GENERAL INDEX 



431 



termites and Protozoa, 246 



Tertiary insects, 92 



Tetrastichus, 363, 374 



Therion, 361 



Thrixion, 339, 352 



Thj^sanura, 11, 23, 28, 36; abdominal 



appendages, 41 ; genitalia, 48 

 Tibicina, 30 

 Tineola, 233 

 Tiphia, 385 

 transtarsus, 23 

 Triassagricni, 90 

 Triassic insects, 90 

 Triassolestes, 90 

 Triassopsy chops, 90 

 Triatoma, 66 

 TriboUum, 245 

 Trichogramma, 326, 407 

 Trichlosoba, 87 

 Trichoptera, 91 

 trochanter, 25, 26, 27 

 trochantin, 29 

 trophamnion, 360 

 tropisms, 122 

 tsetse flies, see Glossina. 

 tympanal organs, 143 ; functions, 151 

 Tyria, 419 

 tyrosin, 191, 193 

 tyrosinase, 191, 193, 201 



ultra-violet perception, 114, 121 

 United States, biological control in, 370, 



376, 379, 381, 395 

 Urania, coloration, 176 

 uric acid, 193 



vacuum, effects of, 237 



Vanessa, 109, 133, 149, 153, 190, 192, 



199 

 van't Hoff's law, 210, 219 

 varietal resistance to insect attack, 276 

 Vedalia, 370, 385 

 velocity curve, 209 

 venation, 16 

 vision, 108; by ocelli, 110; colour 



vision, 113 

 vitamins, 243 



weeds, biological control of, 410' 

 white-fly control, 389 

 Winthemia, 231 

 woodlice, parasites of, 319 

 woolly aphis, 277, 279 



Xiphidium, protopod phase, 57 

 Xyleboms, 271 



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