402 
LEPIDOPTERA. 
without previously making a cocoon. Unfortunately my 
caterpillars died before the time for their transformation 
arrived. The chrysalis is short and thick; obtuse behind, 
but terminated by two minute points; and the transverse 
notched ridges or little teeth that are found on the chrysa¬ 
lids of the other insects belonging to the same family, are 
very small and hardly visible on this one. The insect re¬ 
mains in the ground through the winter, and the moth comes 
out in the following summer, during the month of June, 
if I am rightly informed. I have not been able to obtain 
one myself, and my description of the moth was made from 
a very fine specimen belonging to a friend, who received it 
from New Bedford. 
Between the regal Ceratocampa and the smaller insects of 
this family belonging to the new genus Dryocampa should be 
placed a noble moth, which partakes, in some respects, of 
the characters of both; its horned caterpillar, particularly 
while young, when its horns are proportionally longer and 
more formidable in appearance than afterwards, resembles 
somewhat that of the Ceratocampa ; its chrysalis is exactly 
like that of a Dryocampa^ and like the latter also, in the 
winged state, its feelers are minute, its hind wings project 
beyond the front edges of the fore wings wlien at rest, and 
its style of coloring is the same. In my Catalogue of the 
Insects of Massachusetts, I placed this moth, the imperia¬ 
ls of Drury, in the genus Ceratocampa^ from which, how¬ 
ever, it must be removed, on account of its very small 
feelers, and the position of its wings ; and I now refer it, 
with some hesitation, to the genus Dryocampa^ with which 
it agrees so well in the moth state, although its caterpillar 
differs a good deal from those of the other insects of the 
same genus. The imperial moth, Dryocampa imperials 
(Fig. 196), has wings of a fine yellow color, thickly sprin¬ 
kled with purple-brown dots, with a large patch at the base, 
a small round spot near the middle, and a wavy band to¬ 
wards the hinder margin of each wing, of a light purple- 
