THE GENUS ACRONYCTA AND ITS ALLIES. 
243 
skin, the whole larva retains a pellucid transparency, to a 
degree much beyond any other Acronycta. The 3rd segment 
is somewhat opaque with a yellowish shade, the dark seg- 
ments 2, 4.5, 8.9 and 12, have the appearance as if the dark 
portion were really a plate laid on dorsally ; this aspect is 
assisted by the circumstance that the dark portion is dorsal 
only and is rounded at the angles, so that a pale wedge in- 
trudes between the dark portions of the adjoining dark segments 
4.5 and 8.9. The head is now densely black and shining with 
12-16 black hairs. The 2nd segment has a black plate with 
three black hairs on each side, two along the anterior margin 
and one towards the posterior angle ; on each side, below this, 
is a plate with two hairs, and lower, laterally, another with a 
large black hair and a shorter behind. Dorsally, and behind 
the plate, are, one on either side, a reddish-brown patch, or 
one might say, the rest of the segment is dorsally reddish- 
brown, divided by a colourless dorsal line ; 3rd segment 
colourless, dorsal tubercle with two hairs, 4th segment dorsal 
tubercles with two hairs. The dorsum around the tubercles, 
which are black, is rich red-brown, stopping short before the 
lateral tubercle which is in exact line with the supra-spiracular 
of 5th. The 5th segment is the same, except that four trape- 
zoidals, each black with one hair, are all included in the coloured 
area. 8 and 9 have the same large red lozenges including 
trapezoidal tubercles black. On 3, 6.7, 10. ii the tubercles are 
ust tinted with dark, getting blackish to the edges. On 12 
they are again black and a lighter shading of the dark area 
includes the supra-spiracular tubercles. 13 follows the rule of 
the pale segments with reversed trapezoidals (as usual) ; 14 has 
a pale plate, just tinted with fuscous, somewhat pyramidal in 
form, and carrying 8 hairs. The hairs are all black, the 
longest about one and a half the diameter of the larva. The 
iith segment requires fuller notice. The tubercles are very 
small and the hairs about half the length of the others ; at 
first view there are no posterior trapezoidal tubercles. On the 
other segments the large tubercles are angular and fit together, 
and even in the full-grown (in first skin) larva, are still in this 
obvious relation to each other, though floated somewhat apart. 
Here the anterior trapezoidals are minute and rounded, and 
no posterior trapezoidals are anywhere to be seen. There is, 
however, between segments ii and 12 what appears to be a 
narrow subsegment, rounded and cushioned like an ordinary 
segment ; this carries two minute tubercles with fine hairs, and 
