;218 
MEMOIRS OF THE RATIONAL ACADEMY OF SCIENCES. 
Seirodonta bilineata (Packard). 
(PI. VI, Fig. 8^.) 
Cecritaf hilineata Pack., Proc. Eut. Soc. Phil., iii, p. 359, 1864. 
Seirodonta 'bilineata Grote and Rob. (lueditcd. Groto in letter.) 
Ueterocampa iurhida "Walk., Cat. Lep. Het. Brit. Mus., xxxii, p. 419, 1865 (fide Groto and Rob.). 
^otodonta (GlupItUin ?) uhni Harris, Kut. Corresp., p. 302, 1869. 
Ji^dema f associata Walk., Cat. Lep. Het. Brit. Mus., xxxii, p. 426, 1865 (fide Grote and Rob.). 
Seirodonta bUhieata Grote, Jvew Check List N. Amer. Moths, p. 19, 1882. 
Pack., Fifth Rep. U. S. Eut. Comm, on Forest Insects, p. 268, 1890. 
Smith, List Lep. Bor. Amer., p. 30, 1891. 
Kirby, Syu. Cat. Lop. Het., i, p. 569, 1892. 
Cec7'iia bilineata Neum. and Lyar, Trans. Amer. Eut. Soc,, xxi, p. 207, June, 1894; Journ. N. Y, Ent. Soc., ii, 
p. 117, Sept., 1894. 
Larva. 
(PI. XXIX, figs. 1, Iff. PI. XXXV, figs. 1, la-lc; 2, 3.) 
Harris, Ent. Corresp., p. 301 (PI. II, figs. 2, 3\ 1869. (Scarcely recognizable colored figures of larva.) 
FreucA, Can. Ent., xviii, p. 49, March, 1886. (Mature larva described.) 
Packard, Fifth Rep. XT. S. Ent. Comm, ou Forest Insects, p. 268. (Uncolored figure, PI. XXXII, fig. 4. Lesc. 
ex Harris. 
Moth , — Two $ , two 9 . Body aud wings uniformly mouse-colored. Upper side of the palpi 
:aud end of the patagia dark. 
Fore wings crossed by two distinct, dark brown, scalloped lines edged with gray, the inner 
situated ou the basal third of the iving aud the outer forming the usual extradiscal line, the two 
approaching each other on the submedian fold.^ The inner line is bent inward near the internal 
edge of the wing ou 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 curved inward on tlie 
submedian fold, and 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 very faint submarginal line. 
Hind wings and abdomen a little paler than the thorax and fore wings; a dusky patch near 
the internal angle. Underside of the wings uniformly mouse-colored and concolorous with the 
upper side of the hind wings. 
Expanse of wings, 5 40 mm,, 9 35-40 mm.; length of body, S 15 mm., 9 15-17 mm. 
This plain, quakerish-in-garb species may be known by its uniform shining mouse tint and the 
two narrow distinct curved and sca]lo])ed dark lines which cross the fore wings, and by the pale 
mouse-colored hind wings. 
Young and older individuals 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 IT . — “Head slightly bilobed, narrowed above, median suture deep; shining 
brownish black, tlie clypeus pale; width, 0.9 mm. Body with anal legs elevated, a little enlarged 
dorsally on abdominal segments 1 and 8. Where the large black tubercles of row i are uniform 
light green a yellowish subdorsal line faiutly seen; anal legs reddish. Two dorsal purple-brown 
patches (in this individual) on segments 2-5 and 10-12, rcvspectively, incised or almost broken at the 
intersegmental furrows, Setm rather coarse, blackish, single from noi’inal concolorous tubercles. 
Legs all pale. 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, 3.3.” (Dyar MS.) 
Larva, Stage III {?). — Length, 10 mm. The head is much broader than the body, the front 
broad and flat, pale yellowish green, with long dark hairs, and on each side a curved black-brown 
line, not edged Avitli white. The body is pale straw or lemon yellow, the sides below more greenish, 
with red specks and short curved lines in front, there being very few behind the first abdominal 
;segmeut. The dorsal brick-red stripe is arranged as follows: On the iirothoi'acic segment are 
1 This fold is the vestige of Vein V. 
