382 [April 23, 
Mann.] 
In the following descriptions I have drawn as much as possible 
from Harris’ Treatise on Some of the Insects Injurious to Vegeta- 
tion, and have indicated by italics the portions so adopted. 
First, I give the characters which, as far as I know at present, are 
common to both species. 
The antenne of the male have a very narrow and almost downy edg- 
ing, on each side, hardly to be seen with the naked eye. The feelers are 
minute and do not extend beyond the mouth. The tungue is not visible. 
The wings are large, very thin, and silky; and, when the insect is at 
rest, the fore wings are turned back, entirely cover the hind wings, and 
overlap on their inner edges. The female is wingless, and its antenne 
are short, being about half the length of the body, filiform, and slen- 
der. Its body approaches to an oval form, Harris adds, but tapers 
and is turned up behind. Iam not able to say whether this character 
is common to both species or not. 
I find the following differences between the species: — 
Anisopteryx vernata. 
The first seven rings of the abdo- 
men of both sexes with no spines 
upon the back. 
Fore wings of male ash-colored, with 
a distinct whitish spot on the front edge, 
near the tip; 
[ fore wings] crossed by two jagged, 
whitish bands; the outermost band has 
an angle near the front edge. The 
white bands are often entirely wanting, 
in which case only the whitish spot near 
the tip remains. 
Along the sides of the whitish bands 
there are several blackish dots, each on 
a nervure, and all generally con- 
nected together by a dusky band 
which includes them, and runs on 
that side of each whitish band which 
is towards the other. These bands 
remain visible when the whitish bands 
are wanting. 
Anisopteryx pometaria. 
The first seven rings of the abdo- 
men of both sexes bear each upon 
the back two transverse rows of stiff 
red spines pointing towards the end 
of the body. 
Fore wings of male ash-colored or 
brownish-gray ; 5 
the whitish spot found on the fore 
wings of A. vernata is wanting. 
The whitish bands found on the 
fore wings of A. vernata are wanting, 
but there is a jagged, submarginal 
white band on the upper side of the 
fore wings in most specimens. 
There are three interrupted, dusky 
lines across the fore wings, instead of 
two lines, as in A. vernata. Some- 
times these lines are only indicated 
by dark spots on the front edge of the 
wing, and by blackish dashes at the 
crossing of median nervure; rarely 
are they very distinct throughout 
their whole extent. 
