294 THE PLACE OF MIMICRY 



PAGE 



5. The All-Importance of Instinct in bringing about Protec- 



tive Resemblance . . . . . . -301 



6. The Hypertely of Brunner von Wattenwyl . . . 302 



7. Hours during which the Struggle for Life is most Severe 303 



8. The Value of Brightly-coloured Surfaces Concealed during 



Rest ......... 305 



c. The Gregarious Habit may assist Concealment . . 304 



10. Adjustable Protective Resemblance . . . . 304 



a. Rapid .-..«... 304 



b. Slow 304 



1 r. Coincidence between the Colours of Organisms and those 



of their Peculiar Environments may be probably 

 Caused by the Local Operation of Natural Selection . 307 



12. The Recent Progressive Darkening of many Species of 



Moths in (he Lancashire and Yorkshire District . 308 



13. Dimorphism and Polymorphism in Pracvyptic Defence . 310 



14. Seasonal Changes in: the Individual . . . .310 

 ■ 15. Seasonal Dimorphism in Procryptic Defence . . .310 



16. Syncryptic or Common Protective Resemblance . .312 



B. Anticryptic or Aggressive Resemblance. . . .312 



C. Allocryptic or Adventitious Protective (and Aggres- 



sive) Resemblance 313 



II SEMATIC COLOURS, OR WARNING AND SIGNAL- 

 LING (RECOGNITION) COLOURS ;— APOSEMATIC 

 AND EPISEMATIC CHARACTERS . . . .313 



A. Aposematic or Warning Characters .... 315 



r. Experimental Evidence of Special Protection in Forms 



with Warning Colours . . . , . .316 



2. Species with Warning Colours depend for their Existence 



upon the Co-Existence of Palatable Species . .317 



3. Erroneous Assumption that Warning Colours imply Com- 



plete Immunity from Attack 317 



4. Transition from Cryptic to Aposematic Defence . .318 



5. Seasonal Transition from Cryptic to Aposematic Defence. 320 



6. Geographical Transition from Aposematic to Cryptic 



Defence ......... 320 



