562 Notes in 1887 upon lepidopterous larve, éc. 
The first stage was very unusually long. I was able 
to calculate its exact length in the case of several larve 
with the following results :— 
In 2 larve the stage lasted for 14 days. 
oy 1 99 S 4 15 days (the rest before ecdysis occupy- 
ing 7 days). 
” 3 ” ” ” 15—16 days. 
” 7 ” ” 
5 16 days (the rest before ecdysis occupy- 
ing 8 days in the case of 4 larve). 
» 10, 9 over 16 days. 
Hence it seems that 16 days is the most usual duration 
of the first stage, but nearly half this time is spent in 
the extraordinarily protracted rest before ecdysis. It 
therefore follows that the time spent in growth is by no 
means unusual. The larve at the close of this stage 
are between 10 and 11 mm. in length. 
Stage II.—Several larve were measured immediately 
after the first ecdysis, and the length was found to be 
very uniform, not varying more than °75 mm. The 
average length was 10°5 mm. 
The old skin is eaten. On one occasion I saw a larva 
nibbling the cast skin of one of the spines; the upper 
red part and a portion of the white zone were eaten. 
Immediately after change of skin the head and spines 
are pale, although otherwise of the usual colour; they 
rapidly darken after exposure. 
~The colour and marking in this stage are almost iden- 
tical with those of the last; and the Sphinw-like attitude 
is equally characteristic, as well as the position on the 
undersides of leaves. The most important difference is 
the appearance of shagreen dots, exactly like those of 
Smerinthus and Sphinx, in which these structures also 
become prominent in the second stage. A further 
resemblance is shown in the fact that each shagreen 
tubercle is terminated by a short bristle with a clavate 
end. The abdominal segments become more strongly 
marked off by an increased prominence of the transverse 
ridge upon the dorsal aspect of each of them. The 
upper and anterior part of each oblique white stripe is 
bordered posteriorly by a darker shade of ground colour 
(green). ‘The first traces of the terrifying marks which 
become prominent in later stages, now appear, but they 
are probably absent at the beginning of the second 
stage. Upon the Ist abdominal segment, above the 
