MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 263 



Cerura Suhrauk.' 



(PI. XLVII, figs. 5, l), 6((, 6/1, venation. PI. XLVIII, figs. 7, 14, 15, palpus.) 



Cerura, in part, ScUvanli, Fauua Boica, ii (2), p. 1.55, 1802. 

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

 "Dirranura Latreille."" (f) 



7/rtc^i//« OchseuUeiiner, Sclim. Eur. !!<!., ii, ]i. 19, 1810. 

 Anilria Hiibu., Teutamen., ji. 1, 1810f 



Harpijia and Harpiiias Hilbner, ^'erzeicllniss Schmett., ji. 148, 1816. 

 Pallia Dalmau, Anal. Ent., p. 92, 1823. 



Dicrariiira Griffith, Cuvier's An. Kingdom, xv, p. 612, 1832. 

 lioisd.. Gen. et Ind. MHh., p. 84, 1840. 

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

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

 Cerura Packard, I'roc. Ent. Soc. Phil., iii, p. 375, 1864. 



Grote, New Check Li.st N. Amer. Moths, p. 29, 1882. 



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



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



Nenm. and Uyar. Trans. .Vmer. Ent. Soc. xxi, p. 188, 1894. 



Moth. — S and 9 . Head unusually largo, front broad, subtriaiigular. uuicli broader in S than 

 9 , pilose. Antenna; short, about the Icugtli of the thorax, densely scaled above, very broadly 

 pectinated, the branches becoming miieli shorter at the tips; in 9 the branches are short but 

 distinct. Eyes naked. ^Maxilla- 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 ])ilose. Fore wings rather long 

 and narrow, less than half as broad as long; costa straight, snddcidy 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 

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

 ■discal si)ace. 



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

 costa slightly convex; outer edge oblique, the upper part 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 tibia' with two minute si)ine.s. Abdomen 

 somewhat flattened, tip broad and pilose. 



Coloration: All the species white or whitish ash, with wavytransver.se bands on the fore 

 wings or a broad dark meilian band, and a large obli(iue subapical dark blotcli, with discal dots 

 or discal rings. 



The species are readily recognized by the large In-oad head, small feeble paljji, the bioadly 

 pectinated S antenna-, those of the 9 also pectinated; the narrow wings, the white and pale gray 

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



-£(/(/. — Flattened, hemispherii-al. 



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

 tubercles; anal legs tilamental, forming stemapoda, with an eversible liagellum. 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. 



' Sehrank in Fauna Boica, 1802, proposed Cerura for ierrifiea (vidua Knoch),fagi, vinula, and furcula. In 1810 

 Oclisenheimer created Harpyia, under which he first mentions rhiiila. which should be reserved for this genus. In 

 1810 Hiibner placed fagi in Terasion (which preoccupies Stephen's St.auropus), and terrifica into Hoplitis (together 

 with B. mcone Cr.), and retained vinula together with erminea Esper for Ochsenbeimcr's genus Harpyia, which is a 

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

 it would be most proper to retain .Schrank's first given name, Cerura, and drop entirely 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 genf^rales (1810), nor in his I'arailles naturelles du Eegne Animal (1825). It is not mentioned in 

 Agassiz's Nomenclator, nor in Scudder's Xomeuclator Zoologicus. It is possibly a manuscript name adopted by 

 Boisduval. 



