The significance of these results has been pointed out 

 already (see p. 351). 



It is interesting to note that the larvae varied greatly ; 

 this was also the case in some of the larvae exposed to 

 dim light (XXL), while others were very uniform (XX., 

 XXIII.). 



E. Transference Experiments. 



Experiments XXVI. and XXVII. 



XXVI. 



First contained in XIV. ; then in 

 cylinder. 



Height, 176 mm. 

 Internal diameter, 71 mm. 

 Approximate capacity, 700 cc. 

 Transferred from green to dark 

 surroundings for the last stage. 



July 26. — 4 green larvje about 

 32-0 mm. long, just before changing 

 their last skins, transferred from 

 XIV. to another cylinder with abun- 

 dant dark twigs intermixed. 



July 27.— All but 1 were changing 

 skins, and all were resting on the 

 dark twigs. 



July 30. — Same; all on brown 

 twigs, and as bright green as ever. 



July 31. — Same; still resting on 

 brown twigs. A fifth bright green 

 larva, small in last stage but one, 

 transferred from XIV. to this cylin- 

 der. 



Aug. 1. — All resting on brown 

 twigs, and all bright green. 



Aug. 5. — The 4 larvaj transferred 

 July 26 had ceased feeding, remain- 

 ing bright green, with a faint dorsal 

 line. The 1 small larva transferred 

 July 31 was changing last skin, and 

 was bright green, with distinct 

 dorsal line. There was no further 

 change. 



XXVII. 

 First contained in II. ; then in 

 cylinder. 



Height, 86 mm. 

 Internal diameter, 61 mm. 

 Appro.ximate capacity, 250 cc. 

 Transferred from dark to green 

 surroundings for last stage, and part 

 of last but one. 



July 27.-3 brown larva;, about 

 24-0 mm. long, transferred from II., 

 where they had been subjected to 

 brown surroundings, to green leaves 

 and twigs alone of food-plant. 



July 31.-2 

 1 at beginning 

 brown. 



changing last skin, 

 of last stage ; still 



Aug. 5. — The 3 larvie were now 

 more than half -grown in last stage, 

 and had become rather lighter than 

 those remaining in II. The most 

 changed was painted. 



