134 



Stereokinesis, 116 

 Sterol, 70 



Stimulatory organs, 121 

 Stretch receptors, 119 

 Storage kidneys, 55 

 Stratiomyiidae, 58 

 Stylet sheath, 46 

 Stylops, 93 



Subgenual organ, 119 

 Suboesophageal ganglion, 114 

 Superposition eyes, 125 

 Supraoesophageal ganglion, 114 

 Surfaces forces and the cuticle, 5 

 Symbionts, in digestion, 50 



in nutrition, 70 

 Synapse, 112, 113 



Tabanus, 29 

 Taenidia, 12 

 Taste, 121 

 Telotaxis, 117 

 Temperature control, 73 



of insects, 73 



resistance, 74 



sense 1 23 

 Tenebrio, 1, 62, 66, 80, 85, 90 

 Tension receptors, 119 

 Termites, 50 

 Testis, 97 



Tettigonia, 107, 120 

 Thanatosis, 116 

 Thermobia, 74 

 Thigmotaxis, 116 

 Thoracic gland, 86 

 Thysanura, 85, 86, 100 

 Tineola, 48, 85 

 Tonofibrillae, 106 

 Tonus, 108 

 Touch, 118 

 Tracheae, 12, 21 



appearance of air in, 14 



permeability of, 13 



INDEX 



Tracheal capillaries, 12 



lungs, 35 



system, ventilation of, 17 

 Tracheoles, 12, 21 



fluid in, 13 



TREVTRANUS, 15, 17 



Tribolium, 71 

 Tropotaxis, 117 

 Tsetse-fly, 44, 46, 49, 51, 70 

 Tympanum, 120 



Ultra-violet, perception, 126 

 Urate cells, 56 

 Uric acid, 56, 59, 61, 68 

 Urine, 58 



VAN WISSELINGH, 2 



Venoms, 78 

 Ventilation control, 17 

 Ventral gland, 86, 88 

 Verson's glands, 58 

 Vesicular secretion, 47 

 Vespa, 29 



Visceral nervous system, 30 

 Visibility of spectrum, 126 

 Vision, 123 

 Visual acuity, 124 



intensity discrimination, 124 

 Vitamins, 69, 98 

 Vitelline membrane, 98 

 Viviparous insects, 104 



WAGNER, 104 



Water metabolism, 71 

 Wax, 78 



layer, 4 



canal filaments, 5 

 weismann, 33, 55, 87 

 Wings, expansion of. 10, 34 

 Wound healing, 34, 90 



