Rhopatocera from the Australian region. 177 
orange-orchards, upon which tree the larve feed. It is 
a weak insect on the wing, and mimics Acrea Andro- 
macha both in its general appearance and mode of flight. 
It appears from October to March, and, like P. erectheus, 
there is a succession of broods throughout the summer. 
The eggs are deposited on the tender leaves of the 
orange, generally upon the under side near the edge. 
They are perfectly globular, flattened beneath, and pale 
straw-colour. The young larva is very similar to that 
of P. erectheus, but when full-grown it is quite different. It 
is then 37 to 89 mm. long, somewhat short and stout, 
cylindrical, and tapers slightly towards the head. The 
whole surface deep blue-black, irregularly spotted with 
minute white and bluish dots; a dorsal row of rather 
large heart-shaped yellow spots; a subdorsal row of 
large yellow spots, irrecular in size and shape, with the 
exception of that on the fifth segment, which is round 
and very small; a subspiracular row of pale yellow 
linear-shaped spots from fifth to twelfth segments ; legs 
smoky black, the foremost pair with an orange spot at 
their base ; prolegs and ventral area brownish orange ; 
head black, with a faint \/-shaped mark on the face; a 
subdorsal row of short, blunt, black spines. When 
irritated this larva has the power of protruding a fleshy, 
bifid, orange-coloured tentacle from the nuchal aperture, 
upon the crown of the second segment just behind the 
head, at the same time emitting an unpleasant perfume 
of rotten oranges. 
Two small larve, taken October 18th, 1882, attached 
themselves to the stem of their food-plant on the 
evening of November 4th, changed to chrysalids during 
the night of the 6th, and on the 16th of the same 
month, at 8 a.m., two beautiful butterflies emerged. 
Before attaching themselves these larve voided a quantity 
of frass and fluid-matter, and shrunk to about half their 
natural size, and I was afraid some disease had attacked 
them. 
Papilio Lycaon, Westw. 
This elegant butterfly is not uncommon in the neigh- 
bourhood of Sydney, and I have met with it at New- 
castle, Cooktown, Thursday Island, and the south-eastern 
coast of New Guinea. It is more frequent some years 
than others. It appears from November to February. 
TRANS. ENT. SOC. LOND. 1888. PARTI. (MARCH.) N 
