MEMOIRS OF THE XATIO^'AL ACADEMY OF SCIENCES. 
217 
Loiulou, Canada (Saiuulers); Quebec (Fyles); Bruiis^\'ick, Me., commou (Packard); Boston,. 
Mass. (Sanborn, Harris); Amherst, Mass. (Mrs. Feriiald); Newburg, N, Y, (Miss Morton); 
Plattsburg, N. Y. (Hudson); New York (Doll); Brooklyn, Long Island (Hulst); Providence, R, I. 
(Clark, Bridgliam, Packard); Janesville, Md. (M. C. Z.); southern Illinois (French); Missouri 
(Miss Soule); ^ranhattan, Kans., ^‘common on ai)ple’^ (Popenoe); Aumsville, Oreg. (Matteson Jide 
Riley) ; Kansas, ^Missouri, Idaho, California, Oregon, Iowa, New York, District of Columbia, and 
Yirginia, Coeur d’Alene City, Idaho, August 29 (U. S. Nat. Mus.); saliciSy Mount Shasta (H. 
Edwards), and Yosemite Valley (Dyar): Normal form. Florida (Palm); Canada, Kittery (Me.); 
Massachusetts, New York, Maryland, North Carolina, Georgia (French); var. sallcis California 
(French). 
Seirodonta Grote and Kobinson. 
(PI. XLV; figs. 1, Irt, and venation. PI. XLVIII, fig. 10, palpus.) 
Cecritaf (in part) Pack., Proc. Eut. Soc. Phil., iii, p. 359, Nov., 1864. 
Heterocampa (in part) Walk., Cat. Lep. Piet. Brit. Mus., Part xxxiii, p. 419, 1865. 
Edema (in part) Walk., Cat. Twop. PTet. Brit. Mus., l^art xxxii, p. 426, 1865. 
Seirodonta Grote and Rob. (inedited), List. Lep. N. Amer., p. xi, Sept., 1868. 
Grote, Now Check List N. Amer. Moths, p. 19, 1882. 
Smith, List Lep. Bor. Amor., p. 30, 1891. 
Kirby, Syn. Cat. Lep. Het., i, pp. 569, 929, 1892. 
Ccmfa, in part, Neum. and P)yar, Trans. Amor. Pint. Soc., xxi, p. 206, June, 1894; Joiirn. N. Y, Ent. Soc.,ii,p.. 
117, Sept., 1894. 
Moth . — ^ and $ . Head prominent, not quite as large as in Heterocampa; vertex broad,, 
triangular, with a Battened tuft in front of each antenna. Clypeus square, fall in the middle, and 
toward the vertex a median elevation. Anteume of S piectinated three-fourths to the tip, as in 
Heterocampa ; in 9 simple, with a few ciliated scales beneath. Maxilhe well developed, twice aslong 
as the head, united and coiled up, Ihilpi p)orrect, extending well beyond the front; second joint 
rather narrow and long, with a few spreading scales below; third joint of moderate size, rather 
short, distinct, conical. Thorax not tufted, but the ])rothorax with long dense hairs beneath. Fore 
wings not quite half as broad aslong; costa slightly convex at the base and apex, straight between,, 
not bent at the apex; outer edge oblique, not angulated, but little shorter than the internal edge. 
Venation : A long narrow subcostal cell, much as in Heterocampa (II. manteo), and the vena- 
tion otherwise scarcely differs from that of H. manteo, except that the discal veins make a regular 
curved line. In the hind wings the costa is full near the base, more so than the species of 
Heterocampa; apex a little more pointed than in II. manteo; the outer edge slightly bent in the 
middle, while the costal vein is shorter, ending much nearer the middle of the costa than in 
Heterocampa, Legs rather long, with only a single pair of tibia! spurs, the outer one being twice, 
as long as the inner. 
The genus differs from Heterocampa chiefly in the venation, the discal venules forming a line 
much curved in. I confess that these characters seem to me quite trivial, especially when we take 
into account the very close similainty of the larva to that of II. majitco and the great difficulty of 
distinguishing one from the other. I had concluded to unite it with the Reterocamiya, but regard 
it provisionally as a distinct genus. The style of markings is not as we find it in Heterocampa,. 
there being two definite lines on the fore wings, arranged, however, much as in II. manteo. 
To place this species in the genus Cecrita, close by giittimtta and hhmdata, is scarcely allow- 
able, since the larvm seem to differ so much, though the earliest stages of hilineata have yet to be 
observed. 
Larva . — Body cylindrical, head smooth, rounded, no wider than the body, which is marked 
almost precisely as in Heterocampa manteo, with two pale subdorsal lines, which diverge on the 
prothoracic segment, are close together on the second and third thoracic segments, and again 
widely separate from the front edge of the first abdominal segment to the end of the body; some- 
times the space between is reddish and extends down on the sides of the third and sixth segments. 
A yellow or white spiracuhir line. A pair of s*uall dorsal ihliferons tubercles on the first and 
eighth abdominal segments; the other minute, much reduced. Anal legs long and slender. 
Geographical distribution . — The single species known is confined to the Appalachian sub- 
province, but since it occurs at Franconia, N. H., may be found in the Hudsonian fauna. 
