“- 
Pedigree Moth-lreeding. 131 
Borin Ina. Second gencrvation.VThese were 
brought up on eut food in Bordeaux plum bottles, covered 
with sal plate-glase being laid over the top and slid 
away when the moisture inside the glass was excessive. 
The 90 eggs were three weeks in hatching; the larval 
perce averaged 80 or $1 days, the pupal 14 days. | 
wed 31 males and 82 females, together 63; no cripples. 
They were distinetly larger than the sleeved ones. 
When the larve were about half-grown (on 16th June) 
I transferred half of them to an outdoor breeding- cage. 
I'he only difference J found in the mothe so treated was 
that they were about two days later, and were smaller, 
viv., the male averaged 17°60 instead of 17°70, the 
females 19°00 instead of 19°50. The weather was so 
warn most of the time that there could have been little 
difference in temperature between the two batches; but 
it was very dry weather out-of-doors, while in the 
bottles a moist atmosphere prevailed, J did not think 
it necessary to continue this brood. 
Foncny Lawnants.—Prelmnary.—Vhe foreing boxes 
were two, their inside dimensions about 24” by 1’ 8”, 
and 2’ in depth. hey were of wood, with glazed lida 
set on @ slight inclination forwards, and ventilation 
capable of being closed, and were warmed at the bottom 
by w zine cistern, under which was a gas-jet. One had 
glass also in front and partially at the ends. The 
temperature was generally from 70° to 80° Vahy., but 
occasionally (more especially when the sun shone into 
the room in the afternoon) it rose to 90", and sometimes 
at night it fell to 60°. In the summer it was generally 
some 15” higher than the air of the room. Until the 
lavva were about half-grown, and sometimes till they 
had spun up, the forced larve were brought up on cut 
food in bottles, or elee in glaws cylinders having # 
sloping sheet of muslin at the bottom, with a hole in it 
for the neck of a bottle containing food. When half. 
grown they were generally transferred to breeding-cages 
placed in the forcing-box ; in both cases the atmosphere 
was quite # moist one. The forcing did not begin till 
28th May, when the eggs laid by the wild-bred mothe 
were on the point of hatching, 
Second genvrationn—Vrom the 9L eggs J reared 25 
male and 43 female moths, together 54; no eripples. 
K Z 
