128 
THE entomologist’s RECORD. 
shade across between segments 13 and 14, and this, with other 
dark tinting laterally, gives an appearance of 10, ii, 12, and 
especially 13 and 14, having the yellow lozenges of the adult or 
a strong indication of them, the colour being yellower than 
the creamy white of 4th skin. The loth and 12th are 
sometimes very dark in this connection, and the front margin 
of the 2nd segment is yellow. The spathulate hairs are spread 
laterally instead of being erect as in the previous skins ; these 
hairs are really spathulate as in the other skin, though smaller, 
much more so than is occasionally to be seen in an unusually 
fine larva in 4th skin. 
The length of these hairs will give some idea of the relative 
development in this respect, and will also show that the extra- 
inoulter produces a larger adult larva than normal. 
Lengths of spathulate hairs : — 
A large fine 4th skin. 
Extra fine 
4th. 
Extra moult 
5th. 
Adult (5th). 
I Adult (6th), 
extra moulter. 
On 2nd segment ..3|:mm. 
3 \ mm. 
34 mm. 
6 mm. 1 
7 mm. 
On 8th ,, „ 
2 „ 
3 
! 3a 5> 
4 ,, 
On I2th ,, 2^ ,, 
„ 
3 > j 
4 „ ! 
4f » 
It is to be noted that these larvae produced moths of both 
sexes, and further, that the variation is not hereditary. The 
memorandum, as to the ratio they presented to the normal 
form given above, was for 1888. Ova were obtained in i88g 
from these, but in 1889 not one example of this variation in 
moulting presented itself, either from the ova laid by the five- 
moulters or from the ordinary types. A note on this form will 
be found in the Ent. Mo. Mag., vol. xxiii., p. 226, and on the 
result of the broods of 1889, in the E^itomolo gist's Record, vol. 
i., p. 271. 
The other var. of larva, of which only one specimen occurred, 
appeared in 1889, and presented in its extra (5th) skin a form 
much more nearly resembling the usual adult form, at least in 
so far that it was on the whole dark, and had the 13 dorsal 
yellow marks. The head, instead of being black, had the dorsal 
half brown, as is usual in the 4th skin. The yellow patches 
are very pale as to their ground colour, but look dark, owing 
to the plates of the tubercles being a pale greenish or olive- 
brown. Thus that of the 2nd segment is brown, almost like 
the head ; segments 3 and 4 have each a double tubercle on 
either side (as in the other skins, but noticeable here owing to 
the colour differences) ; 5, 6, 7, 8, and 9 are very much alike, 
