174 MR. F. WALKER ON HETEROCEROUS LEPIDOPTERA 
base of the Ist inferior vein, and with another on the exterior border. 
Length of the hody 7 lines; of the wings 14 lines. 
Gen. Darna, n. g. 
Mas. Corpus robustum. Proboscis obsoleta. Palpi porrecti, sat va- 
lidi, caput paullo superantes; articulus 3" parvus, conicus. Antenne 
breviusculee, pectinate. Abdomen alas posticas non superans, fasci- 
culo apicali sat magno. Pedes robusti, pilosi. Ale latiuscule, brevi- 
usculze. 
Male. Body stout. Proboscis obsolete. Palpi porrect, moderately 
stout, extending a little beyond the head ; 3rd joint minute, conical. 
Antennz rather short, moderately pectinated. Abdomen not extend- 
ing beyond the hind wings; apical tuft rather large. Legs stout, 
pilose. Wings rather broad and short. Fore wings acute; costa 
straight; exterior border hardly oblique; the four infericr veins ap- 
proximate. 
209. DARNA PLANA,n.s. Mas. Nivea, alis anticis pallidissime cervi- 
nis, dimidio postico niveo, linea exteriore e atomis nigris, alis posticis 
subtestaceo tinctis margine exteriore pallidissime cervino. 
Male. Pure white. Fore wings very pale fawn-colour, except for half 
the breadth along three-fourths of the length; an exterior line com- | 
posed of black speckles, parallel to the exterior border, and hardly | 
apparent except on the costa and by the interior border. Hind wings 
with a very slight testaceous tinge; exterior border very pale fawn- 
colour. Length of the body 33 lines; of the wings 9 lines. 
Gen. ARRHAPA, 0. g. 
Mas. Corpus robustum. Proboscis obsoleta. Palpi porrecti, sat gra- 
ciles, caput vix superantes ; articulus 3"5 conicus, minimus. Antenne 
subpectinatee. Abdomen alas posticas vix superans. Pedes brevius- 
culi, laves, sat graciles; tibize posticze calearibus duobus apicalibus, 
uno longissimo. Ale late, non longe ; anticz acute, costa subcon- 
vexa, margine exteriore recto. 
Male. Body robust. Proboscis obsolete. Palpi porrect, not thick, 
hardly extending beyond the head; 3rd joint conical, very minute. 
Antenne slightly pectinated, moderately long. Abdomen hardly ex- 
tending beyond the hind wings. Legs rather short, not stout nor 
pilose ; hind tibize with two apical spurs, one of which is very long. 
Wings broad, not long. Fore wings acute, slightly and transversely 
rugulose ; costa slightly convex ; exterior border straight, very slightly 
oblique; 3rd inferior vein very near the 2nd. 
210. ARRHAPA FRONTALIS, n.s. Mas. Lateritia, capite thoraceque 
antico ferrugineo-fuscis, abdomine alisque posticis albidis, alis anticis 

