GENERAL INDEX. xxi 



Page Sec. 

 This mode of reproduction compared with that of Zoophytes 



and Plants 342 896 



Fertility of the Hive-Bee 345 904 



Termite Ants. . . V ." . . * 345 905 



Variously shaped eggs of insects V- V ''. . . . 347 906 



Phenomena of insect-metamorphosis ' . 347 907 



Metamorphoses of Dragon-fly 349 912 



Gnat 350 915 



Anatomy of Caterpillar 352 916 



Digestive apparatus 352 916 



Respiratory system 354 917 



Refe, epiploon, or fat-mass 354 919 



Silk-spinning apparatus 354 920 



Moulting of Caterpillar 356 922 



Change from larva to pupa 357 923 



Conversion of pupa into imago or perfect insect 359 925 



Phenomena attending the healing of wounds in insects .... 359 926 



Internal changes accompanying metamorphosis 359 927 



Changes in the arrangement of the alimentary canal 359 927 



Absorption of fat-mass 360 928 



Disappearance of silk-secreting apparatus 360 929 



Development of generative system 360 930 



Progressive concentration of nervous system 360 931 



Perfection of the organs of the senses * 362 931 



Sounds emitted by insects 362 932 



Phosphorescence of Elater and Lampyrls 362 933 



CHAPTER XIII. 

 ARACHNID A. 



ARACHNIDA Separation of Arachnidans from Insects 363 . 935 



ARACHNIDA TRACHEARIA 364 - . 936 



Their external anatomy 364 . 937 



Structure of locomotive apparatus 364 . 938 



Organization of mouth 365 . 939 



Remarkable structure of digestive system 365 . 940 



Respiratory organs 366 . 942 



Singular respiratory apparatus of Trombidium 366 . 944 



Breathing-organs of Hydrachna and the aquatic Acaridans . . . 367 . 946 



Nervous system 367 . 947 



Eyes 367 . 948 



Generative apparatus 367 . 949 



ARACHNIDA PULMONARIA 368 . 951 



PEDIPALPI 368 . 952 



ARANEID.E 368 . 953 



Apparatus of the mouth in Scorpions 369 . 955 



Spiders 370 . 956 



Alimentary canal 370 . 958 



Anal vessels of the Spider 371 . 960 



Respiratory apparatus 372 . 961 



Circulatory system in Spiders 373 . 964 



Scorpions 374 . 965 



Heart or dorsal vessel of Scorpion 375 . 966 



Arterial system 376 . 969 



" Portal system" of blood-vessels 376 . 970 



Structure of " pulmonibranchiae" 377 . 971 



Venous sinuses 377 . 972 



Course of the circulation in the Scorpionidse 378 . 973 



Nervous system of the Arachnida 379 . 974 



Ocelli or eyes of Arachriidans 380 . 975 



Generative apparatus 380 . 976 



