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449 
jninent, rounded, tinged with golden-yellow, with an elevated line on each 
side at its base, extending obliquely forward and outward upon the thorax. 
The abdomen is purplish-black, very smooth and polished, shorter than the 
thorax, short cylindrical with rounded ends, depressed above and in the dried 
specimen deeply excavated and boat-like. Near its base is a pale yellow band 
occupying the apex of the basal segment above and beneath, and nearly or quite 
interrupted upon each side. The legs are yellowish-white, including the ante¬ 
rior haunches, the tips of the feet being black. The shanks are without con¬ 
spicuous spines at their tips, and the feet are composed of four cylindrical, 
nearly equal joints, each joint having a coarse bristle at its tip on the upper 
side. The wings are clear and glassy, with numerous minute punctures except 
upon the basal part, each puncture yielding a fine bristle. A broad glabrous 
stripe extends along the inner margin of the fore wings, in which is a single 
row of equidistant punctures and bristles. The fore wings are destitute of 
veins,’except a robust one of a pale color near the outer margin, which unites 
with the margin through about one-fourth of the length of the wing, separatin g 
from it again towards the tip, where it ends in a short branch or stigma which 
is slightly thickened and notched at its apex. 
Another parasitic insect, so much like the preceding in all its 
details that it might be regarded as its brother reared at the 
same table, I met with upon rose leaves in September last, where 
it was very probably searching for these same caterpillars in 
which to deposit its eggs. In the Country Gentleman this was 
named 
.The Brother p.uiasite, (Trichogrammal fraterna.) It is 0.10 in length 
and its wings when extended are 0.15 across. The thorax is much less rough 
than in the foregoing species, being very minutely shagreened and the abdomen 
is of the same brilliant brassy-green color as the thorax, without any pale spot 
or band towards its base, its under side being black. The sub-marginal vein 
of tho fore-wings is also black, and is united with the margin two-thirds of its 
length, with the stigmal branch quite short and more conspicuously notched 
at its end. In all other respects the description given of the preceding species 
applies to this also. 
By these parasites, and probably other means of which we 
are yet in ignorance, the vaporer moths of our country are crip¬ 
pled and restrained from becoming so numerous as they other¬ 
wise would be. In the vicinity of my residence I have never 
known them to be sufficiently multiplied to merit any attention 
on account of the depredations they commit. I should judge I 
had never met with a half dozen of the caterpillars in any one 
year, until last summer (1855), when they were noticed as being 
unusually common. This is probably near the northern extreme 
of their geographical range. In districts farther south and east, 
where the climate is warmer, they are much more numerous and 
