270 MEMOIKS OF THE NATIONAL ACADEMY OF SCIEXCES. 



Geo(jraphkal distribution. — Oroiio ami Mount Desert, Me. (Mrs. Fernald); Brunswick, Me. 

 (Packard); Massachusetts (Harris); Fraucouia, N. H., common (Mrs. Slossou); eastern New 

 York (Liutuer, Edwards, Dyar) ; Plattsburf-', N. Y. (G. H. Hudson) ; Canada, :\Iaine, New York, 

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

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



Ceruia scolopendrina Boisdaval. 



(I'l. VI, tigs. 13, 14.) ■ ■ 



PhaUi'tia fiircnla Ahhot and Smith, Lep. Ins. Georgia, 1797. 



Vicraniira scolopendrivii Boisd., Liip. <le la Cal., p. 86, 18G9. 



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



Harpi/ia ulbicoma Strecls., Proc. Acad. Nat. Sci. Phil, for 1884, p. 284, .T:iu., 1885. 



Centra bicuspis Butlfr, Ann. Mag. Nat. Hist., viii, p. 31, Oct. 7, 1881. 



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

 Cirura scolopendrina Dyar, Can. Ent., xxiii, p. 180, Sept., 1891. 

 Cernra aquUonaris Grote, New C'heclj: List N. Amer. Moths, p. 20, 1882. 

 Cerura modesia Hudson, Can. Ent., xxiii, p. 197, Sept., 1891. 

 Centra scolopendrina Kirby, Cat. Lexi. Het., i, p. 588, 1892. 

 Centra aquUonaris Kirhy, Syu. Cat. Lep. Het., i, p. 588, 1892. 



CeTHra scoiojjendn'iirt Nenm. and Dyar, Trans. Amer. Eut. Soc. xxi. ]>. 189, 1894; Journ. X. Y. Ent. Soc, ii, 

 p. 114, 1894." 



Larva. 



Thaxter, Can. Ent., xxiii, p. 34, Feb., 1891. (Food jilaut only mentioned.) 



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

 nut being bred. ) 



3Ioth. — Nine S , three 9 . Body as in C. hDrealis, but the end of the abdomen is white, with 

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

 inside, and irregular, scalloped, on the outside, and interruptedly edged with ocher-yellow; 

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

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

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

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

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

 usual. Hind wings wbite, with a distinct discal spot, but with no dusky patch on the internal angle. 



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

 diffuse discal mark and a dusky diffuse extradiscal shade. End of the abdomen white, and with 

 very long, loose, wooly hairs. 



Expanse of wings, $ 40 mm., 9 4'J mm.; length of body, S IS mm., 9 15 mm. 



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

 three extradiscal scalloped lines, and the small black and yellow spot on the internal angle of 

 the fore wings. 



Var. modesta Hudson (PI. VI, fig. 14) a S specimen collected by Mrs. Slosson at Fraucouia, 

 N. II., had the following characters: The anteun;e white, with long dark branches. Head in 

 front and above white, on the sides and beneath black; palpi black, x)rothorax or collar cream- 

 white; the thorax behind is deep black, with scattered brown scales. Abdomen above smoky- 

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



Fore wings cream-white, becoming slightly buff, 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 consjiicuous, band, which 

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

 out equally on the costa and on the inner edge of the wing, being narrowest on the cubital vein. 

 At the origin of the third (hinder) 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 



