^6S Professor E. B. Poulton on colmir-rclation, etc. 



now large in the 6th stage, a dark brownish-black rather 

 than the dead black of the other 4 and those still on the 

 black twigs. 



July 12th. Mature and removed. Xo further change in 

 appearance. 



CONCLUSIONS. 



In this case the grey which overspread the black 

 ground-colour of -1 larvae must be regarded as an effect of 

 the green environment during the 2 last stages. The 5th 

 larva took longer to develop, and there was a slight 

 departure from the characteristic dead black of the other 

 four. 



