Plate XII. 

 (To be bound facing Plate XII.) 



Callophrys rubi. 



Portion of cremastral area of pupa x 100. 



Shows both sides of fracture (due to forcing pupal-skin to flat surface for 

 purpose of photographing). The plate illustrates three points :— 



1. The well-developed anchor-hooks of pattern usual on cremaster of "hair- 

 streak " pupa?, apparently of functional capacity, but not known to be used. 



2. That the anchor-hooks are developments from the points that exist at the 

 crossing of the skin reticulations, and therefore have no direct relationship with 

 ordinary hairs. 



3. The occurrence, among the cremastral anchor-hooks, of ordinary hairs, 

 much longer than the hooks, and unattached to the reticular ribs, suggesting that 

 the hooks are not used for purposes of attachment, as the hairs would probably 

 much embarrass, if not prevent, their proper function, if its exercise were desired. — 

 T. A. Chapman. 



