ACIDALIA VIRGULARIA. 105 
with very faint pink tinge on the front and posterior 
segments. Head dirty, smoky brown, with pale stone- 
coloured streak on each lobe. ‘The medio-dorsal line 
is pale grey, but very narrow and indistinct ; on the 
10th to 13th segments it is very broadly edged with 
smoke-colour ; on the other segments this smoke-colour 
takes the form of a very pretty, but almost indescrib- 
able pattern, having the appearance of a double series 
of V-shaped marks, or rather a V mark and an X mark, 
the posterior half of the X, however, being much 
narrower than the anterior, the Y mark being within the 
anterior of the X mark. There are no other distinct 
markings, but the sides are much marbled with the 
dark smoke-colour. The ventral surface seems to 
have an underground of pinkish-grey, but 1s very 
strongly suffused throughout with pale blue; the 
sides are thickly dotted and marked with smoky black. 
Hixtending the whole length is a series of large pear- 
shaped marks, one on each segment, and the narrow 
end of the pear-mark pointing towards the head ; these 
marks are of two colours, a broad central stripe being 
pale blue, the remainder pinkish, and on the marks 1s 
a conspicuous series of black Y-shaped marks ; spiracles 
imperceptible. 
When at rest the food-plant is grasped by the 
claspers, and the anterior segments coiled inwards, 
the head and legs being tucked closely together. 
The cocoons were formed of a few threads, drawn 
loosely together in the corners of their cage, or 
amongst withered leaves at the bottom. 
The pupa is about three-eighths of an inch long, has 
the thorax rounded, the eyes prominent, and the 
abdomen tapering sharply to a point. Ground colour 
dark ochreous-yellow, and the back of each segment 
neatly marked with four transverse dark brown spots ; 
eye- and wing-cases dull dark green; tip of abdomen 
very dark brown. 
A beautiful and strongly-marked series (some almost 
black) of imagos emerged at the end of June or in 
