562 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
The arrangement of warts and tufts is like all the other species, of which this 
seems to be the most delicate and the larva the plain est in color, having no other 
color than the greenish-yellow ground color, the sulphur-yellow vestiture and black 
dorsal baud and brushes. 
The moth.— Male. Differs from 0. hucostigma by the more rounded, less angular 
subcostal bend of the extradiscaJ line; while the same line towards the inner edge 
of the wing is more augular. The two blackish costal slashes are much longer in 
definite and these are succeeded by two or three long slashes pointed inwards, and 
these by a series of pointed dots in the median interspaces. The submarginal white 
sinuous aud wavy line, sometimes so distinct in leucostigma, is obscure iu definita, but 
the white lunule is equally distinct in both species. In other respects the two-species 
are much alike, and are of the same size. Expanse of wings 30 to 31 mm . 
12. Ichth y ura palla French. 
Tbe caterpillars of this moth were found feeding on willows in south- 
ern Illinois through the most of September, resting in an inclosure 
formed of several leaves fastened together at the ends of the twigs, 
but no more than half a dozen occurred iu a nest. Those put in breed- 
ing cages pupated before the middle of October; the moths appeared 
in the following April aud May. 
The moth is related to I. inclusa Hu'bn. and I. ornata G. and R. ; more 
nearly to the latter in size and coloration, but differs from both in 
several particulars. Besides size and color, it differs from I. inclusa in 
the coloring of its larva. It differs from I. ornata in the color of the 
scales sprinkled over the forewings, the color of the spots outside the 
fourth line, and the continuation of that line, as it is set here partially 
obsolete opposite the disc, as well as in some other poiuts. The apices 
are no more produced than in i. inclusa, nor is the costa more bent 
(French). We would add that judging from two specimens received 
from Professor French we are inclined to think that this is a variety of 
1. inclusa Hiibner. 
Larva. — Leugth 1.25 inches when crawling; body nearly cylindrical, two black 
tubercles, close together, on the top of third and eleventh segments. Ou the back are 
four bright but narrow yellow liues alternating with narrow black ones. Thestigmatal 
line is black; above this, or the subdorsal space, an irregular alternation of black 
and white. Below the stigmata a narrow yellow line ; below this, or the substig- 
matal space, the body is flesh-colored. Head shining black. A few gray hairs scat- 
tered over the body. (French.) 
The moth.— Length of body .56; expanse of wings 1.10 inches. General color of 
body aud forewings pale gray, the latter rather sparsely sprinkled with dark brown 
scales. Palpi brown above, scarcely projecting beyond the head, third joint con- 
cealed by the hairs of the others. Front slightly brownish, a tuft of pale gray scales 
at the base of each auteuua, the usual deep brown mark from the antenna? to the top 
of the thoracic crest. Forewings with the usual transverse lines almost white. The 
basal line makes a bend outward ou the median veiu ; from this it goes in a straight 
course to the submedian vein ; from this to the posterior or inner margin it curves a 
little outward. A second line extends from the costa about one-fourth of the distance 
from the base obliquely to the posterior margin, near the posterior angle. A third 
line passes straight across the wing from the posterior margiu to the second, a little 
below the median vein. The fourth begins as a white spot on the costa a little more 
than two-thirds of the distance from the base, and joius the second on the posterior 
