CONTENTS xiii 



CHAPTER VIII 



SOME " COLD-BLOODBD " LOVERS 



The Courtship of the Crocodile — Amorous Lizards — Horned Chamac - 

 leons — A Flagellating Terrapin — The Frog that would a-wooing 

 go — Some Musical Frogs — Some marvellous instincts in Newts 



t6i 



CHAPTER IX 



LOVE-MAKING AMONG THB FISHES 



Germinal variations — Fishes and Mate-hunting — Some Remarkable 

 Sexual Differences displayed by the Teeth of " Rays " — The 

 Donble-eyed Fish — The Coloration of the Dragonet — Some ' 

 Curious Facts about Salmon — The Strange Use of the Kidney \ 

 in the Stickle-back — The Stickle-back and Parental Duties — 

 Siamese Fighting-fish . , . . . . .175 



CHAPTER X 



SOME OF THE " LOWER ORDERS " 



Butterflies and Moths, and the Coloration of their Wings — Female 

 Choice and " Fine Feathers " — When Male Butterflies are 

 Dominant — Sexual Selection among Butterflies — Abortive 

 Experiments — Wallace and the Sexual Selection Theory — 

 The Sense of Smell in Butterflies and Moths — Fragrant Butter- 

 flies — Wingless Moths and their Lures to Lovers — Methods 

 of Pairing among Butterflies and Moths — More Experiments 



185 



CHAPTER XT 



BEETLES THAT " BLUFF " 



The Coloration, and other Forms of Ornament in Beetles, and the 

 Significance thereof in regard to the Sexual Selection Theory 

 — The Courtship of Grasshoppers and their Kin — The Remark- 

 able Ears of Locusts and Grasshoppers — The Field-cricket 

 and the Katydid as Troubadours — The Wonderful Performances 

 of the Cicadas — The Duels of Long-horned Locusts — Dragon 

 flies— The May-flies' " Dance of Death " — The Jaws of the 

 Giant Alder-fly and their Strange Use — Some Curious Facts 

 about Stone-flies. ....... 208 



