

 red, so that the contrast was most startling. Again, when the 

 dry, light beetle was put into a moist box and one side was ex- 

 posed to window light, the other side turned dark much sooner 

 than the illuminated side. 



When the dark red beetle was left in the moist box one hour 

 with light sunshine from a window on one side but with shadow 

 of opaque object on the posterior part of body, the side exposed 

 to light changed to a light color as far back as the light went, 

 while the part in shadow remained dark as did the opposite 

 side of the body. When the light was removed, the entire 

 beetle turned all dark again within ten minutes. 



When, upon the long-dried beetle, wet paper had made a 

 cross-shaped area of dark red across thorax and elytra, exposuie 

 to sunshine removed this dark color and removal of light led 

 to restoration of outlines of the cross. Exposing the dead beetle 

 to the light of tungsten bulb, led, in about ten minutes, to change 

 of color from red to light grey, while removal of light was followed 

 by return to dark color within one hour, all in a moist closed 

 glass vessel. 



The light from a frosted bulb shining upon the left side of the 

 beetle in moist air was followed by the appearance of cloudy 

 areas of light grey within a few seconds, and these clouds of 



