MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 147 



Zophotiontd I'Mck., Proo. Eiit. f^oc. I'liil,. iii, p. 3o8, 1864. 



Groto, Check List X. Aiucr. M.iths, ]). in, 1882. 



Smith, List Lep. Bor. Amur., p. oO,lS!)l. 



Kirby, Syn. Cat. Lep. Het., i, p. 601, 1892. 

 Lopliotloiila aiul I'heosia ia part, Neuiu. anil Dyar, Trans. Anier. Ent. Soc, xxi. p. 196. .June, 1894 ; .lourn. N. Y. 



i;nt. Soe., ii. p. 115, Sept., 1894. 



Head larger tliau in Notodoiita, with the front pihise in <J , the hairs passing a little beyond 

 the front. The autennie are more broadly ])eetinated than in Notodonta, but in the 9 simple, 

 though densely ciliated. The eyes are nake<l. The thorax is slightly crested in front, with a 

 posterior low median tuft of pale blue and black metallic scales. 



Fore M'ings more triangular than u.siial; the costa straight, apex produced, Hiough rounded 

 at the tip; internal edge nearly straight, tufted much as in Notodonta. Venation: Very similar 

 to that of Notodonta (N. hattitviens), there being no subcostal cell, only ditfering in the second and 

 third subcostal venules, originating very uear each other; venation of the hind wings the same 

 as in Notodonta. Hind wings with the costa straight; the outer margin much shorter than in 

 Notodonta. 



Although the larva is so difl'erent from that of Notodonta, the adult is very similar, dilfering 

 chiefly in tlie longer palpi and the longer branches of the antenna'. 



Coloration much as in Notodonta, with transverse waved lines on the fore wings. Our 

 sjjecies are congeneric with Notodonta dromeduria of Europe, L. fcrruginea resembling it closely 

 in markings and color.s. I find that the European Peridea trepida Esp. tremnlu (S. V., Hiibn.) 

 has the same venation, with no subcostal cell, as our three species of Lophodonta, and when the 

 European genera undergo the necessary revision the genus Lophodonta may have to be dropped 

 for Stephen's Peridea. 



E(ig. — Hemispherical, rather high; shell finely pitted, with microscopic, dense, crowded 

 granulations; no polygonal areas. 



Laica. — Body much as in Nadata, but the head is smaller and it has no such suranal plate, 

 this being small and rounded at the end, while the body is smooth, the skin not granulated. 

 From Notodonta it differs in the body being noctniform, not humped. A faint double median 

 dorsal line and a lateral line; the whole body pea green. Spins no cocoon. When young the 

 cateri)illars, according to Dyar, I'est on a perch. 



Pupa. — Body full and plump, the end of the abdomen very much rounded and obtuse, with 

 no distinct cremaster. 



UiO(ji(iphical distribution. — So far as is yet known, this genus is confined to the Appalachian 

 subprovince and to western Europe. 



SYNOPSIS OF THE .SPECIE.S. 



Mouse-gray, \Tith uo reddish median band on the foro wings; extradiscal line not siuuous L. auqulosa 



Brick-reddish; a broad median brielc-retl Ijaud on lore ^Yings; extradiscal line siuuous J., firrmjinea 



Ash-gray; base ol' fore wings within the extrabasilar scalloped line rusty brown L. haaitriens 



Lophodonta angulosa ^.\bbot and Smith). 



(Plate IV, fig. 3.) 



rhalwna angulosa Abbot and Smith, Nat. Hist. Lep. Ins. Georgia, p. 165, Taij. LXXXIII, 1797. 

 Xotodonta angulosa Walk., Cat. Lep. Het. lir. ilus.. v, p. 999, 1855. 

 Morris, Synopsis Lep. N. Amer., p. 239, 1862. 

 Lophodonta angulosa Pack., Proc. Ent. Soc. Phil., iii, p. 3.58, 1864. 



Grote, Check List. N. Amer. Moths, p. 19, 1882. 



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



Kirby, Syn. Cat. Lep. Het., i, p. 601, 1892. 



Neum. and Dyar, Trans. Amer. Ent. Soc, xxi. p. 196, June, 1894; Journ. N. Y. Ent. 



Soc., ii, p. 115, Sept., 1894. 



Larva. 



(PI. XVII. fig. 5.) 



Dyar, Proc. Best. Soc. Xat. Hist., .xxvi, p. 162, 1894. 



Moth. — Two 9 . Body and wings mouse or ash-gray, with no brick-reddish scales except on 



the lines. Thorax mouse-gray, behind the middle a rounded snbtriaugular area inclosing paler 



tawny scales, and bordered with steel-blue scales. Fore wings with a basal angulated line bent 



