22 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



POLYTHYSANA RUBRESCENS (Blanchard). 



Plate C, fig. 3. 



Attacus rubrescens Blanchard, in Gay; Historia fisica y politica de Chile. Zoologia, VII, p. 60, 1852, Lep., pi. 4, 



fig. 3, $ . 

 Polythysana rubrescens Walker, Cat. Lep. Het. Br. Mus., VI, p. 1315. 

 Polylhysana rubrescens Kirby, Syn. Cat. Lep. Het., I, p. 785, 1892. 



Imago. — 1 o* . Body light chestnut brown. Fore wings tawny ochreous with fawn or 



chestnut shades. Basal line dark fawn brown, touching the discal ocellus and regularly (not 



angularly) curved outward before reaching vein VI. On the hinder half of the base of the 



wing within is a dull chestnut patch extending from base and nearly touching the basal band. 



Ocellus not round, but shorter than broad, suboval, tawny, encircled by a dark brown 



(not black) broad ring, a little more dusky within, i. e., the portion inclosing the narrow linear 



curved white line. Submarginal line also chestnut brown, the two scallops on vein IV 1 not 



so deep as in P. andromeda, and the sinus in front opposite the discal spot short and deep. An 



apical roseate spot edged within with white. 



Hind wings chestnut or fawn-brown at base ; the middle of the wing tawny ochreous from 



the inner edge to the costa, with no roseate tints within the extradiscal line, which is heavy, 



black, diffuse and not roseate toward the costa as it is in P. andromeda. Discal ocellus a heavy 



black ring centered with deep roseate ochreous; and with a white median linear crescent. 



Beyond the extradiscal line the brown margin of the wing is light brick red or roseate, but 



the fringe is fawn color. 



Under side of the wing, yellow ochreous; the ocelli much reduced, those of the fore wings 



a third smaller than above, pale brick-red encircled with black and a white line. On the hind 



wings the black ring i9 obsolete, and there is a small pink-red spot with a white line. Basal 



line of fore wing wanting, but the extradiscal line is present, and much more distinct than above. 



Expanse of the fore wings, o* 78 m m . 



Length of fore wing, 45 mm. 



Breadth of fore wing, 25 mm. 



Length of hind wing, 33 mm. 



Breadth of hind wing, 26 mm. 



Ocellus of fore wings 5^ by 7 mm., of hind wings 7 by 7 mm. 



This species is recognized by the pink red being confined to the outer edge of the hind 



wings beyond the extradiscal fine, and by the inside of the discal spot being olive fawn, not 



blackish. 



Geographical distribution. — Chile (Museum d'Hist. Nat. Paris), Coquimbo, Valdivia (Walker 



in Br. Mus.). 



POLYTHYSANA ANDROMEDA (Philippi). 



Attacus andromeda Philippi, Linn. Ent., XIV, p. 280, 1860. 



Polythysana andromeda Waterhouse, Aid to Identification of Insects, I, p. 119, fig. 1, 1882. 



Polythysana andromeda Kirby, Syn. Cat. Lep. Het., I, p. 785, 1892. 



Imago. — Two o" , one ? . The male is very near P. rubrescens, but a little smaller and 

 chiefly differing in the hind wings being deep pink red from the costa to the hinder edge of 

 the discal ocellus. Compared with P. rubrescens the basal broad blackish line makes a sharp 

 angle between the costa and ocellus, and the curve near the inner edge of the wing is nearly 

 angular instead of rounded. An apical roseate spot. The ocellus is larger than in P. rubrescens, 

 round, and is olive-green encircled by black, the center almost black and the white curved 

 line is less regular in shape. The extradiscal line has a shorter deeper sinus opposite the 

 ocellus, and the sinus on vein VI is deeper than in P. rubrescens. 



Hind wings of a beautiful roseate pink red on the costal half of the wing, the rosy tint 

 surrounding the large discal ocellus; behind and within the extradiscal line the wing is very 

 hairy and shaggy, "deep snuff ochreous, as is also the outer margin of the wing beyond the 

 extradiscal line. 



