134 ENTOMOLOGICAL NEWS. [September, 



The color of the underside of the wings of the male is much 

 deeper in Autumn than in early Summer, being a light orange, 

 and on the upperside of the primaries the fresh males of October 

 have the black outside border well covered with a beautiful dust- 

 ing of red scales. In examples of August males but a few scat- 

 tered (red) scales are to beT>bserved, while a careful examination 

 of many specimens taken in early Summer failed to show to 

 the writer a trace of this Autumn feature. However, hand- 

 bred specimens might show it, but as I have reared only late 

 Summer larvae, I cannot settle the question. Near the base of 

 the front margin of the hind wing in the male is a large, oblong, 

 orange-colored spot of a mealy appearance. I have noticed the 

 same on the male of Colias eurydice. 



One female, taken in August several years ago, has the ground 

 color of the upperside of the front wings white, an approach to 

 the albino, while on the upperside of the hind wings of man}- of 

 the October specimens, the dark streaks and shades from the 

 black border reach almost to the base of the wings. 



I made the discovery of the food-plant of ccesonia a number 

 of years ago by watching a female flitting about some bushes. 

 The eggs of this butterfly are laid on the underside of the ten- 

 der end leaflets of Amorpha fruticosa or "lead plant." They 

 are spindle-shaped, white or pale yellow, growing darker before 

 hatching. The young larva is yellowish green, swollen slightly 

 at the head and thoracic rings and tapering to the anal extremity. 

 After the last molt many of the larvae become cross striped, while 

 others are almost unadorned. Of the two kinds of grown larvae, 

 the one I shall designate No. i is dark green, with a lateral yellow 

 or white line along the spiracles. An orange band almost entirely 

 covers the pale yellow line, being broadest and most distinct in 

 the middle of each segment. A bluish tinge above and below the 

 stripe is usually noticeable. 



The underside of the body is paler than above. On rings 3 

 and 4 is a black dot, each, just abpve the stripe. Head green, 

 and covered with short hair. Feet green; whole body covered 

 thickly with small, raised black points. Each ring many wrinkled. 

 Length of mature larva i^ to 1^2 inches. 



The larva No. 2 differs from No. i in the cross-bands of black 

 and bright yellow on each segment, reaching the yellow longitu- 

 dinal line below, and giving the larva a handsome striped appear- 



