EASTERN UNITED STATES. 141 



FAMILY NYMPHALIMi. 



These may be known by their ample wings, slender 

 antennae, the knob slender or not, and by having in both 

 sexes, with the exception of the genus Libythea, only 

 four feet adapted for walking. The front pair of legs 

 are present, but have no developed tarsi, being mere 

 lappets placed against the prothorax ; the second pair 

 are directed forward, and the third or hind pair back- 

 ward. The larvae are more or less hairy, or covered 

 with more or less branching spines ; the head is more or 

 less bilobed, the apex of these lobes often supporting 

 branching spines. The chrysalides are naked, often very 

 irregular in shape, and attached to a button of silk by 

 the hooks of the cremaster alone. The family is repre- 

 sented in the United States by five subfamilies, — Helico- 

 ninae, Danainae, Nymphalinae, Satyrinae, and Libytheinae 



SUBFAMILY HELICONINJE. 



In this the wings are long, rather narrow, with a 

 slender body and antennae. It is represented by but 

 one species, Heliconia Charitonia, where the characters 

 of imago, larva, and chrysalis may be found. 



32. Heliconia Charitonia, Linn. 



Expanse of wings from 2.5 to 4 inches. 



Wings long and narrow. Upper surface black, banded 

 with lemon-yellow, as in Fig. 35 ; three of these on the 

 fore wings and two on the hind wings. The outer one 

 on the fore wings is obliquely transverse before the apex, 

 the second nearly parallel just outside the cell, the third 



