_Cricket_ (Gryllus _myrmecophilus_), found in ants' nests, 178 _England_, do ants harvest in, 159 (note) _Formic acid_, experiments with, 173 Formica _erratica_, 164; _nigra_, collecting violet seeds, 159 (note) Gryllus _myrmecophilus_, found in ants' nests, 178 _Hindoos_, custom of scattering rice for ants, 176 _India_, observations in, 175 _Insects_ found in ants' nests, 177 _Jews_, laws treating of rights over ants' stores, 165 _King_ (Dr.), observations in India, 175 _Lizards_ capturing ants, 162 _Misna_, allusion to harvesting ants in, 165 _Montpellier_, harvesting ants at, 160 _Nests_, quantity of seeds contained in, 170 _Palestine_, harvesting ants in, 165 Pheidole _megacephala_, 160 Pterocles _exustus_, feeding on seeds collected by ants, 175 _Robin_ eating ants, 163 (note) _Seed-stores_ of ants, Jewish laws about, 165 _Seeds_, intervention of ants necessary to prevent germination of, 172; non-germination of in granaries, 171 _Wakefield_ (Mr.), on ants collecting violet seeds, 159 (note) PART II.--TRAP-DOOR SPIDERS. _Ants_ form a large part of food of trap-door spiders, 237 Atypus _bleodonticus_ (Sim.), 183 (note); _piceus_ (Sulzer), nests of, 182-3, 248; species of in England, 181, 185 _Australia_, nest of wafer type from, 217 _Bates_ (Mr. H. W.), on the nest of _Theraphosa Blondii_, 188 _Beetle_ (Chrysomela _Banksii_) rejected by trap-door spider, 241 _Blackwall_ (Mr. J.), on the poison of spiders, 201 _Bordeaux_, new type of nest at, 211 _Brown_ (Mr. Joshua), discovery of _Atypus_ in England, 185 _California_, trap-door spider from, 198-9; habits of in captivity, 203, &c.; indifference to sounds, 206 _Captive spiders_, habits of, 203, 218, 242-6 _Caterpillar_ (larva of Cucullia _verbasci_), eaten by trap-door spider, 239 _Cell and tube_ made by _N. Eleanora_, 218; hygrometricity of, 220 _Chrysomela Banksii_, distasteful to trap-door spider, 241 _Cork nest_, 193; structure of door of, 193 Cteniza _californica_ (Camb.), 198, 202, 248; description of, 260; eggs laid by, 203; habits of in captivity, 203, &c.; indifference to sounds, 206; mode of excavating, 208; _fodiens_ (Walck.), 195, 248, 259; _ionica_, 210; _Moggridgii_ (Camb.), 196; description of, 254; habits of in captivity, 243, 246 Cucullia _verbasci_, larva of, eaten by trap-door spider, 239 Cyrtauchenius _elongatus_ (Sim.), nest of, 189, 248 _Diagrams_ representing different types of nest, 193 _Earwig_ (_Forficula_) eaten by trap-door spiders, 238 _Eggs of_ Cteniza _californica_, 203 _Enemies of spiders_, 200, 205 _Enlargement of nests_, 245 _Excavation_ of trap-door nests, 208, 243-4 _Food of trap-door spiders_, 237-9, 241; mode of procuring, 238 _Funnel type_ of nest, constructed by _Cyrtauchenius elongatus_, 189