80 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



Legs black; femora tawny, of the same hue as the under side of the body. 

 Expanse of fore wing, <? 80 nun.; 9 90 nun. 

 Length of fore whig, o* 41 mm.; 9 50 mm. 

 Breadth of fore wing, <? 20 mm.; 9 25 mm. 

 Length of hind wings, 6" 28 mm. ; 9 33 mm. 

 Breadth of hind wing, S 20 mm.; 9 26 mm. 

 This moth differs from any species of Dirphia known to me in its faded-out tawny hue, 

 the larger irregular discal ring, and the two parallel extradiscal dark lines; also in the more 

 acute apex of the fore wings. 



CATOCEPHALA Blanchard. 



Catocephala Blanchard in Gay, Faun. Chil., VII, p. 62, 1852, Lam. 6, fig. 1, 1854. 



Imago. — 6* and 9 • Head much as in Ormiscodes (0. cinnamomea) , with a rather narrow 

 front; eyes rather large. Antennae of male longer than in Molippa or Rhod ormiscodes, and 

 slightly longer than in Ormiscodes; not so broadly pectinated as in Rhod ormiscodes; only the 

 extreme tip subfiliform; joints moderately long; basal pectinations slender; distal pectinations 

 slender, the outside ones two- thirds as long as the basal pectinations; the inner ones a little 

 shorter, being much longer than in Dirphia hoegei and a little longer than in Ormiscodes cinna- 

 momea; in 9 subfiliform, the pectinations vestigial, toothlike, ending in two hairs; vestiges 

 of the distal pectinations minute and with no hairs. Palpi much as in Ormiscodes (0. cinna- 

 momea), extending beyond the front, but drooping, terminal scales long, irregular, and third 

 joint not distinct, being concealed by the scales projecting from the end of the second joint. 



Thorax shaggy, rough, with numerous irregular long flattened paddle-like hairs, either 

 acute or oval at the end. 



Fore wings much as in Ormiscodes (0. cinnamomea), not so long as in Molippa, not falcate, 

 apex not produced, but rather square, outer edge very slightly falcate (O. alanus) or not at all 

 so (O. rufosignata) . 



Hind wings more produced at the apex than in Ormiscodes (0. cinnamomea) or in any 

 other genus of the group known to me, especially marked in the 9 ■ They do not reach to the 

 end of the abdomen, being shorter than in Ormiscodes and much shorter than in any other 

 genus of the group. 



Markings: Body and wings reddish brown or gray and pale ochreous. A small white 

 ochreous oval or linear oval discal spot on the fore wings, none on the hind wings. An extra- 

 discal line common to the wings of both pairs. A basal line, and on the bind wings two sub- 

 parallel lines, the outer situated about halfway between the outer edge and the extradiscal line. 

 The females are much alike, the males more divergent in coloration. 



This genus is intermediate between Molippa and Dirphia, and on the whole most nearly 

 allied to Ormiscodes (0. cinnamomea). 



Geographical distribution. — The species are confined to Chile, or at all events to the west 

 coast of South America. 



[C. amphinome (Fabr.) occurs in Tierra del Fuego.] 



SYNOPSIS OF THE SPECIES. 



Reddish brown ; lines not scalloped ; discal spot small ; abdomen not banded C. alarms. 



Gray; lines scalloped; discal spot. large; abdomen yellow, banded with black C. rufosignata. 



CATOCEPHALA RUFOSIGNATA Blanchard. 



Catocephala rufosignata Blanchard in Gay, Faun., Chil., VII, p. 63, 1852, Lam 6, fig. 1, 1854. [According to Kirby 

 this is the type of the genus.] 



Imago. — One 6* , one 9 . Body and wings gray, with a tawny ground color in 6" and a 

 roseate tinge in 9 • Head and antenna? tawny. Palpi distinct, depressed, extending beyond 

 the front of the head, black. 



