272 
LEPIDOP TERA. 
Twice a year our pastures and road-sides are enlivened 
great numbers of the small yellow Pliilodice butterfly 
( Colias Pliilodice of Go- 
dart). (Fig. 100, male; 
Fig. 101, female.) They 
begin to appear towards 
tbe end of April, are 
common throughout the 
month of May, after which 
no more are seen till near, 
the end of July, when a 
new brood begins to come 
forth, and some of them 
continue till late in the 
autumn. Their wings are 
yellow, with a black hind 
border, which in the fe- 
males is quite broad on 
the fore wings, and spotted with yellow ; the fringes of the 
wings, the antennae, and the shanks are red ; the fore wings 
have a small narrow black spot on both sides near the mid- 
dle ; the hind wings have a round orange-colored spot in 
the middle of the upper side, which on the under side is 
replaced by a large and a small silvery spot close together, 
and surrounded by a rust-colored ring. 
The males are generally smaller than the females. The 
caterpillars live upon clover, medicago, and lucerne, and I 
have occasionally found them on pea-vines. They are green, 
slightly downy, paler or yellowish at the sides, and grow to 
the length of about one inch and a half. They suspend 
themselves to the stems of plants by the tail and a trans- 
verse loop, in the same way as the preceding species. The 
chrysalis (Fig. 102) is straw-colored, not angulated at the 
sides, with a slight prominence over the thorax, and the 
anterior extremity ends in a short and blunt point. H> c 
genus Colias , to which the Pliilodice butterfly belongs, is 
Fig. 100. 
