Notes in 1887 upon lepidopterous larve, de. 517 
size, when considered in relation to that of the adult 
larva and the perfect insect. The two main axes of the 
ovum measure respectively 1°3 and 1:15 mm., while 
those of the closely-allied but much smaller S. ligustri 
measure 1°75 and 15 mm. (See Trans. Ent. Soc. 
. Lond., 1885, p. 281). (I may here call attention to an 
absurd misprint in this description of the ovum of 
S. ligustri: on the 12th line from the bottom of the 
above-quoted page, the word sexes has been substi- 
tuted for axes). Mr. Hellins also states that the ovum 
is not more than two-fifths of the size of that of 
S. ligustri. 
Stage I.—Times of hatching.—The first larva emerged 
on the evening of Sept. 5th, the second on the morning 
of September 7th. On the 8th, examination with the 
lens showed that the larve were fully formed in the 
remaining ova, which appeared somewhat wrinkled. I 
was therefore afraid of the larve dying before hatching, 
and accordingly, in the evening, the ova were placed in 
a room with a fire, in order that the moderate warmth 
might hasten emergence. By the next morning (9th) 
eleven larve had emerged, and the remaining four 
appeared a few hours later, in the afternoon, thus 
making seventeen larve altogether. One of the eggs 
did not undergo development, but subsequently changed 
colour and dried up. 
The length of time occupied in development within 
the ovum was therefore as follows :— 
1 larva, 7 days. 
11 larve, rather over 10 days. 
fase » under 11 days. 
17 
Hence the development is at about the same rate as 
that of “S. ligustri, which occupied 8—10 days (Trans. 
Ent. Soc. Lond., 1885, pp. 281, 282). Mr. Hellins 
(J. c.) puts the time of development at ‘‘ rather less than 
three weeks.” This is probably a mistake. 
Amount of egg-shell eaten.—The habits of the larve 
must vary excessively in this respect, as was also the 
case with S. ligustri (l.c., p. 282). Of the 17 empty 
ego-shells, three had become detached from the paper 
(probably in the post). Of the remaining 14 :— 
