THE PIERIDS 



but on the fore wings suggests a head of a dog or of a duck, 

 a prominent black spot on the medial vein serving as the eye. 



Caterpillar. — Length about three-fourths inch; its color 

 is light or dark yellowish green; usually there are cross stripes 

 of black or yellow, and each segment bears a cross row of 

 papillae, usually black. 



Food-plants. — Lead-plant or false indigo and clover. 



It is certainly a new species of dog that is de- 

 lineated in yellow against black on the wings of 

 this butterfly. It looks far more like a duck with 

 bill opened in the act of quacking than it does 

 like a dog. However, it is a very alert-looking 

 creature whether it be bird or beast. A large 

 black eye adds much to its vivacious expression 

 of countenance. 



The dog's-head is abundant in the southwest- 

 ern United States and extends to the Pacific and 

 into Central America. It is sometimes found as 

 far north as Pennsylvania, Kansas, and Wisconsin. 

 In its northern range it is three-brooded, and 

 winters as a chrysalis. It loves to settle on the 

 red-purple blossoms of the thistle, clover, and 

 the milkweed; and as if in sympathy with the 

 color of these flowers, the females of the late 

 broods have the veins of the hind wings outlined 

 in reddish purple. It is said that this butterfly is 

 fond of the open pine woods, and has habits 



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