314 
NOCTUIDJ,. 
inner margin ; hind wing yellow irrorated with black-brown, 
the inner area whitish, a black discoidal point and medial series 
of dark stria?, a postmedial series of dark striae excurved below 
costa and above inner margin and with minute fiery red spots 
at discal and submedian folds, a subterminal series of blackish 
points, the termen tinged with fiery red especially towards 
apex and tornus. 
Hah. Br. Guiana, Berbice, 1 $ ; Brazil, Rio Janeiro, 
Tijuca (Wagner), 2 $ type. Exp. 36-38 millim. 
Genus THIOCHROA, nov. 
Type, T. flavala. 
Proboscis fully developed ; palpi upturned, the 2nd joint 
reaching to vertex of head, moderately scaled in front and 
angled with hair above at middle, the 3rd in male moderate 
and thickly scaled, in female long ; frons smooth, with slight 
ridge of hair above ; eyes large, round ; antennae of male 
bipectinate with rather long branches to two-thirds length, 
the apical part with bristles and cilia ; thorax clothed with 
hair and scales mixed and without crests ; tibia? slightly 
fringed with hair ; abdomen with some rough hair at base 
of dorsum but without crests. Fore wing with the costa 
moderately arched towards apex which is somewhat pro- 
duced, the termen evenly curved and not crenulate ; veins 
3 and 5 from near angle of cell ; 6 from upper angle ; 9 from 
10 anastomosing with 8 to form the areole ; 1 1 from cell. 
Hind wing with the cell about one-third length of wing ; 
veins 3, 4 from angle ; 5 fully developed from just above 
angle ; 6, 7 from upper angle ; 8 anastomosing with the cell 
near base only. 
Tliiochroa flavala, n. sp. 
Head yellowish white with reddish brown bars at middle 
and above frons and between antenna?, which are pale red- 
brown with the basal joint fiery red in front ; palpi rufous 
with a white line at extremity of 2nd joint ; tegula? pale 
red-brown slightly irrorated with whitish ; thorax and 
abdomen pale sulphur-yellow ; legs irrorated with brown, the 
tibiae with blackish bars at extremity, the fore tibiae with pale 
red streak in front, the mid tibiae with small red spot before 
extremity. Fore wing pale sulphur-yellow, the costal and 
terminal areas irrorated with brown, the costal edge brown 
irrorated with white and with rufous shade below it ; faint 
oblique antemedial and medial pale brown lines ; a black 
point in middle of cell ; postmedial line pale brown, excurved 
below costa, then oblique, some white points with brown 
between them beyond it on costa ; traces of a waved brown 
subterminal line defined on inner side by clear spots of the 
