AERONAUTIC SPIDERS 



GATHERING IN THE BUOYING LINES 



The way ballooning spiders regulate their descent 



upon which the orbweaver spins her geometric snare, 

 sometimes thereby bridging a brook or creek or country 

 road with her dainty, laceUke web. In the same way, 

 some individuals have been known to sail over the sur- 

 face of water by setting loose several long filaments 

 which, floating above the creature's back, act as a sail. 

 The wind playing upon these streamers diives the voy- 

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