300 



INDEX 



Spiders, geometrical, appearance of, 83 ; 

 snares of different species, 85 ; emis- 

 sion of first filament, 89 ; mode of 

 testing radii, 91, 92; of estimating 

 distance between radii, 92 ; persever- 

 ance in architecture, 96 ; fore-limb 

 as an organ of measurement, 100 ; 

 amputation of legs, 104 ; sense of 

 touch, 115, 116; tension the stimulus 

 to reversal, 115, 116; energy of 

 spider, 116; industry, 117 ; emission 

 of filaments, 118; destruction of 

 snare, 120 ; spiders and weather, 124, 

 125 ; experiments showing slavery to 

 instinct, 127-139; inability to recog- 

 nize its own snare, 142 ; mode of 

 escape, 144; protective resemblance, 

 145 ; special senses, 146-149 (also 

 see details under Snare, geometrical) 



Sirobilanthns dalhoiisianus, fertilized by 

 humble-bees, 185 



Sun-biid, purple, feeding habits of, 

 265, 266 



Termites, escape from nest, 226 ; de- 



struction of, 226-228 ; time of flight, 

 229; ascent to great heights, 229; 

 sense of direction, 230 ; simultaneous 

 emergence from many nests, 230, 

 231 ; shedding of wings, 231 ; segre- 

 gation into pairs, 232 



TerpsipJione paradisi (see Paradise 

 flycatcher) 



Tctragnatha, interchange of snares, 

 139-142; protective resemblance, 

 145 (also see details under Spiders, 

 geometrical) 



Tetramo}-ii<m, instance of folly, 42 



Trias, in Hazara, 285, 286, 291 



Vespa 7i!a^mfiia, depredations on hive- 

 bees, 182, 183 



Vespa orieit talis, stream of insects, 177 ; 

 nature of food, 178, 179; ventilation 

 of nest, 179; sentinel over nest, 179 



Water-boatmen (see Notonectidae) 

 Water-scorpion, captures water-boat- 

 men, 169 

 Weevils, feigning death, 159 



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