310 OBSERVATIONS ON THE 
the same day as the foregoing individual, and was 
well fed, on the 13th of July, 1843, had moulted 
seven times. It is apparent also, from the particulars 
already stated, that the intervals between consecutive 
moults are much shorter when the temperature of 
the atmosphere is high than when it is low. 
Immature spiders infested by the larva of Poly- 
sphincta carbonaria, an insect belonging to the family 
Ichneumonide, which feeds on their fluids, never 
change their integument. 
Intimately connected with the renovation of the 
integuments is the reproduction of the limbs of 
spiders. For this interesting discovery we are in- 
debted to the late Dr. C. Heineken, whose imvesti- 
gations relative to the subject are published in the 
‘Zoological Journal,’ vol. iv. pp. 284 & 422; and I 
am happy to bear testimony to the general accuracy 
of his conclusions. 
The reproduction of the palpi and spinners does 
not appear to have been noticed by Dr. Heineken ; 
but that those members, after suffering mutilation, 
are restored in the same manner as the legs, I have 
proved by repeated experiments. That mutilated 
members are not always reproduced at a subsequent 
moulting, even when it takes place at a period 
considerably after the infliction of the injury, is 
rendered evident by the following remarkable fact. 
On the 13th of July, 1830, a male specimen of 
Ciniflo atroc had the palpus and the second leg 
