150 THE BUTTERFLIES OF THE 



Each segment is furnished with six long, tapering black 

 spines, blunt at the top, from each of which springs a 

 bristle. Feet and legs black ; head ovoid, deeply cleft, 

 with high conical vertices, on each of which stands a 

 stout, spinous, recurved process. 



The chrysalis is a little more than an inch long, 

 slender, the thorax much compressed, the wing-cases 

 very prominent, forming a narrow carinated hunch, 

 which rounds abruptly on posterior end. Colors varia- 

 ble, some specimens buff with greenish markings, or on 

 the abdomen greenish brown ; some black, the wing- 

 cases and anterior parts mottled in light and dark black ; 

 some with the anterior parts pink-tinted mottled with 

 greenish black. 



The larva of this beautiful insect feeds on the passion- 

 flower. It is found in the Southern States; Arizona, 

 California, and occasionally as far north as Coalburgh, 

 West Virginia ; Cape May, New Jersey ; Philadelphia, 

 Pennsylvania. 



37. Argynnis Idalia, Drury. 



Expanse of wings from 2.75 to 3.6 inches. 



Male. — Upper surface of fore wings fulvous, black 

 along the costa, with a black outer border which is a little 

 wider than the costal border; base and hind margin 

 brown. In the cell are three black bars, at the end an- 

 other bar with an open 8 united to it enclosing a fulvous 

 spot. Beyond the cell runs a transverse zigzag line, a 

 submarginal row of black dots, and next the border a 

 row of black crescents. On the costa, instead of a sub- 

 terminal spot there is a black patch, with another between 

 this and the zigzag line. 



