PLATE I 



EXPLANATION OF FIGUKES 



Pieris 



1 Adipose cells from 1st stage larva. X 150. 



2 Do., showing glycogen (iodine preparation). X 150. 



3 Do., showing fat (osmic acid preparation). X 150. 



4 A mitotic figure in an adipose cell from 1st stage larva. X 300. 



5 Adiopse cells from 2nd stage larva. X 150. 



6 A binucleate cell f/om 2nd stage larva, showing reticulated appearance 

 of cytoplasm. X 300. 



7 Adipose cells from 2nd stage larva, showing fat (freezing method prcpaia- 

 tion). X 150. 



8 Adipose cells with ramified nuclei. X 150. 



9 Adipose cells from 4th stage larva, showing fat (osmic acid preparation). 

 X 150. 



10 Same showing glycogen. X 150. 



514 



