EASTERN UNITED STATES. 359 



The eggs are .03 of an inch in diameter, marked with 

 fourteen ribs and twenty-five transverse strise. 



The larva at maturity is .8 of an inch long, yellowish 

 green in color, with a bluish-green dorsal line. The legs 

 are tipped with fuscous. On joint 8 is an oblong yellow 

 spot on each side of the dorsal line, a similar mark on 

 joint 2, and a brown spot on the head. 



The chrysalis is cylindrical, conical, not angulated, 

 thorax slightly elevated. Hea'd-case rounded in front, 

 depressed below a line drawn from the anal spine across 

 the base of the wings to the humeral tubercle. Towards 

 the close of this period the eye-cases are purple, the wing- 

 cases whitish, the abdomen green, except at the tip, where 

 it is brown. 



Food-plant Aquilcgia Canadensis. There are two 

 broods in a season, possibly three, the butterflies appear- 

 ing in May and about the last of August or in the fore 

 part of September. 



New York, Middle and Western States. 



183. NISONIADES PERSITJS, Scud. 



Expanse of wings from 1.2 to 1.4 inches. 



Upper surface blackish brown, the outer part of the 

 fore wings sprinkled with pale bluish scales in the males, 

 but in the females a little at the base also. Like the 

 other species, this has a mesial band crossing the discal 

 cell, and a subraarginal band, the first more obscure 

 than the second, except below the median vein and in 

 the cell ; the upper point in the cell containing a dis- 

 tinct hyaline spot in the females, but more obscure in 

 the males. In the outer band spots 1 and 4 and 7 and 

 8 contain each a distinct white hyaline spot, the second 



