302 LEPIDOPTERA. 



slender, and is sometimes entirely wanting. I have raised 

 the Progne and Comma butterflies from caterpillars which 

 were so much alike, that I am not certain to which of them 

 the following description belongs. These caterpillars were 

 found on the American elm in August ; they were pale 

 yellow, with a reddish-colored head, white branching spines 

 tipped with black, and a row of four rusty spots on each side 

 of the body. They were suspended on the 21st and 22d 

 of August, changed to chrysalids within twenty-four hours, 

 and were transformed to butterflies sixteen days afterwards. 

 At another time, a Progne butterfly was obtained from a 

 caterpillar, which I neglected to describe, on the 18th of 

 August, the chrysalis state having continued only eleven 

 days. The chrysalis is brownish gray, with silvery spots on 

 the back, a short, thick, and rounded nose-like prominence 

 on the thorax, and two conical double-pointed horns or 

 ears on the head, the outer points very short, and the inner 

 ones longer and curving inwards. 



Vanessa Mlberti* Godart. Milbert's Butterfly. (Fig. 125.) 



Black above, with a broad orange-red band near the 



hinder margin of all the 

 wings, behind which on 

 the hind wings is a row 

 of pale blue crescents ; 

 fore win os with a small 



o 



white spot near the tips, 

 and two orange-red spots 

 near the middle of the 

 front edge ; under side 

 deep brown, with a pale band near the extremity of the 

 wings, and no metallic characters on the hinder pair. 

 Expands from 2| to 2| inches. 

 This showy butterfly is rare in the vicinity of Boston, but 



* This is the Vanessa furcillata of Mr. Say; but Godart's name has the priority 

 in point of time. 



