84 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



whitish apical streak, which faintly connects with an obscure scalloped line, becoming more 

 distinct on the hinder half of the wing. 



Hind wings paler than the anterior ones, and with no discal spot. There are two outer 

 lines, obscure, diffuse, the inner one curved outward opposite the discal area; edge of the wing 

 darker ochreous. 



Wings beneath showing no discal spots and no lines; the outer margin of both pairs of 

 wings ochreous, the wings within paler. 



Abdomen black above, the tip ochreous as is the under side, tibiae and tarsi dark brown. 

 Expanse of fore wings, S 65 mm. 

 Length of one fore wing, c? 33 mm. 

 Breadth of one fore wing, S 12 mm. 

 Length of hind wing, s 25 mm. 

 Breadth of hind wing, d" 13 mm. 

 Geographical distribution. — Western coast of South America; Chile. 



DIRPHIA Hiibner. 

 [Dirphia Hubner, Verz. bek. Schmett., p. 153 (1822?).] 



[Dr. Dyar writes that Hiibner included four names under Dirphia: tarqinius, acidalia, 

 speciosa, and agis. According to Kirby's Catalogue the first two are one species, D. tarquinia 

 Cramer, which he designated as the type of Dirphia. Kirby refers speciosa to Plateia, and agis 

 to Phricodia.'] 

 [Dirphia] Kirby, Syn. Cat. Lep. Het., I [p. 793]. 



Imago. — S and 9 . Head, front rather narrow, with long scales; eyes moderately, fairly 

 large. Antennae of male rather short and broad, a little wider and shorter than in Ormiscodes; 

 pectinated to the tip; joints (in D. hoegei) short, thick, and well ciliated; the distal pectinations 

 are dorsal, arisingf rom the upper side, and the inner ones are short, not quite one-half as long as the 

 basal ones, the outer set are shorter than the inner by a third of the length of the outer ones. 

 Female antennae subsimple (D. hoegei and semirosea), joints on the basal half wider than long; 

 basal pectinations large, dentiform, ending in two unequal bristles, in 9 D. speciosa the teeth 

 (basal pectinations) are smaller, and there are minute vestiges of the distal pectinations. 



Palpi much as in Ormiscodes, being rather thick and short, reaching a little beyond the 

 front; third joint usually not very distinct, depressed. No vestiges of the maxillae are visible 

 in the undenuded example. 



Thorax rough and shaggy, with numerous iong, erect, paddle-shaped scales, these being 

 stiff er and more numerous than in Ormiscodes (0. cinnamomea). Wings large and broad, 

 wider than in Ormiscodes, but much as in Phricodia agis. Fore wings not falcate, costa slightly 

 curved, apex rectangular; outer edge only slightly convex. 



Hind wings not quite so full and rounded at the apex as in Ormiscodes, being rather wide, 

 and extending well beyond the end of the abdomen. 



Markings: No distal spot on wings of either pair, except a diffuse sublinear irregular faint 

 indistinct dark or white line. The extradiscal line runs very near the discal mark. Abdomen 

 banded with brown and white, or snuff-yellow ochreous and dark brown. 



As the vestiges (teeth) are smaller in speciosa than in the other species known to me, and 

 since there are minute vestiges of the distal pectinations, this species may be regarded as more 

 primitive and generalized than the two others. 



Geographical distribution. — Eastern coast of South America, southern Brazil to Demarara 

 and Trinidad, to Central America and Mexico, both the west and east coast, including Costa 

 Rica and Jalapa, Mexico. [D. plana (Walk.) is described from Haiti.] 



SYNOPSIS OF THE SPECIES. 



Rose-pink; vestiges of distal pectinations present, fore wings elongated speciosa. 



Wings broad; basal and extradiscal lines white, interrupted; hinder end of thorax and abdomen banded with rose- 

 pink semirosea. 



Wings very broad, chestnut brown, hind wings reaching farther beyond end of abdomen; abdomen brown, banded 

 with ochreous hoegei. 



