147 
After the leaf becomes a little more expand- 
ed, their abode through a fine day is on the 
upper side of the leaf ; and towards the close of 
tlie day, or at the approach of rain they retreat, 
among the spurs, joints, and under the rugged 
bark of the bush, and amongst the union of the 
leaves, and sometimes numerously under dry clods 
of the earth in the vicinity of the bush. Thus 
they are alternately animated by light and heat, 
and i-elapsed by rain, cold, and darkness, till 
nature calls for them to relinquish their former 
pursuits, to establish the ova of their successor 
in those retreats or retirements which they them- 
selves had previously possessed, after which they 
immediately give up, retire into the earth, and 
other places, and die. It do(!S not appear 
from the first of their coming into existence (at 
the latter end of February to the fore end of 
June), when the egg is deposited, that there is 
any increase, nor are there any of the Spiders 
existing’ from the latter end of June till the above 
embryo is influenced to break forth into anima- 
tion. It appears, from the above observations, 
that we have only one brood in one year from 
this species, while the A, Tellur ius on Peach 
trees, and the species that infest Apples, are pro- 
genitors of several generations. 
The pernicious effects commonly produced by 
this ravenous insect are very considerable, espe- 
cially when the spring’ months prove warm and dry, 
an extreme which was produced in the spring of 
