THE GENUS ACRONYCTA AND ITS ALLIES. 
247 
in rumicis attitude, with a lateral bend at 6 and 9, but never 
curls right round as when younger. The head varies much in 
coloration, or rather in the extent to which the black yields 
to ochreous above, green in front, peach-blossom on the 
cheeks, and pinky-cretaceous in the ocellar region. In one or 
two, the head is black with a tawny spot on each vertex and 
a green line down each side of the clypeus. In another, the 
clypeus and a great streak on each side are green, there is a 
great patch of peach on each side of this, more again behind 
the ocelli, and a greenish-cretaceous patch behind this — the 
tawny vertex is large and has several subsidiary portions 
below, the black being reduced to a wide margin round the 
tawny patch extended a little below, and a black streak along 
the ocelli. In one specimen, the black is reduced to a few 
spots, the tawny above and the peach below are continuous — 
there is a black streak along the extreme margin of the cor- 
neous head below and behind. The rich pinkness of the peach 
colour varies a good deal, in many it is as rich as the patches 
in Thyatira batis. The dorsum of the 2nd segment, as the 
larva is at rest, looks to be part of the head, being of the same 
colour and texture, several hair bases in it being tawny, as is 
one on the head. The dorsal dark band is now quite con- 
tinuous with a definite margin, very broad in 2, 5, 8 and g, and 
so narrowed in 6 and 7 as to include only the anterior trape- 
zoidals. These tubercles are all black with tawny tips. The 
tubercles elsewhere are green with, in some places, a wash of 
Indian ink, so as faintly to' indicate them by a different tint. 
The trapezoidals and supra-spiraculars have each one black 
hair, a primary one, and several smaller secondary ones also 
black, of which one is often larger than the rest, thus the first 
secondary hair on the 6th anterior trapezoidal is larger than 
the primary one on ii. The post-spiracular has several hairs, 
one of which looks dark in some lights, the sub-spiracular and 
marginal have each several long pale hairs, of which it is 
difficult to say that any one in particular is the primary one. 
The posterior trapezoidals of 5, 8 and g and all of 12 are 
especially large, this results in a suggestion of a hump on 5, 
chiefly due to attitude, and a decided one on 12. The dorsal 
mark is faintly margined by yellow, rapidly shading into the 
green sides, there is an indication most marked on 10 and ii 
of a tawny (paler) dorsal line, and this continues as a darker 
(deep purple) narrow line down the green posterior portion of 
I2th, and the green 13th and 14th segments. The rest of the 
