few species with a similar spot on the fore wings. The apex of 

 the fore wing is somewhat truncated and the lower two thirds 

 is slightly excavated. Hind wings somewhat elongated pos- 

 teriorly at the anal angle. Outer margins more or less crenu- 

 late. Eggs nearly globular, broad on top, ornamented with 

 eighteen to . twenty broad, but low, vertical ribs, between 

 which are delicate crosslines; laid in clusters. Head of cater- 

 pillar squarish, crowned by two diverging spines on which are 

 many little spinules. Back of the head there is a frill of spines. 

 Body thickest at the middle, tapering fore and aft. Hind pair 

 of pro-legs long and diverging. They feed upon hackberry 

 trees (Cdtis). The chrysalis has a very remarkable arrange- 

 ment of the cremaster, which is disk-like, studded with hooks; 

 the- whole so arranged that the pupa, when suspended, hangs 

 with the ventral or belly side parallel to the supporting surface. 



There are numerous species in the genus, many of them trop- 

 ical and very brilliant, only two commonly occur in the north- 

 ern portions of our territory, the others found within our limits 

 being inhabitants of the Southern States. 



(1) Chlorippe celtis Boisduval & Leconte, Plate XLIX, Fig. 

 1, c? (The Hackberry Butterfly). 



Under side grayish purple, with the spots and markings of 



115 



PL. XLIX 



