Explanation of Plate XXXVIII. 
Portions of cremastral region of pupae of 
(1) G. avis X 200, 
(2) G. rubi x 200. 
These show the greater length and slenderness of the hooks in 
C. avis, despite the maceration that has injured the hairs, which are 
much alike in both species. A fine specimen is seen in the G. rubi 
photograph. 
