Notes in 1887 upon lepidopterous larve, dc. 568 
white subspiracular line, which is composed of prominent 
fleshy lobes, a white area extends into the ground colour, 
over a segment of a circle. In the centre of this area is a 
dark reddish patch, which is usually slightly invaginated, 
and therefore hidden during rest behind the lobed upper 
margin of the subspiracular line. When the larva is irri- 
tated, increased contraction of the body-walls produces 
greater pressure upon the fluid contents of the body, and 
unfolds the shallow pouch-like invagination behind the 
lobes, thus exposing a greater surface of the white area, 
and rendering the dark centre visible. I observed that 
one larva in this stage possessed only the slightest 
trace of the terrifying mark upon one side, while it 
was entirely absent from the other. The size of the 
dark centre varies greatly, and when least developed no 
red pigment is formed, but a dark green centre is 
enclosed by a pale, whitish border. It will be remem- 
bered that the first appearance of the terrifying marks, 
in relation to the white subdorsal line, as described by 
We'smann (i. c., Plate IV. and description), in the larve 
of Cherocampa elpenor and C. porcellus, is strikingly 
similar to that in Agha tau. The differences chiefly 
follow from the arrangement by which the eye-like 
marks are concealed in the latter species, except when 
they are actually needed. 
The terminal fork on the five spines is not so marked 
in this stage, and it becomes less so in the next. Ina 
small proportion of the spines in this stage, and a much 
larger proportion in the next, the fork is entirely absent. 
This does not necessarily take place in both spines 
of either thoracic pair. Sometimes the result is due to 
the end having been nibbled or injured in some other 
way, but this is by no means always the case. 
The larve varied from 15°5 to 17° mm. in length 
at the end of this stage, when resting before the 2nd 
ecdysis. 
The 2nd stage lasted for about nine days in the 
majority of cases, about three days out of this time 
being occupied in the rest before the change of skin. 
Stage I1I.—The larve are, as usual, about the same 
length at the beginning of this stage as at the end of the 
last, attaining an average measurement of about 16 mm. 
The appearance is almost identical, and the attitude 
and position exactly so. Some slight differences have 
