602 Notes in 1887 upon lepidopterous larve, cc. 
bristles. The thorny tubercles covering the surface are distinctly 
shown. The colour is black, with a light semi-transparent zone 
near the tip. In this respect the horn resembles that of the young 
Aglia tau, the red pigment being absent from a similarly placed 
zone in this species (compare Plate XVII., figs. 8 and 4). 
Figs. 10, 11, 12, and 18, all x 3. These four figures represent 
different varieties of the larve, rather more than half-grown in the 
3rd stage; all seen from the right side. The larve figured are 
indicated in the paper. They were chosen to represent a transition 
from one of the lightest larve of this stage (fig. 10) to the darkest 
(fig. 13). The former is seen to be extremely Smerinthine in appear- 
ance, possessing the characteristic red spots, and very little pigment 
except upon the horn. The traces of dark borders to the stripes 
above the subdorsal line are noteworthy. In fig. 11, the amount 
of pigment has greatly increased in depth and extent; the dark 
borders tend to pass anteriorly along the upper margin of the sub- 
dorsal. In these two larve the light zone on the horn is marked. 
In fig. 12, the borders have exteyded along the subdorsal, thus 
shutting off a dorsal area of ground colour, which becomes of a 
deeper green. In fig. 13, this area has become suffused with dark 
pigment, of which the depth diminishes towards the dorsal line. 
The larva is very dark as compared with the others, the head and 
anal region being especially black. The larva represented was the 
darkest of all in this stage. 
The change in tint of the ground colour of the larve, from 
bluish green in the palest larve, through intermediate tints to 
yellowish green in the darkest larve, is very remarkable. 
The shagreen dots are not represented in the figures. The dark 
mark between the 2nd and 3rd thoracic segments apparently com- 
pleting the series of spiracular marks, into a system with equal 
intervals, is especially noticeable in figs. 10 and 11. The head has 
now assumed a more characteristic shape. The caudal horn 
is straight. 
Fic. 14, x 5°25. The same larva as that represented in fig. 13, 
seen from the left side and above, in a somewhat curved position. 
This was much the darkest of all the larve in the 3rd stage. _ The 
broad dark dorsal band is a very striking feature, of which not a 
trace is visible in the paler larve (fig. 10). The shagreen dots are 
represented in this figure. Two of the chief tubercles (from which 
the chief bristles spring) of the first stage (fig. 2) are seen upon 
each abdominal segment, one being above and one below each 
spiracle, except upon the 8th segment, in which one is above and 
one behind the spiracle. The others are also present, but less con- 
spicuous, so that they could not be shown in the figure. The 
