Silk-producing Bombycide. 327 
white silken cocoon on the inner surface of the leaf, or even, 
should it fall from the tree, under a tile or stone, or against a 
flower-pot. There are certainly two broods during the summer 
months, and I suspect as many as three or four. 
The larva is of an earthy-brown colour, and covered with short 
hairs ; it has a raised transverse ridge across the second segment, 
in front of which is a blackish patch ; it has a very short truncated 
spine on the middle of the penultimate segment, which usually lies 
down pointing backwards, and even with the plane of the back ; 
it is, however, capable of being raised into an erect position when 
the insect is disturbed. The general appearance is rough and 
bark-like, and the ventral line is thickly fringed, as are the feet 
also, with rather long hairs. 
The moth, judging from the description given by Mr. Moore of 
his species O. Lida, appears closely allied to it, and were it not 
that he makes no mention of the three black spots on the ab- 
dominal margin of the lower wings, of a black dot on the disc 
beneath, and gives palpi ferruginous instead of dusky black, I 
should have been strongly tempted to consider them as identical. 
The wings in both sexes are of a creamy white, partially suffused 
with a faint ferruginous tinge; an indistinct undulating sub- 
marginal line bearing a ferruginous mark on each nervure, the 
largest being on the costal margin ; abdominal and outer edges of 
the wings well fringed with long cilia, forming a well-marked 
border ; an indistinct sub-basal wavy line with one or two in- 
distinct ferruginous dots on the nervures; on the hinder wing is 
a wavy, very indistinct pale-brown band at about one-third from 
the margin; the fringe of the lower wings terminates in a pro- 
jecting square patch, caused by the turning down or folding of the 
remaining portion of the abdominal margin, on which are three 
ferruginous dots. Body tricarinated, or having a dorsal and a 
lateral line on each side composed of tufts of long scales of a 
triangular form, and appearing like a projecting serrated line ; 
colour very faint ferruginous, or sandy brown, very little darker 
than the wings. Antenne bipectinated and faintly tinged with 
ferruginous ; thorax, and forehead between the eyes, white ; eyes, 
palpi, and inner side of forelegs, dusky black; under side ashy 
white, the wavy brown bands and spots well defined, and there is 
a black dot on the dise of the lower wings ; body beneath whitish. 
Expanse of wing in the male 13 inch, in the female 2 inches. 
The silk of this species is fine and elastic; the cocoon oval, 
flattened beneath where in contact with the leaf, convex above; 
it is enveloped in a light screen of floss silk, spread over it in 
