MEMOIRS OF TOE NATIONAL ACADEMY OF SCIENCES. 131 



Larva. 



rarhurd. Fiftli Kcp. U. S. F.nt. Comin. liis. iiij. Forest Trees, 11. 453, 1890. 



Moth. — One iiuilc. SiinilkM- and (liillcr bidwii than /. (ipicnUs, with a slight lihvc tint on the 

 head, tliorux, and Iok^ \viu,i;s. I'alpi wliiMsh below, dark blown above, as in I. (ipicalis; front of 

 head slightly broader and .sqnarer; niediaii thoracic brown band as in I. (ipirdlh. Fore wings 

 with the co.stal edge straighter and the apex less tinned np than in /. «/;/cv(//.v, the ajjex being 

 slightly more ronnded than in tiiat species or in /. iiivliisK. IJasal line distinct, making a sharp 

 angle on the cubital vein, and more incurved in the snbcnbital .sitace tliaii in /. apicaiis; second 

 line much more suddenly incurved than iu I. (qticalis, the same Hue being straight in I. IwUtsn; 

 the short third line as iu I. apicalis, but more sinirous. Fourth and outer line much as in L 

 apicalifi, but the species differs from all the others known by the large conspicuous irregular 

 whitish ocherous ]>atch which tills in the costal curve of this line and extends halfway from the 

 ccstal end of the line to the apex of the wing; no deep brickred discoloration on each side of 

 costal half of fourth line, so distinct in T. apicalis, but a long distal blackish stripe extends along 

 the tirst cubital venule to the submarginal row of brown dots, which are not so distinct as iu /. 

 apicalis or I. inclus-a, thougli the marginal row of dark brown lunnles is as distinct as in I. iiiclusa. 

 Fringe as in /. incliisa, but that on the hind wings much darker. Hind wings darker than in 

 I. apicalis. Wings beneath much as iu I. apicalis, but there is no leddish tint toward the apex> 

 and the white oblique co.stal streak is much less distinct. There are traces of a common brown 

 diffuse line. Abdomen a little shorter, the fan or tnit of scales perhaps shorter and expanding 

 wider. 



Expanse of wings, 25 mm.; length of body, 12 mm. 



This species differs from I. inclasa and (tpicalis in the ti-ansverse lines on the fore wings being 

 very much more sinuous, and it need not be confounded with any of our other species. The white 

 costal mark is oblique and curved much as iu apicalis. 



Larva be/ore the last molt. — Head broader than the body, flattened iu front, dull black, with 

 long white hairs. Body flattened, with yellow and reddish longitudinal stripes; three dorsal faint 

 red stripes on a yellowish ground, and three deep lake-red lateral stripes, tlie lowermost the 

 broadest and deepest in hue. Two bright yellow lateral stripes. Five pairs of tiesh-colored 

 abdominal legs, which are pale amber, colored like the underside of the body. Length, 9 mm. 



Larra after the last molt. — Markings much as in the previous stage. Length, 17 to 18 mm. 



Cocoon. — The rude cocoon is formed by tying a few leaves togetlier, gathering them by a web 

 at the edges, thus forming a roomy chamber, partly lined with silk, within which tlie chrysalis 

 rests. 



Pupa. — Smaller and not so full and rounded at the end as in I. inclnsa; cremaster as in that 

 species, ending in two stout, very short, recurved spines. Length, 12 mm. 



Eabits. — The caterpillar of this interesting species was found July .30, at Brunswick, Me., 

 feeding on the aspen [Popuhis trcmnloides). It molted August 10, and about the 20th began to 

 spin a silken cocoon between two leaves. The moth (a male) appeared in the breeding cage at 

 Providence, 3Iay 20. Like I. inclusn, it sits with the wings folded .sharply f)ver the back, with the 

 fore legs held straight out in front and the tufted tail upcurved. 



Food plant. — Popuhis tremiiloides. 



Geographical distribution. — This species is a member of the Appalachian fauna. Brunswick, 

 Me. (Packard); Kittery Point, Me. (R. Thaxter): "Maine (U. S. Nat. Mus.); Maine, Canada- 

 (French); var. hiculenta Indiana (French). 



Ichtliyura iuclusa Hiibner. 

 (PI. Ill, tigs. 17-19.) 



PhaI(Fna anaftlomona Al)bot aii<l Sinitli, Nat. Hist. Lep. Ins. Georgia. 1797. 

 Iclitliiiiira inclnsa Hiibu., Zutr. Dritt. Himd., p. 36, figs. 561, .562, 1,S25. 



Clostera iimcricana Harris. Kej). Ins. Mass., p. 314, 1841, 3(1 eilit., I'l. VI, lig. 12, and figs. 213-215. 

 Ichthyiira inc?«sa Walk., Cat. Lep. Het. Br. Mas., iv, p. 10.59, 1855. 

 Clostera americana Fitcli, Fifth Rep. Nox. Ins. N. Yorli, p. 65, 1859. 

 Ichthyiira inclusa Morris, .Synopsis Lep. X. Amer., p. 244, 1860. 

 Pack., Proc. Ent. Soc. I'liil., iii, p. 351, 1864. 



