ARCTIADA AND NOCTUIDH FROM FORMOSA. 165 
curved from costa to vein 4, thence oblique to dorsum: a white dot 
adjoining postmedial under vein 2, and a blackish diffuse streak from 
white dot to antemedial line; orbicular and reniform stigmata pale 
with dark centres ; two short black streaks between veins 1 and 4; 
fringes dark grey, paler marked at ends of the veins, a black line at 
their base interrupted by the veins. Hind wings whitish powdered 
with brownish, densely on terminal fourth; discoidal lunule and 
postmedial line dusky ; fringes pale, traversed by a dark central line. 
Under side whitish, sprinkled, and on fore wings clouded, with 
brownish ; all the wings have a blackish discoidal mark and a post- 
medial line. 
Expanse, 34 millim. 
Collection number, 1742. 
One male specimen from Rantaizan, May 9th, 1909. 
Chytonix variegata albidisca, ab. n. 
Differs from the type in having a large white patch on central 
area of fore wings extending from postmedial almost to antemedial 
line, it encloses the stigmata and unites with the typical white dot. 
Expanse, 35 millim. 
Collection number, 1748. 
One male specimen from Rantaizan, May 10th, 1909. 
C. variegata is closely allied to C. albonotata, Staud. 
Chytonix olivacea, sp. n. 
$. Head and thorax dark grey, black mixed, antenne ciliated ; 
abdomen pale grey, whitish at base and on last segments. Fore 
wings pale olivaceous grey clouded with darker, costa marked with 
black ; subbasal line black inwardly edged with white, nearly straight 
but indented below costa and above dorsum; antemedial and post- 
medial lines black, both wavy, the former double and angled above 
dorsum, the latter outwardly edged with white; subterminal line 
pale, undulated; reniform stigma outlined in white; fringes varie- 
gated with white, preceded by a series of black lunules. Hind wings 
whitish powdered with dark grey; discoidal spot blackish, traces of 
a dusky postmedial line; fringes paler. Under side whitish, disc of 
the fore wings suffused with blackish ; discoidal mark and post- 
medial line on the hind wings blackish. 
Expanse, 38 millim. 
Collection number, 1753. 
One male specimen from Rantaizan, May, 1909. 
Euplexia albirena, sp. n. 
9. Head pale brown darker mixed, thorax dark brown mixed 
with blackish ; abdomen brownish, the sides and crests darker. Fore 
wings purplish grey; subbasal line ochreous, indistinct except towards 
the costa, where it is inwardly edged with black, some black marks 
beyond the indistinct lower half; antemedial and postmedial lines 
ochreous edged with black, the enclosed space below the cell rather 
darker than the ground colour; subterminal line ochreous, wavy ; 
orbicular stigma, which is preceded and followed by a black quadrate 
