LEPIDOPTEROUS PUP2E AND THEIR SURROUNDING SURFACES. 
357 
of the large cylinders in which the stock was kept. At this time, therefore, the 
arrangements for transference were made. Between 2.30 and 3.15 p.m. 17 larvse 
were placed in a large cylinder covered with one layer of black tissue-paper, and with 
a black floor, the whole being covered with two black opaque mats and placed 
on the floor in shadow (this is II. of the Table below) ; 12 larvse were placed in each 
compartment of the gilt box, arranged as usual (IV. below), and 12 more in another 
gilt receptacle (also IY. below), of the following construction. I covered a cylinder 
(U86 decimetre in internal diameter and 8 centimetres in height) with gilt paper, 
and covered it with a gilt-paper roof. The cylinder was placed on its side, with its 
open end facing the light, and therefore a segment of the side formed the roof, while 
the back was formed by gilt paper (which would have been the roof in the other and 
usual position of the cylinders used in these experiments). The open front was 
closed by a plate of clear glass. This gilt cylinder was made use of in many other 
experiments, and will be always spoken of shortly as the “ gilt drum.” Another 
large cylinder was covered with two layers of black tissue-paper, with a black floor, 
and placed in shadow (I. below), and into this many of the larvse from the “ gilt 
drum ” and box were transferred at the beginning of Stage III. When transferred, 
the larvse were in nearly all cases pinned by the boss of silk, to which the posterior 
claspers’ adhered. The experiments, together with their results, are given in a 
tabulated form below :— 
