MEMOIRS OF THE FTATIONAL ACADEMY OF SCIENCES. 
131 
Larva. 
Packard, Fifth Kep. U. S. Ent. Comm. Ins. inj. Forest Trees, p. 453, 1890. 
^Foth . — One male. Smaller ami duller brown than I. aptcaUs^ with a slig'lit lilac tint on the 
bead, thorax, and fore wings. Palpi whitish below, dark brown above, as in /. apicalis; front of 
head slightly broader and srpiarer; median thoracic brown band as in I. (fptealis. Fore wings 
with tlie costal edge straighter and the apex less turneil n\^ than in /, apicalis^ the apex being 
slightly moni rounded than in that siiecies or in I, indusa. Basal line distinct, making a sharp 
angle on the cubital vein, and more incurved in tlie subcubital S])ace than in I. apicalis; second 
line much more suddeidy incurved than in /, apicalis^ the same line being straight in J. indiisa; 
the short third line as in I. apicalis, but more sinuous. Fourth and outer line much as in J, 
apicalis, but the species dihers from all the others known by the large consiiiciious irregular 
whitish ocherous patch which fills in the costal curve of this line and extends halfway from the 
costal end of the line to the apex of the wing; no deep brick-red discoloration on eacli side of 
costal half of fourth line, so distinct in T, apicalis^ but a long distal blackish stripe extends along 
the first cubital venule to the subinarginal row of brown dots, which are not so distinct as in J. 
apicalis or /. inclusa, though the marginal row of dark brown luimles is as distinct as in 7. inclusa. 
Fringe as in 7. indusa, but that on the hind wings much darker, Ilind wings darker than in 
7, apicalis. Wings beneath much as in 7, apicalis, but there is no reddish tint toward the apex? 
and the white oblique costal streak is much less distinct. There arc traces of a common brown 
dilfnse line. Abdomen a little shorter, the fan or tuft of scales iierhaps shorter and expanding 
wdder. 
Expanse of wings, 25 mm.; length of body, 12 mm. 
This species differs from 7. inclusa and apicalis in the transverse lines on the fore wings being 
very much more sinuous, and it need not be confounded witli any of our other species. The wliite 
costal mark is oblique and curved much as iu apicalis, 
Larm before the last molt , — Head broader tlwui the body, datteued iu front, dull black, vuth 
long white liairs. Body tiattened, with yellow and reddish longitudinal stripes; three dorsal faint 
red stripes on a yellowish ground, and three deep lake-red lateral stripes, the lowermost the 
broadest and deepest in hue. Two bright yellow lateral stripes. Five pairs of tlesh-colored 
abdominal legs, which are pale amber, colored like the underside of the body. Length, 9 mm. 
Larva after the last molt , — Markings much as iu the xJrevious stage. Length, 17 to 18 mm. 
Cocoon , — The rude cocoon is formed by tying a few leaves together, gathering them by a web 
at the edges, thus forming a roomy chamber, partly lined with silk, within which the chrysalis 
rests. 
Pupa . — Smaller and not so lull and rounded at the end as iu I. indiisa) cremaster as in that 
species, ending in two stout, very short, recurved spines. Length, 12 mm. 
Habits, — Th6 caterpillar of this interesting species was found July 30, at Brumswick, Me., 
feeding on the aspen [Populns tremuloides). It molted August 10, and about the 20t!i began to 
spin a silken cocoon between two leaves. The moth (a male) appeared in the breeding cage at 
Providence, ISlay 20. Like I. mclusa, it sits Avith the wings folded sharply over the back, with the 
fore legs held straight out in front and the tufted tail upeurved. 
Food plant. — Populns tremuloides. 
Geographical distribution . — This species is a member of the Appalachian fauna. Brunswick, 
Me. (Packard); Kittery Point, i\te. (R. Thaxter); Maine (U. S. Ifat. Mus.); Maine, Canada 
(French); var. luculenta Indiana (French). 
Ichthyura inclusa Hiiliner. 
(PI. Ill, figs. 17-19.) 
Phalama anasiomosa Abbot and Smith, Nat. Hist. Lep. Ins. Georgia, 1797. 
Ichthyura inclusa Hiibu., Zntr. Dritt. Hand., p. 36, ligs. 561, 562, 1825. 
Clostera ainericana Harris, Uep. Ins. Mass., p. 314, 1841, 3d edit., PI. VI, fig. 12, and figs. 213-215. 
Ichthyura /acZasa Walk., Cat. Lep. Het. Br. Mus., iv, p. 1059, 1855. 
Clostera americana Fitch, Fifth Rep. Nox. Ins. N. York, p. 65, 1859. 
Ichthyura inclusa Morris, Synopsis Lep. N. Amer., p. 244, 1860. 
Pack., Proc. Ent. Soc. Phil., iii, p. 351, 1864. 
