190 



NATURE SKETCHES IN TEMPERATE AMERICA 



constructed excepting at night. To see her mancEUvres during 

 the latter work, one will be more successful in making observa- 

 tions by artificial light. I found that in the vivarium some 

 materials, such as I have seen entering into the composition 





'1 lie castle of the spider is often made of various small stones, 

 bits of bark, and covered with Cencrus burrs. 



of nests afield, could be supplied by scattering them over the 

 ground close to the entrance to the newly-made tube. She 

 willingly adapted them to her nest, as I will presently describe. 

 One adult female which I had under observation came out 

 of her tube and selecting a prickly sphere of burr grass, she 

 carried it to her burrow where she adjusted it to the border of 



