Explanation of Plate XLT. 
Pupa 6f G. avis. 
Fig. 1. Portion of mesothorax x 30. Spiracle cover in front, 
dorsum on the right, forewing on the left, of picture. The change 
of skin sculpture from the body to the wing is very distinct, the 
former having hairs, lenticles and rosettes, the latter only network. 
It is noteworthy that the .spiracle cover belongs to the wing area. 
Fig. 2. A portion of wing x 50 to show sculpture. 
