28 4 



INDEX 



versicolor, 262 

 Tetragnathids, 183 

 Tetragnathinae, 183 

 Texas Fever of cattle, 19 

 thaddeus, 189 

 Thalassius, 209 

 Thanatus, 225 



flavidus, 237 



peninsulanus, 237 

 Theraposa, 119 



blondi, 33 

 Theraposidae, 118 

 Theridiid web, 164 

 Theridiidae, 57, 58, 162 

 Theridiids, 163 

 Theridion, 166 



differ em, 166 



frondeum, 166 



notatum, 164 



tepidariorum, 90, 162, 164, 166, 257 



zelotypum, 163 

 Theridiosoma, 39 



radiosa, 185 



Theridiosomatinae, 185 

 Thick-jawed spiders, 183 

 Thomisidae, 224 

 Thomisoididae, 235 

 thoracic a, 235 

 thorellii 139 

 Tibellus, 225 

 Tibia, 23 

 Ticks, 1 8 

 Tidarren, 48, 166 



fordum, 175 

 Tiger wolf, 202 

 torreya, 114, 115 

 Totri, Luigi, 252 

 Toxicity, 253 

 Trabea, 199 

 Tracheae, 12 

 Tracheal spiracles, 25 

 Trachelas tranquillus, 34 

 tranquillus, 34 

 Trap door, 202, 203 

 Trap-door spiders, 3, 107, 109, no, 



"5, 2 47 



protective devices of, 117 



rake of, no 



true, 109 



types of, 113 



types of nests of, 1 10 

 Trap line, 190 

 Trapeze line, 191 

 Treat, Mary, 203 



Trechona venosa, 247 

 tredecim-guttatus, 248 

 Triangle spiders, 152 



spinning of the web, 152 

 trifolium, 190, 261 

 trigona, 168 

 triton, 34, 208 

 Trochanter, 23 

 Tropic Days, 6, 64 

 Tropic Day, 64 



Tropicopolitan spiders, 257, 258 

 True spiders, 101, 102, 107 



abdomen of early, 105 



emergence of, 102, 103 



evolution of, 103 



features of, 105 



habits of, 105 



simplification of organs, 104, 105 

 truncata, 115, 116, 117 

 Tube webs, 2 

 Turret, 202, 204 

 Turret spider, 131 

 turricola, 204 

 tusti-bowl, 7 

 Tutelina elegans, 84 

 Typical crab spiders, 224 

 Typical hackled band weavers, 141 

 Typical tarantulas, 109 

 Typical wolf spiders, 199 



Ubiquitous spiders, 257 

 Uloborid, 150 

 Uloboridae, 141, 146, 241 

 Uloborus, 150 



americanus, 34, 150 



arizonicus, 34, 151 



republicanus, 34 



spinning of orb web of, 150 

 unicorn, 173 

 Urocteidae, 263 

 Usofila gracilis, 162 



Vagrant linyphiid, 172 

 Vagrant theridiids, 169 

 vancoho, 248 

 vasifer, 229 

 vatia, 227 



veinte cuatro boras, 248 

 venatoria, 224 

 Venom, 16, 23, 241, 253 



hematoxic, 245 

 venosa, 247 

 versicolor, 262 

 Vertebrate as food, 125 



