242 
MEMOIllS OF THE NATIONAL ACADEMY OF SCIENCES. 
Heterocampa obliqua Packard. 
(PI. V, ligs. 7^, 8^, 95 .) 
Heierocavipa raria "Walk., Cat. Lep. Hot. Hrit. Mus., p. 1023, 1855. 
Heterocampa ohUq^\ta Park,, Prnc. Ent. Soc. Phil., iii, p. 308, 1861. 
Heterocampa irouveJotii Pack., Eut. Soc. Phil., iii, p. 369, 1864. 
Heterocampa ohliqua Groto ami Koh., Trans. Amer. Ent. Soc,, i, p. 178, 1867, Pk IV, figs. 26^ , 27 9 . 
Heterocampa brunnea Groto and Kob., Trans. Amor. Eut. Soc., i, p. 180, 1867, PI. IV, fig. 28 9. 
Heterocampa obliqua Grote, New Check List Lep. N. Amer., p. 19, 1882. 
Smith, List Lep. 15or. Amer., p. 31, 1882. 
Kirby, Syu. Cat. Lep. Hot., i, i>. 563, 1892. 
Dyar, Ent, News, i\', p. 33, Jan., 1893. 
Neum. and Dyar, Trans. Amer. Ent. 80 c., xxi, p. 205, June, 1894; Journ. N. Y.. 
Ent. Soc., ii, p. 117, Sept., 1894. 
Larva. 
(PI. XXX, fig. 1, Irt, 1&, Ic, 2, 2a, 21), 2c.) 
Fachard, Jouru. N. Y. Ent. Soc., iii, p. 27, March, 1895. (All stages. Pigs, of Stages I, II, with spines of-ff... 
guttivitta, stage I.) 
^[oth , — Two <5 , two 9 . Dark brown, with darker streaks and lines^ margined with reddish 
a large oblique costo-apical white patch. 
Head, pectoral tuft, and thorax cinereous, except the black edges of the patagia and the 
posterior margin of the thorax. 
Fore wings of a uniform dark aslten brown; the basal half of the wing is crossed by three 
interrupted lines, composed of liuear, black, slightly curved lines or hinules, margined on both 
sides with ferruginous ashen. The lirst or basal line is straight, and reaches only to the base of 
the internal angle, which is black. The middle line is double, composed of two parallel liuear 
sinuate lines which become obsolete on the costa, is curved outward on the median vein much 
more than in JI, astarte, and is obsolete on the internal edge. The third line is single and consists 
of the curvilinear black discal mark and a second curvilinear line below the fourth median venule. 
On the costa it is represented by two parallel brown lines, inclosing a white spot. Outside and 
];)arallel to the discal curvilinear mark is a line composed of two carved lunules, which are 
geminate, and inclose a reddish brown line. From the upper line extends toward the apex a 
very distinct white patch dusted over with ochcrous scales. On its outer edge are three black 
iuterveuular streaks, bathed with ferruginous scales. In the middle of the wing and just below 
is a round rusty patch. Below the median vein and its brauches the Aviiig is lighter, and, like 
the costa, covered with cinereous and dark ocherous scales. 
Hind wings ill 5 pearly white, base of the fringe dark; a dark discoloration on the internal 
angle; costa dark, in the 9 the hind wings are dusky white at base, becoming quite dark grayish 
brown toward the outer edge. 
Underside of the fore wings dark, except in the middle region, which is. very pale. Whiter 
and dark marks on the costal edge, and the costo-apical white patch appears through from above,. 
Hind wings white, the fringe discolored on the venules. 
Expanse of wings, ^ 43 mm,, 9 48-03 mm. ; length of body, 6 23 mm., 9 20-23 mm. 
This species differs from IJ. astarte in the uuiforiu dark ash-brown hue of the fore wings, 
there being in the usual normal form no olive.greeu scales intermixed, but rather a tendency to 
reddish brown, as seen in var. hrmnea; also in the larger oblique white subapical ])atcb, the 
oblique black shade bordering it externally being broader, more diffuse than iu JL antarte, and 
containing short iuterveuular black slashes, and this band is iu JL obliqua continued to the internal 
edge of the wing, where is a white lunule; also iu the first median spaces is a distinct round or 
oval white spot. The inner doubly scalloped line is much curved outward iu the discal space,, 
moi^e so than iu TL astarte. The marginal scalloped black line has much shallower scallops than 
in H. astarte. The hind wings are also more dusky than in the latter species, those near the apex 
becoming straight lines. 
