134 THE BUTTERFLIES OF THE 



wings black, all the rest brown with pink-brown scales ; 

 a roseate spot at the base of hind wings. 



A female form occurs with the wings nearly or quite 

 white, and also a black form. The winter forms, or 

 those from hibernating chrysalides, are usually somewhat 

 smaller than the summer forms. 



The eggs are pale yellow when first deposited, but 

 change in a few hours to a dark crimson. They are 

 spindle-shaped, attached by one end, ribbed longitudi- 

 nally, and crossed by numerous strise. These are de- 

 posited on the leaves of clover, Medicago (lucern), buf- 

 falo-pea, and some other allied plants. From these a 

 brownish-green larva hatches in six or seven days which 

 is .06 of an inch long, cylindrical, of uniform size from 

 segment 2 to segment 11, then tapering to the last. Color 

 brownish green, each segment creased by four or five 

 transverse creases ; each ridge with several black dots 

 on each side, each dot supporting a short whitish clubbed 

 process. Head obovate, dark brown. At first the larva 

 eats little holes in the leaves, but as it grows older it 

 eats the whole leaf from the outside. 



After the first moult it is .12 of an inch long; shaped 

 and creased as before ; the whole upper surface covered 

 with minute whitish tubercles which are black at their 

 summits, these tubercles forming longitudinal and trans- 

 verse rows on the ridges. Color dull green ; head black. 



After the second moult the length is .3 of an inch. 

 Color blue-green, showing a faint whitish lateral stripe ; 

 head pale green ; tuberculated as before. 



After the third moult the length is .7 of an inch ; the 

 principal changes are : lateral stripe white and distinct, 

 with usually a red or orange discoloration on the anterior 



