CONTENTS 



CHAPTER I 



A HIMALAYAN VALLEY 



PAGE 



Definition of Himalaya Appearance of the range District of Hazara 



General features of Hazara Its valleys, hills and forests I 



CHAPTER II 



HARVESTING ANTS 



General habits Appearance of ant Sexual forms Collection of seeds 

 Effect of heat, cold, shade, rain, darkness Cessation of toil Division 

 of labour ............ n 



CHAPTER III 



SENSES AND INSTINCTS OF HARVESTING ANTS 



Sense of smell Sense of direction Communication Play and sport 

 Peacefulness Mode of defence Emotions Economy Migration 

 Pliability of instinct Aberration of instinct Folly of ants . . 24 



CHAPTER IV 



CARNIVOROUS ANTS 



Myrmecocystus setipes General habits Division of labour Food Sense 

 of smell Attitude of abdomen Absence of sympathy Mode of 

 founding new colony Intelligence Folly ...... 44 



CHAPTER V 



COMMUNICATING AND OTHER ANTS 



Phidole indica Mode of attack Power of communication Experiments 

 on faculty of communication Sense of smell Every individual in 

 nest differs Division of labour Attitude of Cremastogastcr Migra- 

 tions of Acantholepis Sexual forms of Camponotus .... 60 



CHAPTER VI 



GEOMETRICAL SPIDERS 



Home of spider Species under discussion Constitution of colonies 

 Construction of snare Emission and structure of the first line 

 Mechanism in construction of radii Mechanism in hub Mechanism 

 in temporary spiral Mechanism in viscid spiral ..... 82 



