Plate IX. 





Photo. F. N. Clark, 



Portion of 6th, 7th and 8th abdominal segments of larva of Everks 

 argiades, just above spiracles of right side (last instar) ; showing 

 spiracular lenticles of 6'1'h abdominal segment (in corner.) x 150. 



A Natural History of the British Butter/lies, etc., 1909. 



To face p. 83.] 



