GENERAL INDEX. 



799 



INSECTA continued. 



derma-skeleton, ii. 881. 



its chemical composition, chitine or tnto- 



raoline, ii. 881. 

 it-, thirteen segments, ii. 882. 

 abdomen, ii. 918. 

 articulations, ii. 883. 

 head, table of the parts and appendages of the, ii. 



885. 



account of these, ii. 885. 

 antennae, ii. 890. 

 development of the head, ii. 09, 

 internal parts of the head, ii. 892. 

 mandibles, ii. 888. 

 maxillae, ii. 889. 

 mouth, ii. 897. 

 locomotion, organs of, ii. 924 ; iii. 442. 



aberrations of forms in the organs of loco- 

 motion, ii. 933. 

 legs, ii. 931. 

 wings, ii. 924. 



articulation of the wings, ii. 92G. 



file, ii. 928. 



neuration, or distribution of the tracheae 



in the wings, ii. 926. 

 use of the wings of insects, iii. 539. 

 powers cf flight of insects, iii. 419. See Mo- 



TION, ANIMAL. 



powers of leaping of insects, iii. 475. 

 velocity of predaceous insects, iii. 443. 

 locomotive powers ol" aquatic insects, iii. 434. 

 thorax, ii. 911. 



meso-thorax, ii. 914. 



meta-thorax, ii. 914. 



pro-thorax, ii. 914. 



table of parts, ii. 913. 



muscular system, ii. 934; iii. 538. 



muscles of the larva, ii. 935. 



of the perfect insect, ii. 939. 

 nervous system, ii. 942 ; iii. 609. 



development of the brain and nervous system, 



ii. 962. 



nervous system of the larva, ii. 943. 

 nerve's of the head, ii. 945. 

 of ihe thorax, ii. 945. 

 of the abdomen, ii. 946. 

 nervous system of the perfect insect, ii. 948. 

 distribution, ii. 955. 

 structure, ii. 952. 

 organs of hearing, ii. 961. 



smell, ii. 962 ; iv. 700. 

 touch, ii. 9G1. 

 vision, ii. 960. 



optic nerves of the' compound 



eyes of insects, iii. 775. 

 nutrition, organs of, ii. 965. 



alimentary canal of larva, ii. 966 ; s. 298. 



appendages of the canal, il. 973. 

 alimentary canal of perfect insect, il. 905 ; a. 298. 



appendages of the canal, ii. 965. 

 biliary apparatus of, iv. 446. 

 ingluvies or crop, s 298. 

 gizzard, s. 298. 

 stomach, s. 298. 

 hepatic cceca of, iii. 174. 



salivary glands of insects, iv. 431. 

 tongues of insects, iv. 1 142. 

 mucous coat, ii. 966. 

 muscular coat, ii. 965. 

 peritoneal coat, ii. 965. 

 adipose tissue, ii. 975. 

 anal, or proper uriniferous organs, ii. 975. 

 respiration, organs of, ii. 



function of respiration, ii. 987. See RESPIRATION. 

 Insecta, re-piratory movements of insects, iv. 1019. 



tegumentary appendages, hair, scales, spines, ii. 993. 

 temperature of. ii. 650. 

 hermaphroditism among, ii. 721. 

 INSECTA list of insects possessing the property of lumi- 



nousness, iii. 197. See LUMINOUSNESS, ANIMAL. 

 dormant vitality of, iii. 157. 

 effect of fear on some of the, iii. 7. 

 electricity of some insects, ii. 82. 

 instinct of congregation of insects, iii. 16. 

 imperfect societies, iii. 16. 

 for society alone, iii. 16. 

 of males in the pairing season, iii. 16. 

 for emigrating together, iii. 16. 

 for feeding together, iii. 16. 



for some common work advantageous to the com- 

 munity, iii. 16. 



occasional association, iii. 17. 

 instincts guiding insects in procuring food, iii. 7. 

 instincts guiding them in the construction of their 



habitations, iii. 9. 



habitations of " perfect societies of insects," iii. 11. 

 INSECTIVORA, a group of Mammiferous animals, ii. 994. 

 families, ii. 994. 



Erinaceadae, or hedgehog*, ii. 994. 

 Soricidae, or shrews, ii. 

 Talpidae, or moles, ii. 994. 

 Tupaiadae, or Tupaia family, ii. 994. 



i\ OR A continued. 

 digestive organs, ii. 1000 ; s. 302. 

 teeth, ii. 1000. 

 thymus gland of, iv. 1096. 

 muscles, ii. 998. 

 nervous system, ii. 1002. 

 osteology, ii. 995. 



pelvis of, s. 164. 



reproduction, organs of, ii. 1005. 

 Weberian organ in, iv. 1417. 

 tegumentary system, ii. 1004. 

 provisions afforded by the Creator for Insectlvora 



during winter, ii. 764. 



Insessores, or perching birds, characters of, i. 267. 

 Insomnia, iv. 686. 



serious consequences resulting from, iv. 686. 

 Inspiration and expiration, comparative force of muscular 



movements of, iv. 336. 1060. See RESPIRATION. 

 Instep, the, i. 147 ; ii. 339. 

 Insula of Rcil, iii. 696. 698. 

 INSTINCT, iii. 1. 



characteristics of the phenomena of instinct, iii. 46. 

 influence of external conditions in producing new 



instincts, iv. 1303 

 definition, iii. 1. 



the reason of man compared with the instinct of the 

 lower animals, iii. 2, et seq. 



I. Instincts designed for the preservation of the indi- 



vidual, iii. 7. 



1 . for defence and offence, iii. 7. 



2. relating to the procuring of food, iii. 7. 



3. in the construction of habitations, iii. 9. 



4. connected with hibernation, iii. 11. 



II. Instincts for the propagation and support of off- 



spring, iii. 13. 



1. migration, iii. 13. 



2. choice of place for the deposit of ova, iii. 14. 



3. nidification, iii. 14. 



4. incubation, iii. 14. 



5. procuring nourishment and protection for the 



young, iii. 15. 



III. Instincts relating to the welfare of the race or of 



the animal ci cation generally, iii. 15. 

 common to man and brutes, iii. 15. 

 motives of action contrasted with intellect, iii 16. 

 congregation, iii. 16. 



imperfect societies of insects, iii. 16. 

 for society alone, iii. 16. 

 of males in the pairing season, iii. 16*. 

 for emigration, iii. 16. 

 for feeding together, iii. 16. 

 for some common work advantageous to 



the community, iii. 17. 

 of the higher animals for various purposes, 



iii. 17. 

 perfect societies of insects, as ants and bees, 



iii. 18. 

 deviations of the instincts of insects, and their 



accommodation to circumstances, iii. 19. 

 reasons for considering the actions of ants and 

 bees as the result of instinct, not of reason- 

 ing, iii. 20. 



instances of actions of the lower animals in 

 which short processes of reasoning seem 

 to have been concerned, iii. 21 23. 

 acquired instincts, iii. 23. 



instinct viewed with respect to the part it 

 takes in the unceasing changes going on at 

 the earth's surface, iii. 23. 

 free will in man, iii. 24. 

 viewed with respect to final causes, iii. 25. 

 adaptation of the instincts and powers of 

 animals to their office in creation, 

 iii. 27. 

 evidences of Design from its effects, iii. 



27, 28. 

 Integuments. See TEGUMENTARY ORGANS. 



of the back, i. 367. 



Intellect, motives of action contrasted with, ii. 16. 

 Intellectual progress of man, capacity for, compared with 



the instincts of the lower animals, iv. 1300. 

 Intemperance, long continued, a cause of wasting of the 



brain, iii. 720. 9 



delirium tremens, iii. 720. 

 Intensity of the human voice, iv. 1475. 

 Interarticular cartilages, or menisci, i. 249. 



ligament, iv. 1032. 

 Intercolumnal bands, i. 5. 

 Intercostal arteries, i. 367. 189. 193 ; iii. 248. 

 anastomoses, i. 794. 



dorsal branches, i. 367. 

 anterior, iv. 822. ; 

 superior, iv. 824. 

 muscles, external, iv. 334. 1043. 

 internal, iv. 334. 1043. 



action of the intercostal muscles, iv. 1044. 1055. 

 nerves, iv. 760. 



costo-huraeral branches of, i.360. 

 great, of the older anatomists, s. 423. See Sym- 

 pathetic Nerve. 

 second, i. 217. 

 third, i. 217- 



3 F 4 



