n4 



PROCEEDINGS OF THE ACADEMY OF 



[1881. 



Some of the striking differences I have also recorded, and they may 

 thus be summarized. The web of Hyptiotes is a single sector ; that 

 of Radiosa has four or more, united. Hyptiotes commands one 

 line with her feet, the trap-line and its continuation ; Radiosa 

 commands several axes, which are connected with, but not con- 

 tinuous of, the trap-line. Hyptiotes has her head, Radiosa her 

 abdomen towards her snare. Hyptiotes habitually hangs to the 

 trap-line, back downward ; Radiosa generally sits upon a foot- 

 basket of lines, back upward. Hyptiotes shoots forward when 

 her net is sprung ; Radiosa shoots backward — but both spiders 

 move toward their webs. Hyptiotes holds her slack coil between 

 the two hind-feet (apparently) ; Radiosa between the fore-feet. 

 In these differences, the points wherein Radiosa varies from 



Fig. 1j.— Full-Orb snare of Epeira domiciilorum. 



Hyptiotes show a quite apparent approach to the behavior of E. 

 domiciilorum and the Full-Orb makers. Thus the distance which 

 heretofore had separated between the far-away extremes of the 

 spinning-work of the Orbitelarise, has been completely bridged 

 over by the industry of our little indigenous aranead — the Ra}' 

 spider. It is to be remarked that while structurally^ the Triangle 



