142 
SATURNIA CYNTHIA. 
with a broad transverse light-coloured hand near 
the middle, the space within which (forming nearly 
an equilateral trianglo) is brownish-grey, and that 
without ash-colour, running into brownish-grey at 
the margins of the wings ; just within the margins 
there are two narrow brown streaks running parallel 
with them, somewhat interrupted before reaching a 
black spot near the apex of the superior wings; 
this spot is surmounted by a white crescent, and 
a zigzag white line runs from it to the tip. The 
basal portion of the superior wings is traversed by 
an ash-coloured bar, commencing on the posterior 
edges next the shoulder, and after continuing nearly 
in a straight line for about half an inch, is suddenly 
deflected and terminates on the anterior margin; 
between this bar and the transverse serpentine line, 
there is a pale longitudinal spot surmounted with 
black. The under wings likewise bear a similar 
spot, but more crescent-shaped ; and towards their 
base, there is an ash-coloured arched bar, bounded 
on the outer side with black. The under side differs 
principally in being paler and destitute of the angu- 
lar and arched bars at the base of tlio upper and 
lower wings. 
The caterpillar of this moth is the Arrindy silk- 
worm, for an account of which we are indebted to 
Dr. Roxburgh, who published an interesting me- 
moir on the silk-producing moths of the East Indies 
in the 7th volume of the Linnean Transactions. The 
eggs are described by him as numerous, ovate, pure 
white, about the size of a large pin's head. They 
