396 



PROCEEDINGS OF THE NATIONAL MUSEUM 



This is unwise since the position and degree of cui'ving of the head 

 sclerites depends to some extent on the position assumed during 

 mounting. However, it has been found a satisfactory method for 

 taxonomic purposes to record the heads from preparations of cast 

 skins and fresh larvae flattened in a standard way. By this method 

 all the head parts can be shown in the one diagram. 



The size and appearance of the cocoons have not been used in this 

 classification since precise descriptions, either verbally or b}^ drawings, 

 were found very difficult. The color patterns of cocoons should be 

 useful in future taxonomic work within some genera. 



pOC pos 



Figure 1.- — Xorides sp.: a, anterior view of head; b, lateral view of head; c, lateral view of 

 mandible; d, spiracle. Explanation of symbols on facing page. Detailed explanation 

 on pages 394, 395. 



