116 AOIDALIA MANCUNIATA. 
ing in A. mancuniata, but in one variety it is replaced 
(though in a different position) by two distinct white 
chalk-like marks; ventralsurface as in A. subsericeata. 
At the time I had my larve, my friend Mr. J. P. 
Barrett, of Peckham, also reared a brood of A. subse- 
riceata, and as his notes differ slightly from my obser- 
vations, I append them. In a letter dated October 
25th, 1870, he says :—‘‘I received a drawing of 
A. mancuniata trom Mr. Doubleday this morning, “and 
should like to know whether your notes agree ‘with 
mine. The figure was taken by Mr. Buckler in 1865 
from Dr. Knages’ larve. I think it is of a darker 
brownish tinge in general than my A. subsericeata, and 
the black dots are more conspicuous. The last see- 
ments are paler than the others, but appear to want the 
yellowish tinge that A. swbsericeata possesses. In 
other respects I can see no difference either in size or 
shape.” On receipt of this letter I forwarded my A. 
mancuniata larvee to Mr. Barrett for comparison with 
his A. subsericeata, and in a letter dated October 28th he 
says: ‘‘I am now quite satisfied that there is but very 
slight difference between the larve of A. mancuniata 
and A. subsericeata ; I believe that you would scarcely 
be able to pick out the paler larva you sent if it were 
placed in a batch of A. subsericeata. The chocolate- 
brown one might readily be distinguished, but I should 
not be surprised 1f A. swbsericeata varies similarly. 
You mention in your notes that the larve of A. man- 
cuniata are, perhaps, more slender than A. subsericeata. 
I have noticed that in this respect my larve varied 
considerably, but Iam scarcely prepared to say, though 
I suspect such to be the case, that the more slender 
larvee produce the smaller insects, viz. the males. The 
figure before mentioned’’ (Mr. Buckler’ s) “is taken 
from a larva as stout as any I have had. The chief point 
of distinction that I have noted is the ochreous marking 
on the latter segments, and with respect to this it varies 
much in intensity. A batch of larve that I had last 
year, belonging to A. subsericeata, scarcely possessed 
