162 PROCEEDINGS OF THE NATIONAL MVSEUM. vol.xxi. 



Mr. Orote's type; but his description evidently refers to a specimen in 

 which the longitudinal shading through the inferior portion of the wing 

 is well marked. So far as distribution is concerned and the dates of 

 appearance, these seem to be the same in the two species. 



Tliese are i)erhaps the most closely allied of any of the species in the 

 genus, and they are mixed in collections generally. It is very probable 

 that all previous authors have confused the two: but Mr. Grote's 

 description, being defined, must be applied to the form agreeing with it. 



LARVA. 



Saunders, Ihh. In.j. Fruits, 1881, p. 313 (hrumosa); Kept. Ent. Soc. Ont., 1883, 

 p. 12 {briimosa). — Packard, Filth i\cpt. U. S. Ent. Comm., 1890, p. 498 

 (species 13, l)ircb). 



Stage VI. — Head shining black; width, 2 mm. Body black, jiale in 

 the incisures; a substigmatal yellowish band, diffuse below. Hairs 

 rather stilf throughout, a few long ones at the extremities; all ])ale yel- 

 lowish except some black ones from warts 1 and 11 on joints 5 and 12. 



Staf/e VII. — Head shining black, no marks; width, 2.5 mm. Body 

 black, paler in the incisures, with the substigmatal baud as before. 

 Hair short, in small bunches from the warts, dorsal space appearing 

 somewhat broadly black from the absence of hairs. Hair pale yellow, 

 soft, a few bristly ones from tubercle 1 and some black ones on joints 5 

 and 12. 



Cocoon. — Sjjun tightly among leaves; composed of silk. 



Fupa. — Like that of .1. inipre.ssa exactly. 



Food plants. — Poplar, willow, birch, alder. 



ACRONYCTA BARNESII, new species. 



(Plates XIII, fig. 10, male adult; XXII, fig. 15, male genitalia.) 



Ground color dark ashen-gray, very strongly powdered with black. 

 Head without distinct markings, though there is a tendency to become 

 black on the vertex. The patagiae are black margined, and the disc 

 also tends to become more or less black lined. The ])riniaries have all 

 the ordinary markings obscured and tend to become strigate. The 

 transverse anterior lino may be traced, in some specimens, across the 

 entire wing. It is black, geminate, the outer portion being the more 

 evident. As a rule it consists of a pair of oblique streaks from the 

 cost a toward the middle of the wing. The median shade is marked in 

 the same Avay, as a. single streak from the costa toward the faintly 

 indicated reniform. The transverse posterior line is barely indicated 

 in some specimens; but usually wanting altogether. There is no sub- 

 termiiuil line; but a vague paler shading may be traced, i)arallel with 

 the outer margins, in some specimens. There is a series of black ter- 

 minal spots, beyond which the fiinges are prominently cut with black, 

 and from these spots a series of rays extend inward; that above vein 5 



