]\IEM01ES OF THE NATIONAL ACADE.AtY OF SCIENCES. 
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I, inchtsa^ but the first aud second lines are situated nearer together than in J. indum. The 
subapical browuish-tinged region bordering the upper half of the fourth line is narrower and of 
a deeper reddish brown line than in I. indusa. The submarginal series of linear spots is not so 
distinct as in I, indiisa, while the darlc line crossing the hind wings is paler than in that species. 
lleiieath, the wings are a little darkc]*; the line common to both wings is much more dLstinct 
tlian in I. indiisa, and the costa of the fore wings is margined with reddish. 
Expanse of wings, <5,24: mm.; 32 mm.; length of body, cJ,12uim.; 9,13 mm. 
This variety dilfers in its smaller size and in the covstal portion of the fourth line being 
sinuous, bent outward near the costal edge, then beat inward and again bent outward. 
Geo(/mpJiical distribution. — Thus far only known to myself from the Appalachian province; 
New York City (Elliot); Janeville, 3rd. (3Ius. Comp. Zook). Professor French sends me the 
following localities: Can.ada, Lincoln, Nebr., Colorado. 
Var. French. — The caterpillar of this moth was found feeding on willows in 
southern Illinois through the most of September, resting in an inclosurc' formed of several leaves 
fastened together at the ends of the twigs, but no more than half a dozen occurred in a nest. 
Those put in breeding cages pupated before the middle of October. The moths ai)peared in the 
following April and 3Iay. 
The moth is related to I. indusa Hiibii. and J. oniata G. & E.; more nearly to the latter in 
size aiul coloration, but differs from both in several particulars. Besides size and color, it differs 
from r. indusa in the coloring of its larva. It ditfers from I, ornata in the color of the scales 
spi'iukled over the fore wings, the color of the spots outside the fourth line, and the continuation 
of that line, as it is seen here iiartially obsolete oi>posite the disk, as well as in some other i^oints. 
The apices are no more x^roduced than in /. invlusa^ nor is the costa more bent (French). We 
would add that, judging from two sxieciniens received from Professor French, we are inclined to 
think that this is a variety of I. indusa Iliibiier. 
Larva. — Length, 1.25 inches when crawling; hndy nearly cylindrical; two hlack tubercles, close together, on 
the top of third and eleventh segments. On the hack are four bright but narrow yellow lines alternating with 
narrow black ones. The stigiiiatal lino is black ; above this, on the subdorsal space, an irregular alternation of black 
and white. Pelow the stigmata a narrow yellow line; below this, on the substigmatal sx)ace, the body is dosh 
colored. Head shining black. A few gray liaira acattere<l over the body. (French.) 
Thv moth. — Leugtii of body, 0.5d inch; expanse of wings, 1.10 inches. General color of body and fore wings, jiale 
gray, the latter rather sparsely sprinkled with dark brown scales. Palpi brown above, scarcely projecting beyond 
the head, third Joint concealed by the hairs of the others. Front slightly brownish, a tuft of pule gray scales at the 
base of each antenna, the usual deep brown mark from the anteiime to the top of the thoracic crest. Fore wings 
with the usual transverse lines almost white. The basal lino makes a bend outward on the median vein; from this 
it goes in a straight course to the siibmediau vein; from this to the x><>J^tcrior or inner margin it curves a little 
outward. A second lino extends from the costa about one-fourth of the distance from the base obli<[uely to the 
posterior margin, near the posterior angle. Atliird line passes straight across the wing from the [josterior margin to 
the second, a little fjelow 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 joins the second on the posterior margin, making the usual “ V'^ as in the 
allied species. The fourth line is slightly S-shaped in its costal third. Outside the fourth lino is a subtenninal, 
somewhat zigzag row of Idack 8i)ots, some of Avhicli are often faint or obsolete. In ilio diseal cell tliere is usually a 
faint obliipie lino that .seems to be a conliiiuation of the third line, though it does not reach the costa, and the end 
of the cell sometimes appears like a short lino. There are throe ohli(juo shades of brownish olive, more or less 
distinct, that cross the wing parallel to the second lino; the lirat. beginning on the costa inside the basal line, faintly 
borders that line to the subinedian v’^ein, and is seen below that vein on the third line; the second, outside the second 
line through its whole course, is ilarkest next the line; the third from holh sides of the foiirtli line to the middle of 
the outer border faint, exce])t along the lino. .Just out.side tins S-i»art of the fourth linn are three grayish ycdlow 
spots with a few reddish brown scales. IHud wings pale smoky gray with a faint whitisli line from the fourth of 
the fore wings to the anal angle. Ihnieath, the fore wings aro'ahont the color of the hind wings above, pale along 
the costa and terminally ; the hind wings are paler, with a dark transverse lino. (French, Can. Ent.,xiv. 33.) 
Iditkijura jocosa W.YaXw. (Pi. Ill, tig. 22). One 9 type; Liulian River, Florida. This is, as I 
have satisfied myself by an examination of the type in the American iruseum of Natural History, 
New York, only a small ditlering from the normal form of tlie siiecies in the inner arm 
of the V being lirmer and less sinuous, being interruxtted at the union with it of the short middle 
line which ends on the hind edge of the wing, while in indusa the line is not usually interrupted, 
although two of the indusa in 3Ir. Edwards’s collection do have the line iuterruxited avS in his 
