GENERAL INDEX. 



799 



INSECTA continued.^ 



dermo-skeleton, ii. 881. . . 



its chemical composition, chitine 01 



molinc, ii. 881. 

 it> thirteen segments, n. 882. 

 abdomen, ii. 918. 



articulations, ii. 883. . .. 



head, table of the parts and appendages ol the, n. 



885. 



account of these, n. 885. 

 antenna:, ii. 890. 

 development of the head, n. 09, 

 internal parts of the head, ii. 892. 

 mandibles, ii. 888. 

 maxillse, ii. 889. 

 mouth, ii. 897. 

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



aberrations of forms in the organs of 



motion, ii. 933. 

 legs, ii. 931. 

 wings, ii. 924. .. 



articulation of the wings, n. 9*. 



neuration!' or distribution of the tracheae 



in the wings, ii. 926. 

 use of the wings of insects, > B39- . 

 powers of flight of insects, in. 419. See ft 



TION, ANIMAL. ... 



powers of leaping of insects, >...*"?:. 

 velocity of predaceous insects, in. 44J. 

 locomotive powers of aquatic insects, HI. 4,14. 

 thorax, ii. 911. 



meso-thorax, u. 914. 

 meta-thorax, ii. 914. 

 pro-thorax, ii. 914. 

 table of parts, ii. 913. 

 muscular system, ii. <J34; iii. 538. 

 muscles of the larva, u. 93-i. 



of the perfect insect, n. 939. 

 nervous system, ii. 942; iii. 609. 



development of the brain and nervous system, 



ii. 962. 



nervous system of the larva, n. 943. 

 nerves of the head, n. 945. 

 of the thorax, ii. 945. 

 of the abdomen, ii. 946. 

 nervous system of the perfect insect, n. 948. 

 distribution, ii. 955. 

 structure, ii. 9-V-'. 

 organs of hearing, ii. 961. 



smell, ii. 962 ; iv. 700. 

 touch, ii. 961. 

 vision, ii. 960. 



optic nerves of the' compound 



eyes of insects, iii. 775. 

 nutrition, organs of, ii. 965. 



alimentary canal ot larva, u. 966; s. 298. 



appendages of the canal, n. 973. 

 alimentary canal of perfect insect, n. 90s ; s. 298. 



appendages of the canal, ii. 965. 

 biliary apparatus of, iv. 446. 

 ingluvies or crop, s 298. 

 gizzard, s. 298. 

 stomach, s. 29S. 

 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, n. 97 J 



nS!t 987. See 



INSECTIVORA continued. 



digestive organs, ii. 1000 ; s. 302. 



teeth, ii. 1000. 



thymus gland of, iv. 1090. 

 muscles, ii. 998. 

 nervous system, n. 1002. 

 osteology, ii. 995. 



pelvis of, s. 164. 

 reproduction, organs of, n. K 



Weberian organ in, iv. 1417. 



- Creator for InsecUvora 



during winter, ii. 764. . 



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



"""serious consequences resulting from iv. 686. 

 Inspiration and expiration, comparative force of muscular 



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

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

 Insula of Rcil, iii. 696. 698. 



lNST characteri!tics of the phenomena of instinct, iii. 4-6. 

 influence of external conditions in producing new 

 instincts, iv. 1303 



thl'reiuon'o, man compared with the instinct of the 

 lower animals, iii. 2, et scq. 



I. Instincts designed for the preservation of the indi- 



vidual, iii. 7. 



1. for defence and offence, in. 7. 



2. relating to the procuring ol lood, 111. 7. 



3 in the construction of habitations, in. a. 



4 connected with hibernation, in. 11. 



II. Instincts for the propagation and support 



spring, iii. 13. 

 1 migration, iii. 13. ... 



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



3. nidification, iii. 14. 



temperature ot. ii. 6oO. 

 hermaphroditism among, 11. JAl- . 



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 ol the, in. 7. 

 electricity of some insects, ii. 82. 

 instinct of congregation of insects, in. 10. 

 imperfect societies, iii. 16. 

 for society alone, iii. 16. 

 of males in the pairing season, in. lb. 

 Hl for emigrating together, iii. 16. 

 for feeding together, iii. 16. 

 for some common work advantageous to the com- 



munity. iii. 16. 



occasional association, in. 17. ... _ 



instincts guiding insects in procuring food, in. 7. . 

 instincts guiding them in the construction of their 



habitations, iii. 9. ,, ... .. 



habitations of " perfect societies of insects in. 11. 

 iNSECTivoBA, a group of Mammiferous animals, n. 994. 

 families, ii. 994. 



Erinaceadae, or hedgehogs, n. 994. 

 Soricidse, or shrews, ii. 591. 

 Talpida?, or moles, ii. 994. 

 Tupaiadse, or Tupaia family, n. 994. 



and protection for the 



III toiUncSTSS.ttag 1 to the welfare of the race or of 



the animal creation generally, in. 15. 

 common toman and brutes, iii. l.i. 

 motives of action contrasted with intellect, in 1 

 congregation, iii. 16. 



imperfect societies of insects, in. lb. 

 for society alone, iii. Hi. 

 of males in the pairing season, in. lb. 

 for emigration, iii. 16. 

 for feeding together, in. 16. 

 for some common work advantageous to 



the community, iii. 17. 

 of the higher animals for various purposes, 



perfect' societies of insects, as ants and bees, 



deviations of the instincts of insects, and their 

 accommodation to circumstances, in. 1. 



reasons for considering the . a< f B V 1 ?. 

 bees as the result of instinct, not of reason 



ins"a g nces of' actions of the lower animals in 

 which short processes of reasoning seem 

 to have been concerned, HI. 21 ii. 



acquired instincts, iii. 23. 



instinct viewed with respect to the part 

 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, 111. 2... 

 adaptation of the instincts and powers ot 

 animals to their office in creation, 



evidences of Design from its effects, iii. 



27, 28. 

 Integuments. See TEGUMENTARY ORGANS. 



of the back, i. 367. . ir 



JnleW-ct motives of action contrasted with, n. lb. 



M progress of man, capacity for, compared with 

 the instincts of the lower animals, iv. 1300. 

 Iterance, long continued, a cause of wasting of the 



brain, iii. 720. 

 delirium tremens, in. 720. 

 Intensity of the human voice, iv. 1475. 

 Interarticular cartilages, or menisci, i. 249., 



ligament, iv. 1032. 

 Interculumnnl bands, i. 5 

 Intercostal arteries, i. A(>i . 189. 19J , m. * 

 anastomoses, i. 794. _ 



dorsi.l branches, i. 307. 

 anterior, iv. 822.; 

 superior, iv. 824. 

 muscles, external, iv. 334. 1043. 

 internal, iv. 334. 1043. 

 action of the intercostal muscles, iv. H 



nerves, iv. 760. 



costo-humeral branches o!,i.3bO. 



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



pathetic Nerve. 

 second, i. 217. 

 third, i. 217- 



