NEW LEPIDOPTERA-HETEROCERA FROM FORMOSA. 149 



Two female specimens. One from Arizan (7300 ft.), August, 

 1908; the other from Rantaizan (7500 ft.), May, 1909. 



Deroca arizana, so. n. 



$ . Wings hyaline, with traces of greyish transverse lines ; some 

 greyish clouds on the outer margin, marginal line greyish interrupted 

 by the whitish veins. 



Expanse, 30 millim. 



Collection number, 1697. 



One female specimen from Arizan (7500 ft.), June, 1908. 



Greta brunnea, sp. n. 



^ . Head chocolate-brown ; thorax brown, greyish tinted in 

 front ; abdomen brown inclining to reddish. Fore wings brown, 

 flecked with greyish on basal area ; a dusky antemedial shade ; post- 

 medial line dark brown, almost blackish, outwardly edged with 

 greyish, and most distinct towards apex ; it runs from just beyond 

 middle of the inner margin to apex. Hind wings obscure reddish 

 brown ; indications of a dusky antemedial line, a few black dots on 

 the outer margin near anal angle. Fringes of all the wings reddish. 

 Under side orange-red, freckled with brownish ; outer area of the 

 fore wings washed with greyish. 



Expanse, 41 millim. 



Collection number, 1242. 



One male specimen from Arizan (7300 ft.), August 24th, 1908, 



< Greta pmyureofascia, sp. n. 

 ^ . Fore wings light brown, with reddish brown ante- and post- 

 medial lines, the latter angled near costa ; space between the lines 

 purplish brown, and this colour extends along the inner margin to 

 the base. Hind wings have tiie basal half purplish brown, limited by 

 a reddish brown line, and the outer half light brown. Under side 

 ochreous brown, sparingly freckled with blackish- 

 Expanse, 34 millim. 



Collection number, 1244. 



i ab. unicolor, nov. 

 All the wings purphsh brown, lines reddish brown as in the type. 



Both type and aberration are from Kanshirei ; the former 

 was taken in May, 1907, and the latter in July, 1908. 

 Near O. olga, Swinhoe. 



Aroa nigrofascia, sp. n. 



Fore wings brown, clouded with blackish at the base, and along 

 the costal area almost to apex ; antemedial band blackish, nearly 

 straight ; a blackish reniform mark at end of the cell ; postmedial 

 line blackish, diffuse, wavy, excurved below costa ; a series of 

 blackish lunules on the outer margin, preceded by some blackish 

 dots, near the costa and the inner margin ; fringes faintly chequered 



