350 Professor E. B. PoultoD nn colour -relation 



April IQth. Re-fed. Three larvae unchanged. One brown 

 and 1 blackish-brown larva had changed skin and become 

 blackish-grey with large white patches. 



Ajjril 16th. E,e-fed. The two largest larvaj last described 

 removed to another cylinder, U. The three others un- 

 changed. One of two smaller brown larvie appeared 

 unhealthy. 



Airril 20th. Re-fed. One larva had changed skin and 

 grown much. Of the others, neither of Avhich had changed 

 skin, one was dead and one appeared to be dying. 



AjJril 2Srd. The single healthy larva was brownish-black 

 with white marks. 



Ajyril 27th. The small larva was dead. The appearance 

 of the other unchanged, as also on May 3rd and 11th, when 

 it Avas again re-fed. On May 17th the larva had died. 



L\ 



The two larvai separated from L on April 16th were 

 re-fed and examined on April 21st, 23rd, and 27th, the 

 appearance remaining the same throughout, viz. dark 

 grey "with large white patches. On May 3rd the lai'ger of 

 the two larvffi looked sickly ; on May 5th it was dead and 

 the smaller one seemed unhealthy. The latter died on 

 Mav 7 th. 



M 



A^jril 7th. Re-fed. Five larva^ alive, all greyish-brown. 

 One of two unhealthy-looking larvas had died. 



Airril lOih. Re-fed. Four larvse unchanged ; the fifth 

 had changed skin and had developed larger white patches. 



April 16th. The 2 largest larvas Avere now separated 

 and placed in another cylinder, M\ The remaining 3 

 were brownish-grey, 2 of them with pale patches. The 

 smallest was browner than the others and appeared to be 

 unhealthy. 



April 'list. Re-fed. The last-mentioned larva was dead ; 

 the others unchanged in appearance although one had 

 changed skin durino- the interval. 



April lord. Re-fed. Unchanged. 



April 27th. Re-fed. One larva had become darker, viz. 

 blackish-grey with white patches. The larvse were re-fed 

 and compared on May 3rd, 11th, and 17th, without change 

 in appearance. 



May 22nd. Re-fed. The brownish-grey larva had died, 

 the darker one imchanijed. 



