Report of Entomologist. 
381 
from the rib vein, and after extending the same distance that its root is from the 
base of the wing it forks, giving off its first branch. This branch, after running a 
similar distance, divides into two forks, which extend straight onward without any 
further division to the end of the wing, terminating in the middle of its rounded tip. 
The main vein extends twice as for before it again divides and sends off its second 
branch, and at or quite near the same point it makes its first connection with the 
rib vein, sending a veinlet obliquely backward to it; and this second branch, near its 
commencement, is connected by a transverse veinlet with the outer fork of the first 
branch. The main vein, after again extending a similar distance, which is a third or 
more of its remaining length, gives off its third branch. 
Mr. Westwood figures the wings of the left side only, and this externo-medial vein 
he repsesents as having four branches in the fore wings and three in the hind ones. 
But both pairs of wings are liable to vary in the number of these branches. In the 
male specimen before me this vein has only three branches in each of the wings; in 
the female specimen the fore wing of the left side and the hind wing of the right 
side have four branches to this vein. 
The interno-medial vein , like its fellow, forks three times at equal distances apart, 
sending out branches from its inner side, which ramify the inner half of the wing. 
The first branch is given off forward of the corresponding branch of the externo- 
medial, with which it is connected a short distance from its origin by a transverse 
veinlet which issues from that branch at half the distance from its base to its fork. 
This branch continues single two-thirds of its length. It then divides, and its two 
forks attain the end of the wing next to those of the first branch of the externo-medial. 
The main vein sends off its second and third branches before it has extended half its 
length. It reaches the inner margin at about three-fourths the distance from the base 
to the apex of the fore wings and two-thirds of this distance in tl\p hind ones. Like 
the outer vein, this also sometimes gives off a fourth branch near its termination. 
Occupying the long narrow space between the interno-medial vein and the inner 
margin of the wing are two veins, answering to what are termed the anal and 
axillary veins. The first of these corresponds somewhat with the rib-vein, it being, 
particularly in the'hind wings, more thick and darker colored than the other veins 
in this part of the wing, becoming slender and colorless, however, toward its tip; 
and the interno-medial vein also connects with it by an oblique veinlet at or near the 
base of its second branch, and by other veinlets beyond this. The second, or axillary 
vein is slender, colorless, and scarcely half the length of the preceding. Near its 
base are two short branches, passing from it obliquely to the margin, and these arc 
connected together by a veinlet which runs from near the end of the first to the base 
of the second branch. 
In the fore wings upon the inner margin, near the base, and at the end of the first 
or shortest of the two branch veins last mentioned, is a singular appendage, a little 
semi-circular lobe projecting from the margin, like an excrescence growing upon the 
side of the marginal vein, the vein being straight and not at all indented by it. This 
appendage is concave on its upper and convex on its lower side, and is feebly trans¬ 
lucent except on its thickened edge. It is black in the male, and pale testaceous in 
the female specimen before me. 
The veinlets in the wings are more slender than the veins, whitish, gradually 
becoming more numerous toward the tips of the wings. There are six or seven 
veinlets between each of the long parallel veins, and one or two less between the 
veins ending in the inner margin. They are arranged more or less regularly in five 
or six rows, crossing the wing in an oblique, or partly in a transverse direction. 
