242 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



Heterocampa obliqua Parkard. 



(PI. V, ligs. 7J,8J,99.) 



Heterocampa roria Walk., Cat. Lep. Het. Brit. JIus., p. 1023, 1855. 



Heterocampa obliijua Pack., Proc Eut. Soc. Pbil., iii, p. 368, 18(jl. 



Heterocampa trouvelotii Pack., Eut. Soc. Phil., iii, p. 369, 1864. 



Heterocampa ohliqua Grote and Kob., TraiLS. Amer. Eut. Soc, i, p. 178, IMiT, I'l. IV, tigs. 26(?, 27 9. 



Heterocampa hrunnea Grotto aud Rob., Trans. Amer. Eut. Soc, i, j). 180, 1S67, PI. IV, fig. 28 9. 



Heterocampa obliqua Grote, Now Check List Lep. N. Amer., p. 19, 1882. 



Smith, List Lep. Bor. Amer., p. 31, 1882. 



Kirby, Syn. Cat. Lep. Het., i, p. r>()3, 1892. 



Dyar, Ent. News, iv, p. 33, Jau., 1893. 



Neum. and Dyar, Trau.s. Amer. Ent. Soc, xxi, p. 205, ,Iuue, 1894; Journ. N. Y.. 

 Eut. Soc, ii, p. 117, Sept., 1894. 



Larva. 



(PI. XXX, fig. 1, 1«, 1?-, Ic, 2, 2,(, 2/-. 2c.) 



Packard, .Journ. N. Y. Eut. Soc. iii, p. 27, March, 1895. (All stages. Figs, of Stages I. II. with spines of if. 

 ijuttU-itta. stage I.) 



Moth. — Two <? , two 9 . Dark brown, witli darker streak.s and lines, niariiiued witli reddisb; 

 a large oblique costo-apieal wliite patcb. 



Head, pectoral tuft, and tliorax ciuereou.s, except tbe black edges of tbe patagia and tbe 

 posterior margiu of tbe tborax. 



Fore wings of a unitbrni dark asben brown; tbe basal balf of ibe wing is crossed by tbree 

 interrupted Hues, composed of linear, black, sligbtly curved lines or luuules. margined on botb 

 sides witb ferrugiuous ashen. The lirst or basal line is straight, and reaches only to tbe base of 

 the iuternal angle, which is black. The middle line is double, composed of two parallel linear 

 sinuate lines which become obsolete on the costa, is curved outward on the median vein much 

 more than in H. antarte, aud is obsolete on the iuternal edge. The third line is single and consists 

 of the curvilinear black discal mark aud a second curvilinear line below the fourth median venule. 

 On tbe costa it is represented by two parallel brown lines, inclosing a white spot. Outside and 

 parallel to the discal curvilinear mark is a line composed of two curved luuules, which are 

 geminate, and iuclose a reddish brown line. From the upper line extends toward the apex a 

 very distinct white patch dusted over with oclierous scales. On its outer edge are three black 

 iuterveuular streaks, bathed with ferrugiuous scales. In the middle of the wing and just below 

 is a round rusty patch. Below the median vein aud its branches the wing is lighter, aud, like 

 the costa, covered with cinereous and dark ocherous scales. 



Hind wings in S 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 ba.se, becoming quite dark grayish 

 browu toward the outer edge. 



Underside of the fore wiugs dark, except iu the middle region, which is very pale. White 

 and dark marks on the costal edge, and the costo-apical white patch appears through from above. 

 Hind wings white, the fringe discoloi-ed on the venules. 



Exi)anse of wings, $ 42 mm., 9 '18-53 mm. ; length of body, 6 22 mm., 9 20-23 mm. 



This species differs from //. untartc iu the uniform dark ash-brown hue of tbe fore wings,, 

 there being iu the usual normal form no olive.greeu scales iuteruuxed, but rather a teudency to 

 reddish brown, as seen in var. hrunnea ; also in the larger oblique white subapical patch, the 

 oblique black shade bordering it externally being broader, more diffuse than in E. astarte, and 

 containing short iuterveuular black slashes, aud this baud is iu J£. obliquttcoutimied to the iuternal 

 edge of the wiug, 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, 

 more so than iu H. astarfc. Tlie marginal scalloped black line has much shallower scallops than 

 in II. ustarte. The hind wings are also more dusky than in the latter species, those near the apex, 

 becoming straight liues. 



