THE GENUS ACRONYCTA AND ITS ALLIES. 
245 
broad enough to include them. This is not visible in a direct 
dorsal view, but is quite distinct on viewing somewhat from 
one side. It is very distinct on 3, 6, 7, and the anterior half 
of 10 ; traces of it also exist on the margins and angles of 
the dark parts of the dark segments, most clearly on 4, 
where the dark mark is rather narrower, and against the dark 
hind margin of ii, it is also to be traced as a very narrow 
line across 10 and ii. On the dark segments, where it is 
invisible, it appears to be overlaid by the dark area. The 
trapezoidals and supra-spiracular tubercles have each one 
dark hair ; those of the other tubercles, the secondary hairs, 
and also the hairs of ii are white. The general tint is much 
dominated by the green intestinal contents. Tridens at this 
stage is a dark larva with abundant markings, etc. July 30th. — 
Several have entered the 3rd skin and present an aspect very 
similar to the ist and 2nd. Head on first moulting is quite 
white, except jaws pale brown. August ist. — The majority 
are now in the 3rd skin. In 3rd skin, they are still satisfied 
to leave one cuticle of the leaf, whilst tridens of the same age 
eats the whole thickness of a cherry leaf. Each larva likes to 
get a leaf to itself, and prefers the upper side. Length newly 
changed, 3^4 mm. ; full-fed, 6-7 mm. The sides are now pale 
glassy-green, the dorsum presents a nearly continuous dark 
(blackish-brown) stripe ; this is the dark marking of the 
dark ” segments almost unchanged in extent, but darker, 
and reinforced by dark markings on the pale segments, on 
these, the dark dorsal band is narrower, not including the 
posterior trapezoidals as it does on the dark ones. It is inter- 
rupted across the incision between 2 and 3, on 3 and 4 it 
includes the dorsal tubercles (conjoined trapezoidals ?), on 6 
and 7 it is continuous, on 10 it is nearly interrupted behind 
the anterior trapezoidals, and has a lateral wing passing 
behind posterior trapezoidal, the colour on this and ii is paler 
than elsewhere; on ii it forms a double patch, one to each 
anterior trapezoidal with a green line between, and includes 
also the posterior trapezoidal (as it did from ist skin). 13 and 
14 are quite transparent and colourless, the white sub-dorsal 
band now margins the dark dorsal band, i.e,, it is nearer the 
dorsum where the dark band is narrower and is not continuous 
through 6 and 7, being interrupted by the large green pos- 
terior trapezoidal tubercles, it is continuous round segment 12, 
behind the large dark boss of tubercles. 5, 8, g and 12 look 
larger than the other segments owing to their dark area being 
