130 Mr. I’, Merrifield’s Report of Progress in 
last summer and autumn, the food in them dried up 
very rapidly, and [| provided the sides with coverings of 
varnished paper. ‘The effect of these was that water 
usually stood in drops about the glass inside and some- 
times van down the sides, but the larvie seemed none 
the worse for this. he dwarf sleeved trees were pro- 
tected from birds, &ec., by a eylinder of 4-in, wire- 
nothing, with w hinged top of the same, and from slugs 
by an outer ring made of a strip of perforated zine 6 in. 
wide, any slugs within the ving being caught by greased 
cabbage-leaves, When my first sleeved brood was 
roared L put the oges in the sleeve to hatch, but | after- 
wards adopted the plan of hatching them indoors, and 
putting the young larvie in the sleeve when a few days 
old, 1 judged it best not to crowd together young larvie 
of different ages; Lam not sure the larger ones do not 
under such circumstances sometimes eat the little ones. 
By the time they have changed their second sking no 
niturally solitary larvie can be more tolerant towards 
one wnother, Tlaving made these explanations, L will 
shortly describe what happened to each successive brood, 
referring also to the tabular statement appended, 
Second generation (first summer brood), Irom the 
90 oges L roared 84 male and 28 female moths, together 
67, none of them being cripples. ‘The eggs were rather 
more than three weeks hatching; the larval period 
avoragod 88 days; the pupal period of the first moth 
that emerged was 13 days. ‘The pupiw were forced from 
the time the first moth appeared——Lbth July-and the 
last came out 25th July. May and the early part of 
June wore very cold and dry. 1 paired off 9 couples, 
7 of which laid fertile eves. Lbred from the largest pair 
(A) w medium-sized pair (M) and the smallest pair (7). 
Third generation (A 1, M1, Z1).—Chese egeas hatched 
in Tors days ; bho larva averaged 50 to 60 lays in 
feeding up. Lt have obtained from them the following 
pup, now passing the winter out-of-doors, of Ad, LOL; 
of Mi, 64; of Z1, 60. As the sleeved food was in 
dangor of falling short, on the 18th September, when a 
fow wore boginning to spin up, I transferred the larvie 
from tho sleeves to breeding-cages ; and on the 15th 
October these breoding-eages were brought indoors to 
hurry on the remaining larvie before thei food-supply 
should fail, All wore in pupa by the 25th October, 
