Illustrations xiii 



FACING 

 PACE 



HIPPOPOTAMUS 497 



Photo: W. S. Berridge. 



HARVEST-MOUSE ON THISTLE . 497 



Photo: Douglas English. 



THE FEMALE OF AN ICHNEUMON-FLY (Rhyssa persuasoria) BORING 

 WITH ITS OVIPOSITOR IN A FELLED TREE AND LAYING ITS EGOS IN 

 THE GRUB OF THE GIANT SAW-FLY (Sirex gigas), WHICH is DEEPLY 

 EMBEDDED IN THE WOOD ......... 506 



METAMORPHOSIS OF THE DRAGON-FLY ...... 507 



Photos: J. J. Ward. 



INSECT LIFE (Coloured Illustration} ....... 510 



Chromo-photos: J. J. Ward, F.E.S. 



THE CATERPILLAR LARVA (SECOND STAGE OF LIFE-HISTORY) OF THE 

 DEATH'S-HEAD HAWK-MOTH. THE CATERPILLAR is FEEDING ON 

 POTATO BINES ........... 612 



Photo: J. J. Ward. 



PUPA OF DEATH'S-HEAD HAWK-MOTH (MALE) ..... 512 

 Photo: J. J. Ward. 



THE DEATH'S-HEAD HAWK-MOTH .512 



Photo: J. J. Ward. 



DRIVER- ANTS ATTACKING A SNAKE .513 



METAMORPHOSIS OF THE MOSQUITO 518,519 



HOUSE-FLY (Musca domestica) . . . . . . . .619 



Photo: James's Press Agency. 



QUEEN OF THE TERMITES AND HER COURT ...... 624 



Photo: James's Press Agency. 



TONGUE OF HIVE BEE ......... 524 



Photo reproduced by courtesy of F. Davidson & Co. 



POLLEN BASKET ON HIND-LEG OF HONEY BEE (WORKER) . . . 524 

 Photo: James's Press Agency. 



TREE WASP 525 



Photo: J. J. Ward. 



NEST OF WASP MADE ENTIRELY BY THE QUEEN 625 



Photo: J. J. Ward. 



INTERIOR OF A NEST OF ACTIVE WASPS 625 



Photo: J. J. Ward. 



