270 
MEMOIiiS OP THE NATIOl^AL ACADEMY OP SCIEYOES. 
Qeographical distributiou. — Oroiio and ]Mouut Desert, Me. (i[rs. Pcriiald); Brunswick, Me. 
(Packard); Massachusetts (Harris); Pranconia, H., common {Mis. Slossou); eastern Kew 
York (Liutner, Edwards, Dyar); Plattsburg, PI. Y. (G-. H. Hudson); Canada, Maine, New York, 
Pennsylvania, Wisconsin, Illinois, Texas (French); Pennsylvania, Wisconsin, and Montreal, 
Canada (Liutner); thus far not known to occur bejmnd the limits of the Appalachian subproviuce. 
Cerura scolopendiina Boisduval. 
(PI. VI, figs. 13, U.) 
Phalwna furcula Abbot aud Smith, Lep. Ins. Georgia, 1797. 
Dierauura hcolopendritta Boisd., Li^p. de la Oal., p. 8G, 1869. 
Cerura aquilovariH Lint., Ent. Contr,, iv, p. 85, June, 1878. 
Harpyia albicoma Streck., Proc. Acad. Nat. Sci. Phil, for 1884, p. 284, Jan., 1885. 
Ce7’ii7'a bicuspid Butler, Auu. Mag. Nat. Hist., viii, p. 31, Oct. 7, 1881. 
Smith, Lhst. Eep. Bor. Amer,, p. 31, 1891. 
Cerura scolope^idrina Dyar, Cau. Eut., xxiii, p. 186, Sopt., 1891. 
Cerura acpiUonarls Groto, New Check List N. Anier. .Motlis, p. 20, 1882. 
Cerura modesfa Hudson, Cnn. Eut., xxiii, p. 197, »Soi)t., 1891. 
Cerura scolope^idriva Kirby, Cat. Lep. Ilet., i, ]►. 588, 1892. 
Cerura aquilonavis Kirby, Syn. Cat. Lep. Hot., i, p. 588, 1892. 
Cerura scolopendrina Nemn. and Dyar, Traus. Amer. Eut. Soo., xxi, p. 189, 1894; Journ. N. Y. Ent. Soc., ii, 
p, 114, 1894.' 
Larva. 
Thaxter, Cau. Eut., xxiii, p. 34, Feb., 1891. (Food plant 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 6 , three $ . Body as in (7. horeallSy hut the end of the abdomen is white, with 
longer hairs. Fore wings with the lucdiau dark band moderately broad, usually straight on the 
insidey and irregulaVy scullopedy on the outsidey and interruxitedly edged with oclier-yellow; 
extrabasilar line Avitb four black dots forming a straight line, straighfcer than in C, horealis. Discal 
mark small, three extradiscal faint darh 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. Snbapical black shade distinct, more so than in C. horealis; the black and yellow spot on 
the internal angle absent or small. Wings white with black iutervennlar spots, smaller than 
usual. Hind wings white, with a distinct discal spot, but tvith no dusky patch on the internal angle. 
Underside of fore wings dusky except at the base and ou the outer edge. Hind wings with a 
dilfiisc discal mark and a dusky diffuse extracliscal shade. End of the abdomen white, and with 
very long, loose, wooly hairs. 
Expanse of wings, S 40 mm., $ 42 min.; length of body, ^ 18 mm., ? 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. YI, fig. 14) a 6 specimen collected by Mrs. Slossoii at Franconia, 
N. H., had the following characters; The anteume white, with long dark branches. Head in 
front and above white, on the sides and beneath black; iialpi black, prothorax or collar cream- 
white; the thorax behind is deep black, with scattered brown scales. Abdomen above smoky 
brown, white ou 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, aud extrabasilar line of three dots, one on costa, aud a second 
on the cubital, and a third ou the internal vein, the three forming a straight line, Ou the inner 
thinl, just before the middle of the wing, is a broad .steel-blue black, very conspicuous, baud, wliich 
is either slightly contracted in the middle or very much so, being hourglass-shaped, spreading 
out equally ou the costa and ou the inner edge of the wing, being narrowest on tlie 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 
