The Moths and Butterflies 453 
comma-spot. The comma-butterfly, Polygonia comma (PI. XI, Fig. 6 ; 
also Fig. 642), is a familiar eastern representative of the angle-wings. On the 
under side of each hind wing is a small but distinct silver comma or C spot. 
Fig. 642.—-The comma-butterfly, Polygonia comma; two butterflies, a caterpillar, and 
empty chrysalid on gooseberry branch. (After Lugger; natural size.) 
The spiny greenish-brown larvae feed on hops, nettles, and elms. The pale 
wood-brown chrysalids with metallic golden or silver spots are commonly 
