:218 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Seirodonta bilineata (Packaril). 

 (IM.VI. Fig.8<J.) 



Cecrila? bilineata Pack., Proc. Ent. Soc. Phil., iii, p. 359, 1864. 



Seirodonia biliiieala Grote and Rob. (Inediti-il. Groto in letter.) 



Heterocampa titrbida Walk.. Cat. Lep. Het. Brit. Mns., xxxii, p. 419, 1865 {fide Grote and Rol).). 



NotodoHta {Gluphixiii ') uhni Harris, Knt. Corresp., p. 302, 18GSI. 



Edema? aaaocialn Walk.. Cat. Lep. Hct. Brit. Mils., xxxii. p. 426, 1865 (fide Grote and Kob. ). 



Seirodonta bilineata Groto, New Clieck List N. Amer. Moths, p. 19, 1882. 



Pack., Filth Kep. U. S. Ent. Connn. on Forest Insects, p. 2lit<. lf<9n. 



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



Kirby. .Syu. Cat. Lep. Het.. i. p. .509, 1892. 

 Cecrila bilineata Xenni. and Dyar, Trans. Amer. Ent. 8oc., xxi. ]). 207, ,Iuue, 1894; .lonrn, N, Y. Ent. .Soc , ii, 

 p. 117, Sept., 1894. 



Larva. 



(PI. XXIX, figs. 1, 1». PI. XXXV, n.iis. 1, l«-lc; 2, 3.) 



Harris. Ent. Corresp., p. 301 (PI. II. tigs. 2, 31, 1869. (Scarcely recognizable colored figures of larva.) 

 French, Can. Ent., xviii, p. 49, March, 1886. (Mature larva described.) 



Packard, Fifth Rep. U. S. Ent. Comm. ou Forest Insects, p. 268. (Uncolored figure. PI. XXXII. tig. 4. Desc. 

 ex Harris. 



3Ioth. — Two <? , two S . Body aud wings nuifbiinly mouse-colored. Tipper side of tlie palpi 

 and end of the patagia dark. 



Fore wings crossed by two distinct, dark brown, scalloped lines edged with gray, the inner 

 -situated on the basal third of the wing and tlio onter forming the usual extradiscal line, tlic two 

 approaching each other on the submedian fold.' The inner line is bent inward near the internal 

 edge of the wing on the internal vein (VI), then curved outward between this vein and the sub- 

 costal vein. The outer line is bent outward on the internal vein and carved inward on the 

 submedian fold, aud thence by a series of scallops ends, after making a great curve on the outer 

 fourth of the costa. The space between the two lines is slightly darker than the rest of the wing. 

 A linear black, not very distinct, discal mark. Toward the apex are four dark costal marks. 

 A verj' faint sabmargiiial line. 



Hind wings aud abdomen a little paler tluiu the tliora.x and fore wings; a dusky patch near 

 the internal angle. Underside of the wings uniformly mouse-colored and eoncolorous with the 

 upper side of the hind wings. 



Expanse of wings, S 40 mm., 2 35-40 mm. ; length of body, S 15 mm., 9 15-17 mm. 



This plain, quakerish-in garb species maybe known by its uniform shining mouse tint and the 

 two narrow distinct curved and scalloped dark lines which cross the fore wings, and by the pale 

 mouse-colored hind wings. 



Young aud older itulividuals feeding on the elm were kindly sent me by Mr. Tallant, from Ohio, 

 and were received July 10. A fully fed one (not mentioned, however, in the following description)' 

 was found under an elm at Bath, Me., in August. 



Larva, Stage II. — "Head slightly bilobed, narrowed sibove, median suture deep; shining 

 brownish black, the clypeus pale; width, 0.9 mm. Body with anal legs elevated, a little enlarged 

 dorsally on abdominal scgiiuMits 1 and 8. Where the largo black tubercles of row i arc uniform 

 light green a yellowish subdorsal line faintly seen; anal legs reddish. Two dorsal inirple brown 

 patches (in this individual) on segments 2-5 and 10-12, respectively, incised or almost broken at the 

 intersegmental furrows. Sette rather coarse, blackish, single from normal eoncolorous tubercles. 

 Legs all i)ale. Length at end of stage about 9 mm. Calculated series of widths of head in 5 

 stages: I, .02; II, .95; III, 1.44; IV. 2.18; V, .■}..■?." (Dyar MS.) 



Larva, Stage III {?). — Length, 10 mm. The head is much broader than the body, the front 

 broail and flat, jialc yellowish green, with long darlc hairs, and on each side a curved black-brown 

 line, not edged with white. The body is pale straw or lemon j'ellow, the sides below more greenish, 

 •with red specks and short curved lines in front, there being very few behind the first abdominal 

 segment. The dorsal briek-red stripe is arranged as follows: On the prothoracic segment are 



' This fold is the vestige of Vein V. 



