viii List of Illustrations. 



VA.CS 



26. Web of Linyphia Communis 59 



27. Pholcus swinging 61 



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



29. Web of Zilla 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 Dictyna, showing regular arrange- 



ment of threads 75 



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 8 1 



41. Flying Spider with a Thread attached to the Ground . 84 



42. Large Attus flying by a Brush of Threads . . 85 



43. Male and P'emale Nephila Plumipes. From Wilder, 



in Proceedings Boston Society Natural History . 78 



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



46. Palpal Organ of Mygale 89 



47. Palpal Organ of Epeira 90 



48. Palpal Organ of Theridion 91 



49. Epigynum of Epeira Riparia 92 



50. Epigynum of Theridion ...... 93 



51. Epigynum of Theridion ...... 94 



52. ^Copulation of Lycosa 95 



53. Copulation of Linyphia 96 



54. Copulation of Agalena 96 



55. Copulation of Epeira Riparia 97 



56. Drassus laying Eggs 99 



57. Lycosa carrying Cocoon attached to her Spinnerets . 100 



58. Attus Mystaceus laying Eggs lot 



59. Epeira Strix making Cocoon lol 



