122 
MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 
Oeograpliical distribution , — Oroiio, Me. (Mrs. Feriiakl); Platfcsburg, N. Y. (Hiulson); AVest 
F{-rms, N. Y. (Angus); Kuiiawlia Valley, AYest A^irginia (AY. H. Edwards, Mus. Coini). Zool.); 
Ohio (Pilate); Kittery, Me.; New A"ork, Rhode Island, AA^isconsin, Champaign, 111. (French); 
Chicago, 111. (AYestcott); Alauhattan, Kans., moth, Alay 25-Juue 2 (Popenoe); Arkansas (Palm). 
Dataua coutracta Walker. 
(PI. 18, c? ; 19, 9.) 
Vatana contracia Walker, Cat. Lep. Het.Br. Mus., v, p. 1062, 1855. 
Morri.s, Syu. Lep. N. Amer., p. 2-17, 1862. 
Groto and Rob., Proc, Ent. Soc. Phil., vi, p. 14, 1866 j pi. 2, fig. 8, .fig. 6, var. 
Pack., Proc. Ent. Soc. Phil., iii, p. 355, 1864. 
■ Grote, New Check List N. Amer. Moths. i>. 18, 1882. 
Smith. List Lep. Bor. Amer., p. 30, 1891. 
Kirby, Syu. Cat. Lep. Het., i, p. 613, 1892. 
Neum. and Dyar, Trans. Amer. Eut. Soc., xxi, p. 199, 1894; Journ. N. Y. Ent. Soc., ii. p. 116, 1894. 
Larva. 
(PI. XIV, figs. 7, 7rt, 7/^.) 
Angus in Grote and Rob., Proc. Ent. Soc. Phil., vi, p. 14, 1866. (Full-fed larva described.) 
BeutenmiiUer, Can. Eut., xx, p. 134, 1888. (Fourth and last stage described.) 
Packard, Jour. N. A'ork Eut. Soc., i, p.OO, June, 1893. (Full-fed larva described.) 
Moth , — Exterior margin of fore wings entire. Tlioracic patch ocher-yellow shading into 
tawny behind; thorax a little paler than the fore wings, which are bnfl' (R., A', 13); the costal 
shade brighter, more ocherous; the wing rather thickly dusted with brown-black scales, 
concolorous with the pulverulent line and with moderately distinct discal dots. Bordering the 
lines the irrorations are absent for a short space, caii.sing the lines to appear as if bordered with 
obscure pale shades. Frequently lines 1 and 2 are Joined or api)roxiinated on the internal 
margin, though the character is variable. Fringe mars brown (R., Ill, 13), not eoncolorous with 
the lines. Hind wings paler than the fore wings, slightly glossj-, powdered with brown scales most 
thickly toward the outer margin. Below pale, the terminal area of fore wings shaded with 
bright brown. 
Expanse of wings, 40—45 mm. (Dyar.) 
Larva before the last molt — “Head and cervical shield jet-black, shining. Body black, witli 
four equidistant sordid white stripes along each side, being as wide as the intervening spaces, 
except the dorsal space, which is the widest. Body beneath concolorous with the upper side, with 
three longitudinal stripes, and the intervening spaces much broader. On eacli of tbe fourth, lifth, 
tenth, and eleventh segments two reddish brown patches. Thoracic feet and clasf^ers of the 
abdominal legs jet-black, with their bases reddish brown. The body is also sparsely covered 
with sordid white hairs. Length, about 30 mm.'’ (Beutenmiiller.) 
The larvie were sent me by Air. James Angus, and were received September 1. It feeds on 
the walnut, and will eat the ash or rose. 
Full-grown larva. — Tjength, 30 mm. Head large, as broad as the body, entirely black, includin-g 
the montli parts. First thoracic segment with a distinct gamboge-colored transversely oblong 
plate, with three indistinct blackish clouds on it. The body is jet-black, with four continnoiis 
whitish yellow very distinct strifies on each side, and a lifth broken (me between the ba.ses of 
the legs, both thoracic and abdominal. The three np])er stri])es are equidistant, the upper or 
subdorsal one being slightly wider than the others. The fourth stripe is on the lateral ridge, and 
is broader than the others, and wavy. The width of the dorsal black stripe is like that of I) 
perspicua. There is a median ventral whitish yellow stri])e which ends before reaching the anal 
legs. The thoracic legs are black, but gamboge-yellow at the enlarged tieshy base. The middle 
abdominal legs are gamboge-yellow, each with a large external black i)atch above the fdanta. 
The two subdorsal whitish yelloAV lines end before rcacdiing the suranal plate, leaving a black 
space; the idate is also black, and the anal legs are wholly black above and beneath and on the 
sides. The head and body are clothed witli long Avhite hairs, much longer and thicker than in H, 
persxneua mul longer than the body is thick. 
