MEMOIKS OF THE NATIOI^AL ACADEMY OF SCIENCES. 
167 
Pupa , — S . Body rather slender, mnch as in Lophodonta. Head rounded as usual. Abdominal 
segments smooth, sparsely and tinely pitted; end of the abdomen smooth, ending in a short, very 
broad, cremaster, bearing near the outer edge on the underside four or five short sjunes and with 
two si»ines, one on each side, at the end. Yestiges of the larval male sexual aperture with an oval 
area on each side. Length, 17 mm. 
Food plantH, — Willow and po])lar. 
Habits. — The caterpillar of this moth has been reared by Mr. Tepper in New York. It was 
found on the poplar rJuly 4, the moth appearing July 27. (Bull. Ent. Soc. Brooklyn, i, 10.) 
Messrs. Edwards and Elliot have found the food plant to be the willow. 
This singular caterpillar is not uncommon at Brunswick, Me., late in August. It has the 
peculiarity of raising and depressing the two large dorsal horns in the middle of the body; when 
at rest thej’- ai*e depressed, appearing simply as humps; when erect they are somewhat larger and 
■evaginated, with their ]>seudojoints like those of a telescope; probably they serve to frighten away 
ichi»eumous. 'SVy specimens molted for the last time August 31. 
A caterpillar of this sx)ecies Avas observed feeding on the extremity of a partially eaten leaf 
of poplar, and its oblique markings bore a striking resemblance to the twisted, partly dead, and dry 
portion of the leaf. The larva stood feeding in a A^ery conspicuous i)osition, and Avould easily be 
mistaken for an end of the [)Oplar leaf. 
The larva occurs in March, May, June, July, xVugust, and September. (Biley MS.) 
Geographical distribution. — This species is not uncommon in Maine, Canada, and southern New 
England, inhabiting the Appalachian subproAdnce. Orono, Me. (Mrs. Fernald); Brunswick, Me. 
(Packard); Amherst, JMass. (Mrs. Fernald); Brookline (Shurtleff) ; Williainstown, Mass. (Nason fide 
Grote); New Jersey (Palm); Chicago, 111. (Westcott); Brooklyn, N. Y. (Tepper, Elliot); Plattsburg, 
N. Y. (Hudson); New York, Canada, Pittsheld, N. H.; Maine (U. S. Nat. Mas.); Canada, Maine, 
Massachusetts, Wisconsin, Tiffin, Ohio; Chami)aign, 111. (French). The dark form pcfci/icrt Behr 
occurred in Placer County, Cal. 
Notodonta simplaria Graef. 
(PI. IV, fig. 6.) 
Notodonta smplavi'a Graef, Bull. Ent. Soc. Brooklyn, iii, p. 95, 1881, pi. 1. (The figure scarcely recognizable.) 
Grote, Check Cist N. Aiuer. Moths, p. 18, 1882. 
Smith, List Lop. Bor. Amer., p. 30, 1891. 
Kirby, Syn. Cat. Lep. Het,, i, p, 601, 1892. 
Pheosia simplaria Keura. and Dyar, Trans. Amer. Ent. Soc., xxi, p. 195, 1894; Journ. N. Y. Ent. Soc., ii, x). 
113, Sept., 1894. 
This is a true Notodonta. The autemiie are iiectiuated in tlie same maimer. Fore and hind 
wings a little sharper at the apex, especially the hind wings, hinder edge of collar and inner 
edge of patagia black, and a black spot oAau’ the scutellnin. Thorax gray, dark behind. 
Fore Aving.s granite ash-gray, and rather dark, blackish at base. On the inner third of the 
wing is a transverse scalloped line, the end of the line oblique, directed inward, and ending on 
the short broad tuft. A distinct linear discal spot encircled by whitish scales. Exti’udiscal line 
much excurved, so as to reach a point halfway betAveeu the discal spot and the apex of the wing; 
it is not Avavy in its oblique course iu the mediau interspace, but scalloped on the submedian 
space, and ending on the hind edge in a distinct, not AA*avy line, exactly parallel with that ending 
on the tooth. A subniarginal roAv of dusky intcrvenular round spots; fringe AAffiite, with seveu 
black dots. Hind wings Avhitish, a linear diftiise discal discoloration, but with no transverse 
difthse mediau hand. 
Underside of the wings uniformly pale Avliitisli gray, a diffuse dark extradiscal line, Avith 
discal spots. (Description draAvn up from a S compared by Mrs. Slosson with Mr. Graef ’s type.) 
Expanse of Avings, 3 , 48-50 mm.; length of body, S , 19-20 mm. 
Geographical distribution. — Catskill, N, Y^., August (Graef); St. Johns, New BruusAvick 
(H. Edwards); New York (French). 
Note. — Hotodonta plagiata Walk., Oat. Lep. Het. Br. Mus., vii, p. 1749, 1850, belongs to the 
European A. tritoplius (fide Grote and Kobinson), with an erroneous locality. 
