NO. 1140. NORTH AMERICAN NOCTUIBAE— SMITH AND DYAR. 159 



fined basal black streak, below which the space is blackish. An 

 oblique black mark extends from the transverse anterior line to the 

 median shade just above vein 1. The ordinary spots are not well 

 maiked, though visible. The orbicular is round, moderate in size, 

 ringed with black scales, and with a smoky center. The reniform is 

 large, kidney-shaped, smoky. The secondaries are soiled whitish in 

 the male, smoky in the female. 



Expanse, 1.32 to 1.40 inches (33 to 35 mm.). 



Habitat. — Calgary, Canada; Easton, Washington. 



I have only two specimens of this species. The male, a very good 

 specimen from Calgary, received from Mr. Dod: the female, evidently 

 an electric-light capture, because one secondary is scorched, taken by 

 Mr. Koebele and belonging to theU. S. National Museum, and these are 

 the types. The female is very much darker than the male and the 

 markings are hardly relieved. The male might pass as a very dark 

 impressa^ but the female shows more resemblance to sperata. In fact, 

 the male itself would be more readily considered a variety of sperata 

 than of impressa, though when the markings are closely compared the 

 resemblance is to impressa. In the male characters tliis resemblance 

 is intensified, because there is practically no difference in the genitalia, 

 nor, indeed, in the leg structure. Nevertheless, I believe this to be a 

 good species from the characters above given. 



ACRONYCTA IMPRESSA Walker. 



(Plates I,fig. 12, adult; VIII, figs. 33, 34, larva; XIII, figs. 4, 5, male aud female adult; 

 XIV, fig. 9, thorax; XVIII, fig. 19, leg; XXII, figs, 10, 11, male genitalia.) 



Acfonycfa impressa Walker, Cat. Brit. Mus., Het., 1856, IX, p. 61.— Ghote, 111. 



Essay, 1882, p. 38=&rM>«osa Grote.— Butlek, PZnt. Amer., 1887, III, p. 35, an 



sp. dist. brumosa Gu6n^e. 

 Fharetra impressa Grote, Mitth. a. d. Roem. Mus., HildesL., No. 3, 1896, p. 7. 

 Acronycta fasciata Walker, Cat. Brit. Mns., Het., 1856, IX, p. 62.— Grote, 111. 



Essay, 1882, jp.d9=hrumosa Grote.— Butler, Ent. Amer., 1887, III, p. 35 = 



wnjressa. 

 Acronycia hrumosa Grote, in lists and coll. — Speyer, Stett. Ent. Zeit., 1875, 



XXXVI, p. 109.— Butler, Ent. Amer., 1887, III, p. 35 ^im^^ressa. 

 Apatela hrumosa X Packard, Forest Insects, 1890, p. 169. 

 Acronycia verriliii Grote and Robinson, Trans. Am. Ent. Soc, 1870, III, p. 178, pi. 



II, fig. 82.— Morrison, Can. Ent., 1875, VII, p. 79=innotata; Ann. Lye. Xat. 



Hist., N. Y., 1875, XI, p. 92 — brumosa; Psyche, 1875, 1, p. i2 = brumosa. 



Ground color a somewhat dirty ashen gray, more or less black pow- 

 dered. Head with a dusky line on the front, and usually another on 

 the vertex. Collar tipped with black or smoky, although this is incon- 

 stant. Patagiae more or less black margined, and the disk also irregu- 

 larly powdered. The primaries have the ordinary markings distinct. 

 Basal line geminate, black; transverse anterior line geminate, smoky 

 or blackish, more or less interrupted, outcurved in the interspaces, as 

 a whole a very little oblique. The median line is more or less obscured 



