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 
cars on the head, the outer points very short, and the inner 
ones longer and curving inwards. 
o o 
Vanessa Milberti 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 wings with a small 
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' g 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. 
