122 MEMOIRS OF THE XATIOXAL ACxVDEMY OF SCIEifCES. 



Geographivnl disfribiitiint. — Oiono, Mo. (Mrs. Fernald); Plattsburg, N. Y. (Hudson); West 

 Fiirmi?, ]Sr. Y. (Angus); Kanawlia Valley, West Virginia (W. H. Edwards, Mus. Conip. ZooL); 

 Ohio (Pilate); Kittery, Me.; New York, Rhode Island, 'Wisconsin, Champaign, 111. (French); 

 Chicago, 111. (Westcott); Manhattan, Kans., moth, May 25-Juue 2 (Popcnoe); Arkansas (Palm). 



Datana contracta Walker. 

 (PL 11, tig. 18. ^ ; 19, J,) 



Datana contracta Walker, Cat. Lap. Het. Br. Mus., v. ]). 1002, 185.5. 

 Morris, Syn. Lep. N. Amer., p. 217, 1862. 



Grote and Rol>., Proc. Ent. Soc. Phil., vi, p. U, 1866; pi. 2, fig. 8, fig. 6, var. 

 Pack., Proc. Ent. Soc. Phil., iii, p. 355. 1864. 

 Grote, New Check List N. Amer. Moths, p. 18, 1882. 

 Smith, List Lep. Bor. Amer.. p. 30, 1891. 

 Kirby, Syn. Cat. Lep. Het., i, p. 613. 1892. 

 Neiim. and Dyar,TraDs. Amer. Eut. .Soc, xxi, p. 199, 1894; Joiiru. N. Y. Ent. Soc, ii, p. 116. 1894. 



Larva. 

 (PI. XIV, figs. 7, la.'h.) 



Angus in Grote anil Rob., Proc. Ent. Soc. Phil., vi, p. 14, 1860. ^FuU-fed larva described.) 

 Beutenmi'dter, Can. Eut., xx, p. 134, 1888. (Fourth and last stage descrilied.) 

 I'ackaril, Jour. X.York Eut. Soc, i, p. 60, June, 1893. (Full-fed larva described.) 



Moth. — Exterior margin of fore wings entire. Thoracic patch ocher-yellow shading into 

 tawny behind; thorax a little paler than the fore wings, which are buff" (R., V, 13); the costal 

 shade brighter, more ocherous; the wing rather thieldy dusted with brown-black scales, 

 ciincolorous with the pulverulent line and with moderately distinct discal dots. Bordering the 

 lines the irrorations are absent for a short space, causing the lines to appear as if bordered with 

 obscure pale shades. Fre(pieiitly lines 1 and 2 are joined or approximated o)i the internal 

 margin, though the character is variable. Fringe mars l)rown (R., Ill, 1.'^), not coiicoloious with 

 the lines. Hind wings paler than the fore wings, slightly glossy, powdered with l)rowii scales most 

 thickly toward the outer margin. Below pale, the terminal area of lore wings shaded with 

 bright brown. 



Expanse of wings, 40-45 mm. (Dyar.) 



Larva he/ore the last molt. — "Head and cervical shield jet-black, shining. Body black, with 

 four equidistant sordid white stripes along each side, being as wide as the intervening spaces, 

 except the dorsal sjiace, which is the widest. Body beneath concolorous,with the upper side, with 

 tliree longitudinal stripes, and the intervening spaces much broader. On each of the fourth, lifth, 

 tenth, and eleventh segments two reddish brown jiatches. Thoracic feet and claspers of the 

 abdominal legs jet-black, Avith their bases reddish brown. Tlie body is also sparsely covered 

 with sordid white hairs. Length, about 30 mm."' (Beutenmiiller.) 



The larvae were sent me by Mr. James Angus, and were received .September 1. It feeds on 

 the walnut, and will eat the ash or rose. 



FuU-f/rown larra. — Length, 30 mm. Head large, as broad as the body, entirely black, includm-g 

 the mouth parts. First thoracic segment with a distinct gamboge^colored transversely oblong 

 jilate, with three indistinct blackish clouds on it. The body is jet-black, with four continuous 

 whitish yellow very distinct stripes on each side, and a fifth broken one between the bases of 

 the legs, both thoracic and abdominal. The three upper stripes are equidistant, the npjier or 

 subdorsal one being slightly wider than the others. TIm? 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 /> 

 perspicua. There is a median ventral whitish yellow stripe which ends befoi-e reaching the anal 

 legs. The thoracic legs are black, but gamboge-yellow at the enlarged fleshy base. The middle 

 abdominal legs are gamboge-yellow, each with a large external black patch above the planta. 

 The two subdorsal whitish yellow lines end before reaching the suranal plate, leaving a black 

 space; the plate is also black, and the anal legs are wholly black above and beneath and on the 

 sides. The head and body are clothed with long white hairs, much longer and thicker than in I), 

 perspioua and longer than the body is thick. 



