2 
TAGK 
Physiology = 35 ll>-48 11 : — 
General 

152 
Parthenogenesis . . 
153 
Sex 
• • • 0 • • 
153 
Caste (vacant) 
Hermaphroditism . . 
153 
Senses 
t • • • « • 
154 
Particular functions 
. . 
154 
Metabolic . . 
. # • • * • 
154 
Kespi ration 
154 
Alimentary 
154 
Pigment, colour . . 
154 
Environmental 
154 
Kegeneration 
• • • • • • 
155 
Chemical . . 
.. 
155 
Development =35 15-481 5 : — 
General 
• • « • • • 
155 
Oogenesis . . 
. . 
15() 
Spermatog'enesis . . 
. . 
15() 
Embryology 
. . 
15() 
Postembryology, Metamorphosis 

15G 
Ethology=3519-4819 : — • 
General 
. • • • • • 
157 
Ant-life ,, 
158 
Bee-life 
. . . . 
159 
Wasp-life . . 
159 
Termite-life 
159 
Cavernicolous 
150 
Aquatic 
159 
Gregariousness 
. . . . . . 
159 
Migration, flight . . 
IGO 
Sound-production . . . . , . 
160 
Food-habits 
160 
Parasitic . . 
161 
Nests, Habitat 
161 
Sex-relations 
162 
Oviposition and parental. . 
162 
Hibernation 
162 
Phenology 
. . 
162 
Instinct and psychology . . 
1 63 
Attitudes . . 
. . 
163 
Luminosity 
163 
Resemblance and utility . . 
163 
Natural history, special cases . . 
. . 
164 
Pupal habits, cocoons 
. . 
165 
Insects and plants 
165 
Galls 
. . . . . . 
165 
