LYMANTRIA AMPLA. 77 
In the second stage the colour is brown, darker dorsally 
throughout, with a bluish spot, faintly ringed with yellow, on 
each segment each side of the median line, while, in addition, 
on the sixth abdominal segment there is a median red spot 
ringed with black, and on the seventh abdominal segment a 
median black spot. The hairs are as in the first stage. This 
second stage lasts through only one instar. The maximum 
length attained is 30 mm. 
Third Stage——Colour coffee-brown. There is an inverted 
Y-mark on the clypeus. The junction of the pro- and meso- 
thorax bears dorsally a broad transverse dark velvety band, 
only visible when the segments are extended. There is a 
light median line on the three thoracic segments. On each 
segment is a dark brown hair-bearing papule each side of the 
median line, and on the meta-thorax and abdominal segments 
a similar but smaller pair of papules interior to and anterior 
of the larger pair. The larger outer papules are connected 
transversally across the segment by a dark line, which is 
complete on abdominal segments 4, 5, 6, and interrupted 
medianly on abdominal segments 2, 3, 7. On the three first- 
mentioned segments an inwardly directed dark line leads from 
in front of the larger hair papule to the anterior edge of the 
segment, but the lines from each side do not meet at the 
segmental edge. These lines are prominent only on segment 
5 of the abdomen. On the sixth and seventh abdominal 
segments is a small dark reddish horn-like process on the 
median line. On the anal segment are three additional hair 
papules. The anteriorly directed hair pencils from the pro- 
thorax are prominent. There are the usual lower rows of 
hair papules, those at the lateral position being larger than the 
others. This is the last larval stage, and is of one instar 
duration only. The length full grown varies with the sex, 
the male larve attaining a length of 20-30 mm. only (this 
last being exceptional, and found only in the case of one iarva, 
to be referred to later, which pupated in stage 2), while the 
female larve attain a length of 50 mm. with a corresponding 
increase in girth. 
Varieties in Larve—In one case | have found a larva, of 
normal appearance in stage 1, to appear in stage 2 with a 
