142 MEMOIKS OF THE XATIOXAL ACADEMY OF SCIEXCES. 



Legs hairy, the hiud tibhi' with long se;des spreading outward; two ])airs of spurs, the apical 

 ones nuu-h larger than the first pair. Abdomen in S rather broad, with rather prominent lateral 

 tufts, adding to the breadth of the hind body. 



The genus differs from its allies in the well pectinated antenna', the large palpi, the high 

 sharp thoracic tuft, and the scalloped fore wings, the species being yellow ocherous, with two twin 

 silvery white discal dots. 



Egg. — Heuiispherical. 



Larva. — Body cylindrical; i)iliferons warts minute; no tubercles or humps present; the 

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

 larva in shape like the mature larva, only the head is larger in proportion and the body is 

 provided with bulbous glandular hairs. 



The larva does not spin a cocoon, probably entering the earth to pupate. 



I'lqya. — Stout, thick; creniaster ending in a conical stout spine, with four upcurved spiuules. 



Geographical di.stributioii. — The single species known ranges from Maine and Canada to Oregon 

 and southward on the raclflc 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 Hudsonian faunal limits. 



Nadata gibbosa Alibot and Smith. 

 (PI. XVII. lig. 3.) 



Plialwna f/ihhosa Alibot .ind Smith, Lep. Ins. Georgia, p. 163, Tab. LXXXII. 1797. 

 Cosmotrichaxjlhhoiid Hiibu., SamQil. Exot. Schiuptt.. lii, Taf. XIX, fig. 1-4, Peiui., 1816. 

 Xadata <jibhosa Walk., Cat. Lep. Het. Br. Mas., v, p. 1062, 1855. 



Pack., Proc. Ent. Soc. Phil., iii, p. 356, 1864. 

 J/«»(o)- (/i&fcosa Boisd., Lep. Cal., p. 87, 1869. 



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

 Xadata (jibhosa Smith, List Lep. Bor. Amer., p. 30, 1S91. 



Xeum. and Dyar, Trans. Amer. Eut. Soc, xxi, p. 186, June, 1894 ; Joiirn. N. Y. Ent. Soc., ii, p. 

 113, Sept. 1894. 

 Xaduta doiMidayi Pack., Proc. Ent. Soc. Phil., iii. p. 365, 1864. 



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

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

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

 Nadata douhledayi, var. oreijonensis, Butler, .Ann. and Mag. Nat. Hist., Oct. 1881, p. 317. 



Smith. List Lep. Bor. .\mer., p. 30, 1891. 

 Nadaia hehrensii H. Edw.ards. Ent. Amer., i. p. 49, June, 1885. 



Nadata gibbosa, var. rnbripeiiiiis Neum. and Dyar, Journ. N. Y. Ent. Soc, i, p. 24, March, 1893; Trans. Amer. 

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



Larva. 

 (PI. XVn, tigs. 1. la, 16, 2,2n.) 



Alibot and Smith, Lep. Ins. Georgia, PI. LXXXII, 1797 (colored fig.). Full-fed larva. 



Harris, Eut. Corresp., p. 308, 1869. 



Boisdural, Lep. C'al., p. 87, 1869. 



Linliier, Eut. Contr., iii, p. 150, 1874, fig. 8 (uncolored fig.). Full-led larva. 



Packard, American Naturalist, viii, p. 691, 1874. (Quotes Lintner.) 



Milei/, 5th Rep. U. S. Eut. Comm. on Forest and Shade Tree lusects, pp. 153, 424. 1890, I'l. XI; ibid. (fig. 6, 



colored lig. from drawing by Lintner). 

 SoiiJe, Psyche, vi, p. 197, Dec, 1891. (Description of egg. five larval stages, .and pupa.) 

 Packard, Journ. N. York Ent. Soc, i, pp. 57, 58, June, 1893. (Five stages described.) 



Moth. — Of a uniform light buff, with a rusty tinge; fore wings a little deeper in tone, with an 

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

 dots, varying in size; the discal space within these dots clearer than the rest of the wing. An 

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

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

 pale hue as the underside of both i)airs of wings. 



