The Life of Spiders 



The simplest kind of an egg-sac is merely a mesh of threads 

 holding the mass of eggs together; but so delicate that the eggs 

 can be seen through it; such an egg-sac is made by Pholcus (Fig. 

 320). Other spiders, as some species of Aranea, enclose the eggs 

 in a fluffy mass of silk which effectually conceals them, but which 



Fig. ig7. EGG-SAC OF MIRANDA AURANTIA 



has no definite outline. While still others make an egg-sac of 

 a very definite form and consisting of several layers of silk, differ- 

 ing in texture. The egg-sac of Miranda aurantia (Fig. 197) is 

 a good illustration of this type. If one of these be opened it will 

 be found that the eggs are enclosed in a silken cup, which is 



209 



