118 



FIRST BOOK OF ZOOLOGY. 



will grow to twice their size in the nest, without apparent 

 food, and it becomes evident that, in some cases, they 

 must eat each other, as Prof. Wilder has observed within 

 some of the egg-cases a far less number of spiders than there 

 were eggs in the nest at the outset. These nests may be 

 kept in boxes, and the eggs will hatch in due time. 



AEG 



FIG. 112. SPIDERS' NESTS OF DIFFERENT KINDS CONTAINING EGGS. A and C are common 

 nests in sheds and barns; B was found under a. board in the field, the part containing the 

 eggs stands upon a stalk. 



109. The young spider comes from the egg resembling in 

 form the parent spider, except that the legs are much shorter 

 in proportion to his relative size, and the palpi appear so 

 large that they look like another pair of legs, as they then 

 are in fact, but they afterward become modified to feelers. 



FIG. 113. ENLARGED FIGURE OF A YOUNG SPIDER JUST FROM THE EGG, WITH THE FIRST 

 MOULT, m, adhering to the Hinder Part of the Body ; y, the Natural Size of the Spider ; I, 

 extremity of a Leg highly magnified, showing an Outer Skin which has not been shed. 



