142 MEMOIRS OF TOE NATIONAL ACADEMY OF SCIENCES. 



Legs hairy, the hind tibiic with h)iis' scales spreading out\v;ii(l: two i)airs of si)urs, the apiual 

 ones niui-h larger tliaii tlic tirst jiaii'. AIkIomicii in i rather bi-oad, witii rather jjroniinent hiteral 

 tnl'ts, adding to tlie breadth of the hind body. 



The genns dift'ers from its allies in the well pectinated antenna', the hirge palpi, the high 

 sharp thoracic tuft, and the scalloped tore wings, the species being yellow odierous, with two twin 

 silvery white discal dots. 



Effg. — Hemispherical. 



Lan-ii. — r.ody cylindrical; piliferons warts minnte; no tubercles or linni]>s present: the 

 ornamentation consisting only of two yellowish subdorsal bands, with no spots. Freshly hatched 

 larva in shape like the mature larva, only the heail is larger in jiroportion and the body is 

 provided with bulbous glandular hairs. 



The larva does not spin a cocoon, probably entering the earth to pni)ate. 



I'lqxi. — Stout, thick; cremaster ending in a conical stout spine, with four u])cnrved spinules. 



(ieofiraphical distribution. — The single species known ranges from .Maine and Canada to Oregon 

 and southward on the Pacific Coast to California, and on the Atlantic Coast to the Gulf States, 

 including Florida and Texas. The genus thus prevails over the Appalachian, Austroripariau, 

 and Campestrian subprovinces, spreading throughout the whole of America north of Mexico 

 and south of the Iludsonian fauual limits. 



Nadata gibbosa .\libot and .Smith. 

 (I'l. .WII, tig. 3.) 



I'luihiiiK (iilili:i>in Alibot and Smith. Lt'i). Ins. (ieorgia. p. 1G3, Tali. I^XXXII. 1797. 

 ('immuirU-liii'fiihhosti Hiilju.. .S.animl. Kxot. .Schmctt., iii, Taf. XIX, fig. 1-4, Penii.. ISll!. 

 XmlalK (jihhusa Walk., Cat. Lep. lU-t. Br. Mas., v, p. lOGl', 1855. 



Pack., Proc. Eiit. Soc Phil., iii, )). .356. 1804. 

 Aliistiir gihhosa Hoisd., Lep. C'al., p. 87, 18130. 



Grote, Check List N. Anier. Moths, p. 18, 1882. 

 Xaitatu ijibbosa Smith, List Lep. Bor. Atner., p. 30, 1891. 



Neum. and Dyar. Trans. Anier. Ent. .Soc, xxi, p. 180, .Inue, 1894 ; Jomiii. X. V. Eut. Soc, 11, p. 

 113, Sept. 1894. 

 Xaduta dotihledai/i Pack., Proc. Ent. Soc. Phil., iii, p, 365, 1864. 



Grote, Check List X. .\nier. Moths, p. 18, 1882. 

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

 Kirby, Syn, Cat, Lop, Het., i, p. 614, 1892. 

 yadidd donbUdaiji, var. oregonenxis, Butler, Ann. and M.ag. Nat. Hist., Oct. 1881, p. 317. 



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

 Xadalii bihreiisii H. Edwards, Ent. Amer, i, ]>. 49, .lunc, 1885. 



Xaddia (jihhosa, var. ntbripennin Xeum. and Uyar, Jonrn. N. Y. Ent. Soc, i. ji. 24, >Iarch, 1893; Trans. .Vnier. 

 Ent. Soc, xxi, p, 186, 1894; Jour. X, Y. Eut. Soc.,ii, p. 113, Sept. 1894. 



Larva. 



(PI. XVII. ligs. 1. la, l/i, 2, 2<i.) 



Abbot and Smith, Lep. Ins. Georgia, PI. LX.X.XII. 1797 (colored tig.). 1 iill-lcd larv.i. 



JJariiK, Ent. Corresp., p. 308, 1869. 



BoUduval, Lep. Cal., p, 87, 1869. 



TJnItier, Ent. Contr., iii, p. 150, 1874, tig. 8 (nncolorcd fig.). Full-fed larva, 



I'achaid, American Naturalist, viii, p. 691, 1874. ((||uotes Lintner,) 



I{ikii, 5th Rep. li. S. Ent. Comm. ou Forest aud Shade Tree Insects, iip. 153, 424, 1890, PI. XI; ibid. (fig. 6, 



colored fig. from drawing b.v Lintner). 

 Soiile, P.syche, vi. p. 197, Dec, 1891, (Description of egg, five larval stages, and jiupa.) 

 I'ackitid, Journ. N. York Ent. Soc, i, pp. 57, .5S, ,)une, 1893. (Five stages described.) 



Motli. — Of a uniform light but!', with a rusty tinge; fore wings a little deei)er in tone, with an 

 extnidiscal slightly curved ferruginous line, parallel with the margin. Two small silvery discal 

 dots, varying m size; the di.scal space within these dots clearer than the rest of the wmg. An 

 inner straight rusty line, which is slightly bent below the cubital vein. The wings beneath much 

 paler. Tlie fringe between the points of the .scallops is white. Hind wings above of the .same 

 pale hue as the underside of both jjairs of wings. 



