5 



viii List of Illustrations. 



PAC3 



26. Web of linyphia Communis 59 



27. Pholcus swinging 61 



28. Round Web of Epeira Vulgaris .... 62 



29. Web of ZUla 65 



30. Web of Nephila Plumipes. From Wilder . . 66 



31. Part of Web of Nephila, to show the smooth 



threads. From Wilder. .... 67 



32. Epeira Spinea . .... 69 



33. Spinnerets of Amaurobius 72 



34. Calamistrum of Amaurobius 73 



35. Dictyna spinning Curled Web . . • 73 



36. Part of Web of Amaurobius 74 



37. Part of Web of Dict\Tia, showing regular arrange- 



ment of threads . .... 



38. Unfinished Web of Triangle Spider. From Wilder . 76 



39. Finished Web of Triangle spider, and Spider hold- 



ing the Web. From Wilder . . 78 



40. Young Lycosa flying Si 



41. Fl)-ing Spider with a Thread attached to the Grotmd . S4 



42. Large Attus flying by a Brush of Threads . . S5 



43. Male and Female Xephila Plumipes. From Wilder, 



in Proceedings Boston Socier.- Natural History . 7S 



44. 45. Heads of irales of Several Species of Erigone 88, 89 

 46. Palpal Organ of Mygale . . 8g 



47- Palpal Organ of Epeira 90 



48. Palpal Organ of Theridion 91 



49- Epig}-num of Epeira Riparia 92 



50. Epigj-num of Theridion 93 



51- EpigjTium of Theridion 94 



52. Copulation of Lycosa 95 



53. Copulation of Lin3'phia . ... 96 



54. Copulation of Agalena .... 96 



55. Copulation of Epeira Riparia 97 



56. Drassus laying Eggs 99 



57. Lycosa carrying Cocoon attached to her Spiimerets . 100 



58. Attus Mystaceas laying Eggs ..... loi 



59. Epeira Strix making Cocoon loi 



