  - Abdomen, the posterior half of the body, x.
- Acrosoma, 188.
- mitrata, 189.
- rugosa, 189.
- spinea, 190.
- Adult characters of spiders, xi.
- Agalena nÆvia, 93.
- AgalenidÆ, 91.
- Age of spiders, xv.
- Agroeca pratensis, 11.
- Air-sacs, x.
- Air-tubes, x."
- Amaurobius americana, 215.
- ferox, 215.
- sylvestris, 213.
- Anatomy of spiders, viii-xi.
- AnyphÆna calcarata, 13.
- incerta, 12.
- rubra, 13.
- saltabunda, 14.
- Argiope, 194.
- cocoons of, 197, 200.
- riparia, 194.
- transversa, 198.
- webs of, 192, 194, 196, 199.
- Argyrodes, 123.
- fictilium, 126.
- nephilÆ, 125.
- trigonum, 124.
- Argyroepeira hortorum, 191.
- Ariadne bicolor, 123.
- Asagena americana, 122.
- AttidÆ, 41.
- Attus palustris, 42.
- Bathyphantes, see under Linyphia, 143, 145.
- Bites of spiders, viii.
- Breathing holes, x.
- CÆlotes, see under Tegenaria, 99.
- Calamistrum, 205.
- Catalogue of American spiders, viii.
- Cephalothorax, viii.
- Ceratinalla fissiceps, 152.
- lÆtabilis, 151.
- Ceratinopsis interpres, 153.
- Chiracanthium viride, 21.
- CiniflonidÆ, 205.
- Claws, x.
- Clubiona, 15.
- canadensis, 17.
- crassipalpis, 16.
- excepta, 19.
- ornata, 18.
- rubra, 18.
- tibialis, 16.
- Cobwebs, xiv.
- Cocoons, xiv.
- Colors, 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.
- 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.
- Poecilochroa 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,
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