MEMOmS OF THE NATIOISTAL ACADEMY OF SCIENCES. 167 



Piipn. — S . Botly ratlier sleuder, mucli as in Lopboiloiita. Head rounded as usual. Abdominal 

 segnieuts .smooth, sparsely and finely pitted; end of the abdomen smooth, ending- in a short, very 

 broad, cremaster, bearing near tlie outer edge on the underside four or five short spines and with 

 two spines, one on each side, at the end. Ve.stiges of the larval male sexual aperture with an oval 

 area on ea(;h side. Length. 17 mm. 



Food pl(tiit.s. — Willow and poplar. 



Habits. — The cateriiillar of this moth lias been reared by ]Mr. Tejiper in Xew Yorlv. It was 

 found on the poplar July 4, the moth appearing July 27. (Bull. Ent. Soc. Broolclyn. i, 10.) 

 Messrs. Edwai'ds 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 they are depressed, appearing simply as humps; when erect they are somewhat larger and 

 evagiuated, with their psendojoints like those of a telescope; probably they serve to frighten away 

 ichneumons. My specimens molted for the last time August 31. 



A caterpillar of this species was ol)served feeding on the extremity of a partially eaten leaf 

 of poplar, and its obli(]ue markings bore a striking resemblance to the twisted, partly dead, and dry 

 portion of the leaf. The larva stood feeding in a very conspicuous position, and would easily be 

 mistaken for an end of the poplur leaf. 



The larva occurs in 3Iarch, J\Iay, June, July, August, and September. (liiley MS.) 



GeotjrapMcal d'iKtrilnttioii. — Tliis s])ecies is not uncommon in Maine, Canada, and southern 'New 

 England, inhabiting the Appalacliinn subpinvince.. Orono, Me. (Jlrs. Fernald); Brunswick, Me. 

 (Packard); Amherst, Mass. (Mrs. Fernald); Brookline (Shurtleff); Williamstown, Alass. (Nason./tfZe 

 Grote); New Jersey (Palm); Chicago, III. (Westcott); Brooklyn, N. Y. (Tepper, Elliot); Plattsburg, 

 N. Y. (Hudson); New York, Canada, Pittsfield, N. H.; Maine (U. S. Nat. Mus.); Canaila, .Maine, 

 Massachusetts, Wisconsin, Tifliii, Ohio; Champaign, 111. (French). The dark form jMC/yica Behr 

 occurred in Placer County, Cal. 



Notodonta simplaria Gr.aef. 



(PI. IV, fig. G.) 



Notoilonin simplaria Graef. Bull. Ent. Soc. lirooklyu, iii, p. 9.5, 1881, pi. 1. (The figure scarcely roc(>gnizal)le.) 



Grote, Check List N. Auier. Jloths, p. 18, 1882. 



Smith, List Lep. Bor. Amer.. p. 30, 1891. 



Kirl)y, Syu. Cat. Lep. Het., i, p. 601, 1892. 

 Phcosia simplaria Neniii. and Dyav, Trans. Amer. Ent. Soc, xxi, p. 195, 1894; Joiirn. N. Y. Ent. Soc, ii, p. 

 113, Sept., 1894. 



This is a true Notodonta. The antenna- are pectinated in the same manner. 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 over the scutellum. Thorax gray, dark behind. 



Fore wings 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 di.scal spot encircled by whitish scales. Extradiscal line 

 much excurved, so as to reach a point halfway between the discal spot and the apex of the wing; 

 it is not wavy in its obli(iue course in the median inter.space, but scallo])ed on the submcdiau 

 space, and ending on the hind edge in a distinct, not wavy line, exactly parallel with that ending 

 on the tooth. A submarginal row of dusky intervenular round spots; fringe white, with seven 

 black dots. Hind wings whitish, a linear diffuse discal discoloration, but with no transverse 

 diffuse median band. 



lTnder.side of the wings uniformly pale whitish gray, a diffuse dark extradiscal line, with 

 discal spots. (Description drawn up from a S compared by Mrs. Slosson with Mr. Graef 's type.) 



I']xpanse of wings, c? , 18-50 mm.; length of body, $ , 19-20 mm. 



(ieoi/raphical distribution. — Catskill, N. Y., August (Graef); St. Johns, New Brunswick 

 {H. Edwards); New York (French). 



Note. — Notodontu pUnjiuta Walk., Cat. Lep. Het. Br. iMus., vii, p. 1749, 1850, belongs to the 

 Euroiiean A. tritophus (tide Grote and Eobiuson), with an erroneous locality. 



