102 ACIDALIA VIRGULARIA. 
their colouring began to appear, and from this time. 
they were generally in straight postures on their food- 
plant, and even when disturbed from it they remained 
rigid, as if feigning death. 
When full-grown the larva is nearly three-quarters 
of an inch in length; though convex both above and 
below, yet its shape appears a little flattened; the 
broadest segment is the ninth, from which those in 
front taper very slightly towards the head, which is 
the smallest seement, and is indented on the crown; 
the last four segments are also very little tapered until 
near the anal tip; all along the sides the inflated 
spiracular ridge is interrupted at each segmental divi- 
sion, and there are four subdividing wrinkles at unequal 
distances on the back, and twelve at equal distances on 
the belly, of each segment. 
The ground colour, according to the individual, is 
either brownish-grey or reddish or ochreous brown ; 
the head, dark in the centre, is brown, and freckled 
with darker at the sides; the subdorsal line begins a 
little below the crown of each lobe, and continues very 
distinct to the end of the fifth seoment, the dorsal 
line beginning on the second segment, and continuing 
distinct for the same distance, both being pale ashy 
or ochreous in colour; from thence to the tenth seg- 
ment both dorsal and subdorsal lines generally become 
so suffused in their course as to be but partially visible, 
and in some instances hardly to be traced through 
the brown bands which cross each of those segments, 
namely, a narrow band in front and a broad one 
on the hinder part, leaving between them but a small 
space of the ground colour ; on the last four segments, 
however, the lines are more distinct. At the end of 
the fifth segment on either side 1s a conspicuous 
round black spot near the subdorsal region, followed 
in some instances by another, a trifle smaller, on the 
end of the sixth. In segments five to nine inclusive 
the back of each bears the following details, composed 
chiefly of brown freckles, more or less confluent, viz. : 
