Flying spiders, Erigone, 151. Lycosa, 68. Geotrecha bivittata, 8. crocata, 7. Gnaphosa brumalis, 3. conspersa, 2. Gossamer, 149. Ground spiders, Lycosidæ, 67. Drassidæ, 1. Habrocestum auratum, 43, 44. peregrinum, 45. splendens, 46. Hahnia bimaculata, 105. Hahnia cinerea, 106. Hairs, xi. Hasarius hoyi, 63, 64. Head, viii. Helophora insignis, see Linyphia insignis, 146. House spiders, xii. Hunting spiders, xv. Hyctia pikei, 62. Hyptiotes cavatus, 218. Icius elegans, 57, 58. mitratus, 57. palmarum, 56. Jumping spiders, see Attidæ, 41. Labium, x. Larinia directa, 182. Latrodectus mactans, 122, 123. Legs, viii. Linyphia, 134. bucculenta = trilineata, 143. coccinea, 140. communis, 138. concolor, 147. insignis, 146. mandibulata, 139. marginata, 136. minuta, 144. nebulosa, 143. nigrina, 147. phrygiana, 141, 143. socialis, 145. trilineata, 143. Linyphiadæ, 134. Lungs, x. Lycosa carolinensis, 73, 74. cinerea, 73, 74. communis, 75. kochii, 74. nidicola, 69. nidifex, 70, 72, 73. Lycosa ocreata, 77. polita, 70. pratensis, 69. scutulata, 76. Lycosidæ, 67. Lyssomanes viridis, 65. Mævia vittata, 59. Male spiders, xi. Mandibles, viii. of Tetragnatha, 203, 204. Markings, xi. Marptusa familiaris, 61. Marx, George, list of spiders of North America, viii. Maxillæ, x. Meta menardi, 190. Metatarsus, viii. Micaria aurata, 8. longipes, 8. Mimetus interfector, 132. Misumena, 25. Names of spiders, vii. Neon nellii, 47. Nests of spiders, xiv. Number of spiders, vii. Ocyale undata, 88. Oxyopes salticus, 88. viridans, 89, 90. Palpal organ, xi. Palpi, viii. Pardosa, 78. albomaculata = greenlandica, 79. albopatella, 83. brunnea = glacialis, 80. glacialis, 80. greenlandica, 79. lapidicina, 78. montana = tachypoda, 81. nigropalpis, 82. Pardosa pallida, 81. tachypoda, 81. Patella, viii. Pellenes, see Habrocestum, 44-46. Peucetia, see Oxyopes viridans, 89, 90. Phalangium, 128. Phidippus multiformis, 48, 49. mystaceus, 50. tripunctatus, 51. Philodromus, 35. lineatus, 37. ornatus, 36. pictus, 37. vulgaris, 35. Pholcus phalangioides, 128, 129. cornutus, 130. Phrurolithus alarius, 9, 10. Pirata piraticus, 84. Plexippus puerperus, 52. Pœcilochroa variegata, 4. bilineata, 4. Poison of spiders, viii. Prosthesima atra, 5. ecclesiastica, 5. Pythonissa imbecilla, 3. Round cobwebs, 155-159. Saitis pulex, 43. Salticus scenicus, see Epiblemum scenicum, 60. Scales, xi. Scytodes thoracica, 131. Sight of spiders, ix. Singa pratensis, 186. variabilis, 187. Spinnerets, x. Spintharus flavidus, 127. Spiral threads of cobwebs, 155-159. Steatoda borealis, 119. corollata, 121. guttata, 120. marmorata, 120. triangulosa, 121. Stemonyphantes, see Linyphia trilineata, 143.