EASTERN UNITED STATES. 99 



wings contains a series of more or less prominent inter- 

 venular blue clouds, sometimes small and not reaching the 

 costal end of the border, at other times suffusing most of 

 the black, and it may be some of the yellow. Tail .5 of 

 an inch long, black, edged on the inside with yellow. 



Under side similar to the upper, but the black termi- 

 nal borders suffused with yellow, and the lunules washed 

 with orange, there being a little of this on the posterior 

 part of the yellow ground color. 



Body black, with a broad yellow stripe on each side. 



Sometimes the ground color instead of being pale 

 yellow is more or less tinged with dark yellow border- 

 ing on orange, and this may be sufiused with black. 

 These are transition stages between the typical form and 

 the black female. 



Aberr. form 9 Glaucus, Linn. — This is black in- 

 stead of yellow. In this case the spots and lunules of the 

 outer border remain the same, but the blue clouds of 

 the hind wings extend in a crescent band from the costa 

 to the internal margin, preceded by a wavy black line, 

 and more or less of the wing inside this line washed 

 with blue. The black ground color is usually dull, so 

 that the transverse black bands can be traced, at least on 

 the under side. 



The eggs are nearly globular, smooth ; dark green when 

 first laid, but soon change to greenish yellow, speckled 

 with reddish brown. 



The young larva is of a brownish color mottled with 

 black, and has a large whitish spot on the middle of the 

 back. On each side of the dorsum on the second and 

 last three segments a tubercle, and two on each side of 

 third and fourth. Duration of this period four days. 



