MEMOlllS OF THE NATIONAL ACADEMY OF SCIENCES. 24& 



Heterocampa umbrata Walker. 



(PI. V, tigs. 10,13 c?, 14 9.) 



Helci-cicainpa umbrata AValk., Cat. Lep. Het. Br. Mus., v, p. 1023, 1855. 



Iletcrocampu piilverea Groto mid Koli., Trans. Ainer. Eut. Soc, i, p. 18.5, .\ug, 1807, I'l. IV, ih'. 32 9 . 

 Grote. Xew Check List N. Amer. Moth.s, p. lit, 1882. 

 Smith, List. Lep. Bor. Amer., p. 31, 18!)!. 

 Kirby, Syu. Cat. Lep. Het., i, pp. 563, 564, 181)2. 

 Hclirocaiiipa athcno Doiibleday, Harris Corr., ]>. 1.34, 1869. 



HctiriH'ampa iimhnila Neiim. uud Dyar. Traus. Amer. Kut. Soc-., x.vi, p. 20.5, ISItl ; .louru. X. V. lOut. Soc., ii, p. 117 ' 

 Sep., 1894. 



Larva. 



(PI. XXXIII, tig. 8, 8a.) 



French, Can. Ent., xii, p. 83, April, 1880 (last larval stage described) ; Sixth Ann. Keji. S. 111. Xormal Univ., p. 



44, 1880. 

 Packard, Fifth Rep. U. S. Eut. Comm. on Forest Insects, p. 1.50, 1890 (copied from French).' (The larva 



referred to in Proc. Bost. Soc. X'at. Hist., xxiv, j). 518, i.s not that species.) 



ilotlt. — One S , two 9 . Head, thoia.x, aitd fore wiujis pale a.sli, with a slight \y,\]e olive-greeu 

 tiiit. Palpi slender, short, bhiL-k. Piothoiax or "collar" with two slightlj' marked parallel lines 

 crossiug- It. Teguhe with white scales in the middle, while the edges and ends are bordered with 

 white aud black scales. Thorax behind with a blackish patch, succeeded on the abdomen by 

 seven dusky short basal tufts, brownish in S , of which the first one is very large, the others small, 

 the fourth one larger than the others, except the basal one. 



P^ore wings pale ash-gray, with a pale olive-green tint, a basal double black scalloped line at 

 the insertion of the wing, not reaching the iuterutil edge, which is white. On the basal fourth of 

 the wing is a black scalloped line, f(jllowed by a broad, clear oliveash space. Discal mark a curved, 

 narrow (distinct in <? , in 9 not very distinct) line continued behind, i. e., on the cubital vein by a 

 distinct, broad, black shade containing three parallel narrow black lines (wanting in the S 1 have 

 seen); this shade is much as in i/. oi//(/»rt and curves outward, filling the second cubital space, 

 the outer end becoming a part of the subinarginal 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, aud dislocated on the first cubital vein, the scallops 

 being heavy, wide, and black. (In the S I have seen these scallops are disconnected and lighter in 

 hue, as well as narrower). 



The edge of the wing is clear greenish ash. The fringe is of the same color, with black 

 venular streaks. Costa with three linear black subapical marks. 



Hind wings alike in both sexes, with a distinct sinuous diffuse whitish band on the outer 

 third, this being the only species in the genus in which this line is present, and in this respect 

 strongly recalls H. marthesia. Beyond this line the wing is smoky, the fringe white, dusky at th& 

 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 in each 

 wing. Fringe as above. 



Expanse of the- wings, $ 45 mm., 9 4.3 mm.; length of body, $ 20 mm., 9 19 mm. 



M. pidverea is readily recognized by the lack of the subapical oblique white shade, so distinct 

 in H. obliqud, by the heavy black scalloped line which is broken on the first median vein, by the 

 pale greenish tint of the thorax aud fore wings, and by the unusual whitish sinuous line on 

 the hind wings. 



My specimen, which agrees with Orote and Ilobinson"s description and figures, also agrees 

 with a type specimen in the American Museum iu New York, and such a specimen labeled in 

 Mr. Grote's handwriting iu the collection of Mrs. Bridgham in New Y'ork. 



'The description of the moth docs not apply to piilrerea, bnt wag drawn np from B. guttivitta by error. The 

 references on ]ip. 328. 492, aud 649 .are erroneons. Mr. Dyar writes that he believes Walker's H. umbrata and H. 

 seniiphiya are two earlier names for this .species. 



