MEMOIKS OF THE ]S"ATIONAL ACADEMY OF SCIENCES. 
249 ' 
Heterocampa umbrata Walker. 
(PI. V, figs. 10,13 ^,U 9.) 
Heterocampa nmhraia Walk., Cat. Lep. Het. Br. Jlus., v, p. 1023, 1855. 
Heterocampa pnlrerea Grote ami Rob., Trans. Amer. Knt. Soc., i, p. 185, Aug, 1867, PI. IV, fig. 32 9 . 
Grote, New Check List N. Aiuer. Moths, p. 19, 1882. 
Smith, List. Lep. Bor. Amer., ]». 31, 1801. 
Kirby, Syu. Cut. Leii. Hot., i, ji]!. 563, 564, 1892. 
Heterocampa alhcrco Doublefiay, Harris Corr., ]>. 131, 1869. 
Heterocampa »mi>ra^aNeiuu. umlByar, Trans. Amer. Eut. Soc., xxi, p. 205, 1894; Journ. K. Y. Ent. Soc., ii, p. 117, 
Sep., 1894. 
Larva. 
(Pl.XXXm,fig.8,8a.) 
French, Can. Ent., xii, p. 83, April, 1880 (last larval stage described) ; Sixth Ann. Rep. S. 111. Normal ITniv., p.. 
44, 1880. 
PacA:«7*f?, Fifth Rep. U. S. Ent. Comm, on Forest Insects, p. 159, 1890 (copied from French).’ (The larva 
referred to in Proc. Bost. Soc. Nat. Hist., xxiv, p. 548, is not that species.) 
— One ^ , two 9 . Head, thorax, and fore wings pale ash, with a slight jiale olive-green 
tint. Palpi slender, short, black. Profcliorax or “collar^’ with two slightly marked parallel lines 
crossing it. Teguhe with white scales in the middle, while the edges and ends are bordered with 
white and black scales. Thorax behind with a blackish patch, succeeded on the abdomen by 
seven dusky short basal tufts, browuisli in 5 , of which the first one is very large, the others small, 
the fourth one larger than the others, except the basal one. 
Fore wings pale ash-gray, witli a pale olive-greeu tint, a basal double black scalloped line at 
the insertion of the wing, not reaching the internal edge, wliicli is white. On the basal fourth of 
the wing is a black scalloped line, followed by a broad, clear olive ash space. Discal mark a curved, 
narrow (distinct in 6 , in 9 not very distinct) lino continued behind, i. e., on the cubital vein by a 
distinct, broad, black shade containing three iiarallel uarrow black lines (wanting in the 6 I have 
seen); this shade is much as in i/. obliqua and curves outward, filling the second cubital space, 
the outer end becoming a part of the submarginal line. A large semielliptical or pear-shaped, clear, 
almost whitish, ash area beyond the discal mark, and traversed by a faint double scalloped dark 
line, the extradiscal, which entirely crosses the wing. The characteristic mark in 9 is the black, 
distinct, scalloped, broken, submarginal band, which is nearly obsolete on the costa and on the 
internal edge, but broad and heavy between, and dislocated on the first cubital vein, the scallops 
being heavy, wide, and black. (lu the $ I have seen these scallops are disconnected and lighter iu 
hue, as well as narrower). 
Tlieedge'of the wing is clear greenish ash. The fringe is of the same color, with black 
veuular streaks. Costa with three linear black subapical murks. 
Hind wings alike iu both sexes, with a distinct sinuous diffuse whitish baud on the outer 
third, this beiug the only species iu the genus in which this line is present, and iu this respect 
strongly recalls JL murthesia. Beyond this line the wing is smoky, the fringe white, dusky at the- 
base, where is a black scalloped line. A dark spot at the internal angle. 
Underside of the wings whitish, the dusky submarginal shade reproduced beneath iu each 
wiug. Fringe as above. 
Expanse of the wings, S 45 mm., 9 45 mm.; length of body, S 20 mm., 9 19 mm, 
II, pulverea is readily recognized by the lack of the subapical oblique white shade, so distinct 
in IL obliqua^ by the heavy black scalloped line Avhich is broken on the first median vein, hy the 
pale greenish tint of the thorax and fore Avings, and by the unusual Avhitish sinuous line on 
the hind wings. 
j\Iy specimen, which agrees Avith Grote and Kobinson’s description and figures, also agrees 
Avith a type specimen in the American Museum iu Ncav York, and such a specimen labeled iu 
Mr. Grote’s haiulAvriting iu the collection of Mrs. Bridgham in New York. 
’The descriptiou of the niotli docs not apply topw/rcrefl, hut was drawn up from H. guttivitia by error. The- 
references on j)]). 328. 492, and 649 are erroneous. Mr. Dyar writes that he believes AAhilker’s H. umbrata and H, 
iseniiplaga are two earlier names for this species. 
