MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 263 



Cerura Sehrank.' 



(PI. XLVII, figs. 5, 6, 6o, 66, venation. PI. XLVIII, figs. 7, 14, 15, palpus.) 



'Cerura, in part, .Scliiank, Fauna Boiea, ii (2), p. 155, 1802. 

 Cerura Latreille, Genera Crust, et Insect, iv, p. 219, 1809. 

 "Dkranura Latreille." - ( *) 



Uarpyia Ocliseuheimev, Schm. Eur. Bel., ii, p. 19, 1810. 

 Andria Hiibu., Tentanicn., p. 1, 1810? 



■HarpijUi aud Iliirpi/ias lliibner, Verzeichniss Schmett., p. 148, 1816. 

 Pditia DaluKUi, Aual.F.nt.,p.92, 1823. 



Dicraniira Griffith, Cuvier's An. KiugilDni, xv, p. <)12, 1832. 

 Boisil., Gen. et Ind. Mtth., p. 84, 1840. 

 Duponcbel, Cat. Meth. Lep., p. 87, 1844. 

 Harpyia Staudiuger, Cat. Lep. Eur., p. 72, 1871. 

 Cerura Packard, Proo. Ent. Soc. I^liil., iii, p. 375, 1864. 



Grote, New Check List N. Amer. Moths, p. 29, 1882. 



Smith, List Lep. Bor. Amer., p. 31, 1891. 



Kirby, Syn. Cat. Lep. Het., i, pp. 585, 930, 1892. 



Neum. and Dyar, Trans. Amer. Ent. Soc, xxi, p. 188, 1894. 



Moth. — i and 9 . Head unusually large, front broad, subtriangular, much broader in S than 

 J , pilose. Antennte short, about the length of the thorax, densely scaled above, very broadly 

 pectinated, the branches becomini;- much shorter at the tips; in 9 tlie branches are short but 

 distinct. Eyes naked. Maxilhe rudimentary, separated, extending a little way beyond the scales 

 -of the front. Palpi unusually short and small, thinly scaled, and concealed by the hairy front. 

 Scales of the thorax and patagia either close and short or loosely jnlose. Fore wings rather long 

 and narrow, less than half as broad as long; costa straight, suddenly rounded at the apex; outer 

 ■edge entire, very oblique; internal angle rounded. 



Venation: Subcostal cell minute; third subcostal venule short; the apical or third subcostal 

 intersi)ace broad, triangular; sixth subcostal (III2) independent, arising in the middle of the 

 ■discal space. 



Hind wings a little produced toward tlie apex, reaching halfway to the tip of the abdomen 

 costa slightly convex; outer edge oblique, the upper i)art straight, thence rounded; internal angle 

 rounded. Vein II short, one half as long as in Macrurocampa. Posterior discal vein in both 

 wings much curved. 



Legs rather slender, with long sparse hairs; hind tibi;i? with two minute spines. Abdomen 

 somewhat flattened, tip broad and jiilose. 



Coloration: All the species white or whitish ash, with wavy transverse bands on the fore 

 wings or a broad dark median band, and a large oblique subapical dark blotch, with discal dots 

 ■or discal rings. 



The species are readily recognized by the large broad heail, small feeble palj)!, the broadly 

 ,pectinated S antennie, those of the 9 also iiectiuated; the narrow wings, the white and pale gray 

 ground color, and the peculiar markings of the fore wings. 



Egg. — Flattened, hemispherical. 



Larva. — Head large, broad; prothoracic segment wider than the head, with a pair of lateral 

 tubercles; anal legs filamental, forming stemapoda, with an eversible llagellum. Freshly hatched 

 larva with long stemapoda, slightly longer than in the last stage; the lateral prothoracic horns 

 longer than in the mature caterpillar; body entirely brown above. . 



' Schrank in Fauna Boica, 1802, proposed Cerura for lerrifica {vidua Knoch), fagi, vinula, and furcula. In 1810 

 Ochsenbeimer created Harpyia, under which he first mentions vinula, which should be reserved for thi.s genus. In 

 1810 Hiibner placed fagi in Terasiou (which preoccupies Stephen's Stauropus), and terrifica into Hojditis (together 

 with H. meone Cr. ), aud retained rinula together with ermiuea Esper for Ochsenheimer's genus Harpyia, which is a 

 good genus, aud then directly created Harpyias for furcata, bifida, and bicuspis, and an American species, for which 

 it would be most proper to retain Schrank's first given name, Cerura, aud drop eutirely the rather objectionable 

 name of Harpyias. 



= In Latreille's Gen. Crust, et Insect., 1809, the name Cerura appears: nor is Dicrannra mentioned by him in his 

 Considerations gf^ncrales (1810), nor in his Families naturelles du Eeguo Auiiuul (1825). It is not meutioued in 

 Agaasiz's Nomenclator, nor iu Scudder's Xomenclator Zoologicus. It is possibly a manuscriiit name adopted by 

 Boisduval. 



