AOIDALIA SUBSERICEATA. 115 
line, bordered on each side with an equally narrow 
dark line; dorsally, on the anterior part of the ninth 
segment, 1s a conspicuous rust-coloured mark, shaped 
somewhat like an arrow-head, the apex pointed ante- 
riorly ; there are a number of confused brown markings 
alone the spiracles, which are of a still darker brown ; 
usual segmental dots conspicuous, black ; the ground 
of the ventral surface is of a beautiful slate-colour, 
with a series of curiously-shaped dull black marks 
throughout its entire length, which give it a very 
pretty appearance. When at rest the food-plant is 
grasped by the claspers, the body stretched out at full 
length, the head being brought slightly forward, and 
tucked in amongst the legs. [For additional remarks 
and comparative notes see under next species, A. man- 
cuniata.| (George T. Porritt, November 4th, 1871; 
Knt., December, UST, V, 453. ) 
ACIDALIA MANCUNIATA. 
Jel, (Cex WITTE: siyee, Sip 
The following comparative notes on the larve of 
these species or varieties | A. swbsericeata and A. man- 
cuniata | may, perhaps, prove interesting. For the 
opportunity of comparing the two I am indebted to 
the kindness of the Rev. J. Hellins, of Exeter, who 
sent me the larve in July, 1870. They fed on Poly- 
gonum aviculare, and on August 25th I described 
them as follows: 
A. subsericeata [see under that species ]. 
A. mancuniata :—In habits and shape precisely like 
A. subsericeata, but perhaps a trifle more slender; 
eround colour dark brown, strongly tinged with choco- 
late, and without the ochreous markings so conspicuous 
on the eighth and ninth segments in A. subsericeata ; 
head marked as in that species, but duller in appear- 
ance; dorsal line also similar to A. subsericeata, but the 
rust-like mark so conspicuous in that species 1s want- 
