Notes in 1887 upon lepidopterous larve, éc. 555 
2. THe Ontogeny or Aaiia TaAv.—My attention was 
first directed to this species through the kindness of 
Mr. William White, who showed me some preserved 
larve of different ages in his possession. The immense 
difference between the young and the mature larve,— 
the forked caudal horn in the former, considered in 
relation to the general spinous covering of many larve 
on the one hand, and on the other to the forked horns 
of young Sphinx larve, which are placed in precisely 
the same position,—the terrifying marks of the older 
larve,—were some of the interesting points suggested 
by the examination of Mr. White’s specimens. 1 there- 
fore determined to work out the ontogeny of this species 
of larva as soon as the opportunity permitted. Il 
obtained twelve living pupe in the autumn of 1886 from 
Messrs. Watkins and Doncaster, and I was also supplied 
with living ova from the same quarter in 1887. Dr. F. 
A. Dixey consented to take half of these ova, and the 
larvee which hatched from them were reared by him ; so 
that I have the satisfaction of knowing that my results 
are confirmed by those obtained by this careful observer. 
In the following account especial attention will be paid 
to comparison with the known ontogenies of Sphinx 
larvee. 
Halits of the moths in confinement.— Although this 
species belongs to a group in which the males ‘‘assemble,”’ 
I found it very difficult to induce the moths to pair. In 
many cases the males and females emerged at nearly 
the same time, and ultimately died without having taken 
any notice of each other. In one single case, however, 
I found two moths paired, about 3 or 4 a.m., but they had 
separated a few hours later. The relative development 
of the male antenne seems to indicate that their habits 
must be very different in the wild state, and it is probable 
that the freshly-emerged female is scented from a very 
great distance by means of these highly specialised 
sense-organs. Dr. Dixey has also noticed very similar 
facts in the captive imagos of Saturnia carpini. 
Ova.—In addition to the purchased ova, I obtained 
about sixty eggs from the single fertile female mentioned 
above. These were laid as follows :—April 15th, 2; 16th, 
4; 17th, many; 18th, many; 19th, a few; 20th, the 
moth died. 
The ova were of very large size, being about 2°5 mm. 
TRANS. ENT. 80C. LOND. 1888.—PaRT IV. (DEC.) 2P 
