INSECT ENOINEERING. 305 



paper boxes laid along the table, and which thus formed 

 a series of piers and abutments. They had already 

 woven a sheeted way, several inches wide, that stretched 

 above the middle of the table for five feet. Thence it 

 spread upward to the window curtain iu diverging 

 threads, among which many of the wee adventurers 

 hung (Fig. 69.) I kept the bridge for several days, dur- 

 ing which time the "roadway" received many addi- 

 tional strings, and some of the baby bridge-builders 

 spun delicate little cob-webs along the edges and among 

 the trusses of their l^ridge, and separatinof themselves 

 from their fellows, set up housekeeping for themselves." 



