on colour-reldtion. 23l 



two were somewhat darker green than tlie re«t, and one 

 was very dark oHve-green, with a brown head. 



July 15th, — The larvae from this time fed only at 

 certain times, generally about three times a day, and in 

 the intervals of feeding all descended from the leaves, 

 and buried themselves in the earth on the floor of the 

 cylinder. 



July 21st. — The third ecdysis took place, and the 

 larvffi all became of varying shades of brownish green, 

 olive-green, and dirty greenish brown ; all wore fairly 

 dark, but these were darker than the rest. Their heads 

 were also brown, and the longitudinal striping was 

 much darker. The larvae were large, and getting 

 crowded ; so I removed the seven darkest to cylinder 4, 

 giving them dark green leaves and a dark earth floor. 

 Eight larva3 remained in cylinder 2. 



July 26th. — The fourth ecdysis occurred. There was 

 no change of colour. The colour had not darkened or 

 altered at all since the change at third ecdysis. 



Aug. 12th.— Three larvffi pupated. 



Aug. 13th.— The last five larvae pupated. There was 

 no change of colour due to surroundings in any. 



Cylinder 4:. — July 21st. — The seven darkest larvae from 

 cylinder 2 were placed here with dark green leaves and 

 dark earth. 



July 26th. — The fourth ecdysis took place. No change 

 of colour either before or afterwards. The larvae still 

 remained slightly darker than those in cylinder 2, but 

 were otherwise like them. 



Aug. 11th. — Four larvae pupated. 



Aug. 12tli. — The last three larvae pupated. No change 

 of colour due to surroundings occurred in any. 



The larvcB ivith green surroundings. 



Cylinder 1.— July 7th. — Fourteen larvae in the second 

 stage were left in cylinder 1, with light green leaves 

 only ; no earth was given to these. 



July 13th. — The second ecdysis took place. The larv^ 

 changed to a green more or less dark, with slightly 

 lighter longitudinal striping ; heads yellow to yellowish 

 brown, as in the larvae with dark surroundings. From 

 this time the larvie adopted stated times of feeding, like 

 the others, and in the intervals descended from the 



