134 Journal of Entomology and Zoology 
Lycosti built neither web nor thread rope, but ran round and round 
the jar. No attempt was made to build separate homes or pro- 
tections. Pliippdiis after one day of outside life built small re- 
treats such as the mature build under the rocks. Of course, the 
nests were very small and thin, but they were exact duplicates of 
the large ones. Three or four little ones lived in the same retreat 
but more often each had his own. Comstock claims they use these 
nests as places to stay in while they moult. The nests were built 
along the upper edge of the jars and from the nest to the bottom 
of the jar was a line of silk thread used as an ele\ator. The trap 
door spiders stayed in the bottom of the tunnel except when placed 
in the sunshine; then they spread all o\er the sides of the tunnel 
and especially around the edge of the trap door. As a general 
thing the young were very slow and sluggish in actions. The young 
of the trap door spider must be very slow to de\elop for they 
showed no signs of silk spinning nor any desire to go out of the 
parental tunnel. Some of the young were removed when four 
months old and placed in a jar of dirt in order to see if they 
would form small burrows of their own. All of them refused to 
make any burrows and dried up on top of the dirt. The young 
of about one year of age were found in small burrows. Miss 
Thompson in her observations on the trap door spiders, says, 
"After the hatching of the eggs from seventy-five to one hundred 
black and green spiderlings will be found occupying the maternal 
nest. When these are a few weeks old they leave the native burrow 
and begin to excavate in sunny places, minute tubes of their own. 
Often a dozen such small abodes will be clustered about the old 
trap door. These \ary greatly in size but all are quite perfect 
in form." 
The actions of the young Arauea yemma were the most interest- 
ing of all the young. The instinct to use the spinnerets and to 
make webs was strongly developed, for as soon as the young 
emerged from the egg sac they began to spin. First a small thread 
was put out and attached to the sides of the jar and as soon as the 
young had found a suitable place an orb web was begun. These 
were very perfect, although not as large nor ha\ing as many com- 
plications as the web of the mature spider. Some of the young 
