no. i. BOMBYCINE MOTHS OF NORTH AMERICA— PACKARD. 21 



The larva is thus far unknown. 



Geographical distribution. — Neogaeic realm. The species thus far known are confined to 

 Chile. [According to Kirby P. rubrescens also occurs in Peru.] 



Wings more rounded, less falcate; ocellus oval P. cinerascens. 



Basal line curved; ocellus large, oval, sinus on vein VI deep; hind wings not rosy P. rubrescens. 



Basal line sharply bent; ocellus large, round; sinus deeper still; hind wings rosy at base P. andromeda. 



POLYTHYSANA CINERASCENS (Philippi). 



Attacus cinerascens Philippi, Linnaea Ent., XIV, p. 278, 1860. 



Polythysana cinerascens Maass and Weymer, Beitr. Schmett., Ill, fig. 39, 1872. 



I'olythysana apollina Felder, Reise d. Novara, Lep., IV, Taf. 87, fig. 2, 1874. 



Imago. — o" . Judging by Felder's figure of a J, this species differs from the two others 

 (P. rubescens and andromeda) in the fore wings being a little less falcate, and the hind wings 

 less angular, the outer edge being fuller, more rounded. From P. andromeda it also differs in 

 the ocelli of the fore wings being oval, i. e., wider than long, the longer axis extending across 

 the wing; also in having no basal line on the hind wing. 



One 9 . Compared with a 9 P. andromeda of nearly the same shape, the fore wings are 

 broad and but slightly falcate. The hind wings are well rounded ; the apex full, rounded, and 

 the outer edge full, convex. The thorax and abdomen are not quite so shaggy as in P. andro- 

 meda. Head in front of moderate width, much as in P. andromeda. 



Body and wings reddish brown, especially those of the hinder pair. Fore wings reddish 

 brown, the surface in the middle and on the costal edge frosted with whitish pink scales. Basal 

 line broad, heavy, reddish brown, curved, rather than suddenly bent as in P. andromeda, near 

 the hinder edge of the wing, and passing very near the ocellus, nearer than in P. andromeda. 

 The outer or submarginal line distinct, sinuous as in the other species, but the two scallops on 

 vein Cu 2 are less deep and marked than in 9 of P. andromeda. The line is deep reddish brown, 

 edged externally with whitish pearl gray. Ocellus smaller and more oval than in P. andromeda, 

 its axis transverse to the wing, being longer than the longitudinal axis, or along the length of 

 the wing; an outer submarginal deep rich madder-brown broad ring; within this ring a much 

 broader deep snuff-yellow ring, while the oval center is of the same color, but with a few central 

 whitish scales, the inner side of the central area being bounded by a curved fine whitish hair 

 line. 



Hind wings of a soft delicate uniform roseate brown hue; the wing smoky at the base, 

 and the extradiscal fine or band is broad, smoky brown, fading out toward the ocellus, and 

 situated farther from that spot than in 9 P. andromeda; this line is a little less sinuous than 

 in the latter species. 



Underside of fore wings ; no basal line ; submarginal line blackish, diffuse, becoming narrow 

 and nearly obsolete before reaching the apex of the wing. Discal spot large, not quite round, 

 somewhat oval, deep rich rose-red surrounded by a broad black ring, hind wings uniformly 

 of a solid fawn brown; the ocellus faint, only the short curved fine white line distinct, while 

 the outer line is very indistinct. Abdomen and underside of the body fawn-brown, while the 

 tibiae and tarsi of all the legs are black brown. It differs entirely from P. andromeda 9 in 

 the rose-red ocellus (this being black in that species), and in the uniform fawn-brown color 

 of the wings, the fore wings being a little dusky at base. 



Expanse of wings, 9 106 mm. (in <? , judging by Felder's figure, 82 mm.). 



Length of one fore wing, 9 52 mm. 



Breadth of one fore wing, 9 29 mm. 



Length of one hind wing, 9 38 mm. 



Breadth of one hind wing, 9 30 mm. ' 

 Geographical distribution. — Quillota, 20 miles northeast from Valparaiso, Chile (Bartlett- 

 Calvert). 



