PAPILIONID.E. 



337 



their surface, can be but partially appreciated from what is shown in 

 the accompanying figure. The insect is so dark that it looks at first 

 sight like a very large and fine PajriUo troilus. A closer inspection 

 reveals the true chai'acter of the creature, as the dark Ijands so con- 

 spicuous on the common form can be faintly seen on the under side 

 of the wings of this variety. 



Papilio glaucus. Under side. 



The larva feeds on apple, birch and wild thorn, and is green in 

 color, with two eye-like spots on the thorax. It resembles the larva 

 of PaplUo troilus^ of which a figure is given on page 351. It is a 

 rather difficult creature to find, and its chrysalis, which is usually 

 attached to a twig or branch, is gray and brown in color and looks 

 not unlike a piece of loosened bark. 



Papilio rufnlus very closely resembles Papilio turnus, and takes 

 the place of that species on the western lialf of the continent. The 

 females never assume the dark color of the dimorphic form of 



