Entomology. 655 
the approach of a vibrating fork seemed to cause a greater alarm, 
making them drop from the web and keep out of sight for a longer 
or shorter time. However, after one of these spiders had been 
subjected to the experiment several times, it would, instead of drop- 
ping, raise its legs in the manner described above. 
“A few experiments were made to determine where the organ of 
hearing was located, but we can offer nothing positive on this ques- 
tion. It seems probable that the auditory apparatus is but little 
specialized, Possibly it is spread over a considerable portion of the 
epidermis, 
. She at once went to the eggs and 
touched them with her legs. She then left them, to improve her 
“Se 
their cocoons for twenty-four hours; yet these spiders, although 
they do not carry the egg-sack around with them, remain near it for 
from fifteen to twenty days.” 
bearing on the sense of sight, they state: “We have fre- 
quently, while feeding our captives, seen them stalk their prey at 
# distance of five inches; and we have repeatedly held the active 
Jumping-spider, Astia vittata, on one finger, and allowed it to jump 
on to a finger of the other hand, gradually increasing the distance 
vP to eight inches. As the distance increased the spider paused 
ar a before springing, gathering its legs together to make a good 
“We have twice seen a male of this species chasing a female 
"pon a table covered with jars, books and boxes.. The female 
a leap rapidly from one object to another, or would dart over 
ti edge of a book or a box so as to be out of sight. In this posi- 
ae: she would remain quiet for a few minutes, and then, creeping 
the edge, would peer over to see if the male were still pursuing 
