156 rBOCEEDTNGS OF THE NATIONAL MUSEUM. vol.xxi. 



12, wart IV small. Pinkish or creamy brown, more or less mottled 

 witli blackish shades, especially in a broken dorsal band, segmentarily 

 fnrcate, between warts II and III and around the spiracles. A red 

 substij?matal band, sometimes scarcely defined from the general reddish 

 color. Hairs bristly, li<;ht red, brighter on joint 5; a few long ones at 

 the extremities, and tufts of short, fine, feathery whitish hairs from 

 warts I to III, on Joints 6 to 12, more or less abundant. Another 

 exam]>le was heavily shaded with black, the hair still red, the red sub- 

 stigmatal line and a series of subdorsal patches retaining the usual 

 color. Head brown black. 



Cocoon. — Spun between leaves partly bitten up into little i)atches, 

 elliptical, thin, single, comi)osed of pale silk. 



Pupa. — Dark brown, a little blackish dorsally; fixed abdominal seg- 

 ments tapering; segments coarsely pointed, granular above; quite 

 smooth in a narrow posterior rim. Thorax and cases wrinkly. Ore- 

 master rather long, narrow, conic, smooth, terminating in a dense, 

 round tuft of bristles. 



Food plants. — Poi)lar, alder. 



ACRONYCTA NOCTIVAGA Grote. 



(I'hites I, lit;. H. adult; VIH, lit,rs. 27, 2S, larva; XVIII, iif>.21, leg; XXII, fig. 6, 



male genitalia.) 



Acronijcia voctirana CiKOTk, Proc. Kut. Soc. Pliila., 1864, II, ]). 437, )>1. ix, fig. 3. — 



Bkthunk, Can. Ent., 186it, I, p. 71. 

 Apatehi iiortirm/a Packauo, Fonsst Insocta, ISDO, p. 460, 



rharelra nodlriuja (Jhotk, Mittli. a. d, Roein. Mus., Hildesh., No. 3, 1896, p. 7. 

 Acroui/cta loiit/a Walkek, Cat. Brit. Mus., Ilet., 1856, IX, p. 60. — (Jkotk and 



Robinson, Trans. Ara. Knt. Hoc, 1868, II, p. 77, pr. syn. — Butlkk, Eut. 



Amer., 1887, III, p. 36, pr. syn. 



Ground color white or nearly so, overlaid by black scales, and mot- 

 tled so as to give the insect a somewhat marbled api)earance. Head 

 irregularly njottled with black, usually with a distinct line across the 

 front. Collar with the upper half black. Thorax with patagiae black 

 marked, and the disk strongly black powdered. The wings have the 

 ordinary markings fairly evident, but confused by the irregular black 

 suffusion. The basal line is geminate and black, imiluded si)ace white. 

 Transverse anterior line geminate, black, outwardly oblique, strongly 

 outcurved between the veins, the included space white. The entire 

 basal space is black powdered, but below the middle it is entirely suf- 

 fuseil by blackish scales, so that there seems a contrast between the 

 ui)per and lower part. The median shade line is diffuse, starting 

 obliquely from the costa across the reniform, and below this running 

 l)arallel to the transverse jmsterior line. The transverse posterior line 

 is geminate, black, the inner line lunulate, the outer merged into the. 

 black subterminal space, the included space white, evenly sinuate, with 

 two strong outward teeth on veins 3 and 4. The subterminal line is 

 white, broken, defined by the black subterminal space and by a series 



