204 
CATOCALA NEOGAM A. 
The strong resemblance which many of the yel- 
low under-wings, as these moths are called, have to 
each other, has rendered their synonomy somewhat 
complex and confused. The species just decribcd 
has been thought not to be specifically distinct from 
the Linnean Ph. paranympka (figured by Roesel, 
iv. pi. 18, figs. 1, 2), but it is of much larger size, 
the wings are more evidently dentated, the outer- 
most black bar on the under wings is uninterrupted, 
and the inner one is not recurved anteriorly and 
continued along a portion of the abdominal margin. 
It is likewise nearly related to Catocala affinis 
(West. Drury , vol. i. pi. 23, fig. 6), which is a 
native of New York, but is at once distinguished 
from that species by its yellow abdomen, and having 
a yellow space along the margin exterior to the 
black band on the under wings. 
