270 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Geographical distribution. — Oroiio and .Moiuit Jieseit, Me. (Mr.s. Feiuald); iiiuuswick, Me. 

 (Packard); Massachusetts (Harris); Fraucouia, N. H., coiiimou (Mrs. Slossoii); easteru New- 

 York (Liutncr, Edwards, Dyar); riattsbura', X. Y. (0. II. Hudson); Canada, ^fainc, New York, 

 Pennsylvania, Wisconsin, Illinois, Texas (Frencb); Pennsylvania, Wisconsin, and Montreal, 

 Cauada ( Liutner) ; thus far not known to occur beyond the limits of the Appalachian subprovince. 



Cerura scolopeudrina I'xasduval. 



(PI. VI, ligs. IS, U.) 



I'hulivna furcula khhnt nmX Smith, Lep. lus. Georgia, 171)7. 



Vicraiiuia scolopendriiui Boiscl., Lop. de la Cal., p. 86, 1869. 



Cerura aqiiiloiiaris Lint., Eiit. Coutr., iv, p. 85, June, 1878. 



Harpyia albicomu Streck., Proc. Acad. Nat. Sui. Phil, for 1884, p. 281, Jiin., 1885. 



Cerura bicuspis Butk-r, Aun. Mag. Xat. Hist., viii, p. 31, Oct. 7, 1881. 



Smith, List. Lep. IJor. Anier., p. 31, 1891. 

 Cerura scolopendrina Dyar, Can. Eut., xxiii, p. 181), Sept., 1891. 

 Cerura aquilonaris Grote, New Check List N. Amer. Moths, p. 20, 1882. 

 Cerura modesta Hadsou, Can. Ent., xxiii, p. 197, Sept., 1891. 

 Cerura acolopendrina Kirby, Cat. Lep. Het., i, p. .WS, 1892. 

 Cerura aquilonaris Kirby, Syn. Cat. Lep. Het., i, p. 588, 1892. 



Cerura scolopeudrina Neiim. and Dyar, Trans. Amer. Eut. Soc, xxi. p. 189, 1894; .lourn. N. Y. Ent. Soc., ii, 

 p. 114, 1894. 



Larva. 



Thaller, Can. Eut., xxiii, p. 34, Feb., 1891. (Food plaut only mentioned.) 



Dyar. Proc. Bost. Soc. Nat. Hist., xxvi, p. 159, 1894. (Entire life history probably of this .species, the moth 

 not being bred. ) 



Moth. — Nine S , three 9 . Body as in C. borealis, but the end of the abdomen is white, with 

 longer hairs. Fore wings with the median dark band moderately broad, usually straight on the 

 insifle, and irregular, scalloped, on the outside, and intciriiptcdly edged with ochcr-yellow; 

 extrabasilar line with four black dots forming a straight line, straighter than in C. borealis. Discal 

 mark small, three extradiscal faint darl; scalloped lines, and within these a short scalloped line 

 parallel to the outer edge of the band, beginning on the internal edge and ending on the cubital 

 vein. Subapical black shade distinct, more so than in C. borealis; the black and yellow spot on 

 the internal angle absent or small. Wings white with black interveuular spots, smaller than 

 usual. Hind wings white, with a distinct discal spot, but a-ith no du si; y patch on the internal angle. 



Underside of fore wings dusky except at the base and on the outer edge. Hind wings with a 

 dittuse discal mark and a dusky diffuse e.^tradiscal shade. End of the abdomen white, and with 

 very long, loose, wooly hairs. 



Expanse of wings, <? -10 mm., 9 42 mm.; length of body, $ IS mm., 9 l.T mm. 



The normal forms of this species are characterized by the usually narrow median band, the 

 three e.xtradiscal scalloped lines, and the small black and yellow spot on the internal angle of 

 the fore wings. 



Var. modesta Hudson (PI. VI, flg. 14) i\$ specimen collected by ]\Irs. Slosson at I^rancoiiia, 

 N. H., had the following characters: The antennic white, with long dark branches. Head in 

 front and above white, on the sides and beneath black; i)alpi black, prothorax or collar cream- 

 white; the thoi'ax behind is dee]) black, with scattered brown scales. Abdomen above smoky 

 brown, white on the sides, at the end, and beneath. 



Fore wings cream-white, becoming slightly butf, brownish on the outer margin. A black dot 

 at the base of the subcostal vein, and extrabasilar line of three dots, one on costa, and a second 

 on the cubital, and a third on the internal vein, the three forming a straight line. On the inner 

 third. Just before the middle of the wing, is a broad steel-blue black, very consi)icuous, band, which 

 is either slightly contracted in the middle or very much so, being hourglass-shape<l, spreading 

 out e(jually on the costa and on the inner edge of the wing, Ijeing narrowest on the cubital vein. 

 At the origin of the third (iiinder) cubital branch is a dark dot from which a faint line goes to the 

 inner edge parallel with the outer side of the black band. A small black discal dot. From a dot 



