102 
EEOSIID^. 
and having between tliem at the end of the cell a white lunule on a black patch ; a lunulate 
black submarginal band with white on its outer edge ; a series of antecilial black triangular 
spots. Hind wing fuscous, with indistinct medial and postmedial bands. Cilia of both 
wings olive and black. Underside paler : an indistinct lunule on a black patch at the end of 
cell of both wings ; fore wing with faint postmedial and submarginal bands; hind wing whitish, 
with the medial and postmedial bands well marked. 
EROSIID^. 
Dirades leucocera. (Plate CL. fig. 13.) 
Expanse | inch. 
Male. Shaped as in D. adjutaria, except that the outer margin of hind wing is not quite 
so evenly rounded. Fore wing pale purplish brown irrorated with dark scales ; a dark 
oblique streak from centre of costa to lower end of cell ; a pale line with dark inner margin 
from costa one third from aj)ex to first median nervule near outer margin ; a large semicircle 
on the inner margin two thirds from base, black, with pale border and indigo centre ; a pale, 
nearly straight line from apex to outer angle ; the rounded outer margin bluish grey. Hind 
wing deep chocolate ; narrow white subbasal and medial bands, the costal portion of the area 
between them suffused with white ; outer margin blue-black, inwardly-bounded by a pale line, 
from second median nervule to anal angle. Pure white hairs on the fold of hind wing. Cilia 
of both wings white. Underside of fore wing pale vinous brown with dark dots, of hind wing 
uniform white. Vertex of head and shaft of antenna) pure white. 
Allied to D. b'motata, but to be distinguished from that and the other species of the genus 
by its brighter coloration and white fold on inner margin of hind wing and white underside. 
The genus Dirades was formed for the species with this fold and with rounded outer 
margin to hind wing in male, and all the species without tlie fold and with slightly tailed hind 
wing should be placed in the genus Erosia. The species figured as D. adjutaria in Lep. Ceyl. 
iii. pi. 186. fig. 9 is E, verticaria, Teld. ; the species figured as D. binotata being the true 
D. adjutaria. The species of the family Erosiidse all rest with the fore wing held more or less 
apart from the hind wing ; this habit is carried to its extreme in Gathynia iniraria, which 
holds its fore wings at right angles to the body, and curled up into a tube, while the hind 
wings are closely folded along the abdomen, so that the insect takes the form of a cross. 
This family has in reality no affinities with the Geometres, the larvae being quite different 
and nearer to those of the Bombyces, and it is probably allied to the Drepanulidae. 
Erosia alWda. (Plate CL. fig. 10.) 
Expanse |- inch. 
Male. Apex of fore wing rounded ; outer margin of hind wing evenly rounded, except 
for very slight tails at first subcostal and third median nervules. Wings greyish white, with 
