294 THK PLACE OF MIMICRY 



PAGE 



"). The All- Importance of Instinct in bringini^ about Protec- 

 tive Resemblance . . . . . . -301 



6. T/ie Hypertely of Ihwiner von Wattemvyl . . 302 



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

 i^. The r,ilue (f Brightly-coloured Surfaces Concealed during 



Rest ......... 303 



{ . The Gregarious Habit may assist Concealment . . 304 

 10. Adjustable Protective Resemblance . . . .304 



a. Rapid ........ 304 



b. Slow ......... 304 



I I. Coituidaue between the Colours of Organisms and those 



of their Peculiar Environments 7nay be probably 

 Caused by the Local Operation of Natural Selection . 307 

 I :. The Recent Progressive Darkening of many Species of 



Moths in the Lancashire and Yorkshire District . 308 



13. Dimorphism and Polymorphism in Procryptic Defence . 310 



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



15. Seasonal Dimorphism in Procryptic Defence . . .310 

 iC. Syncryptic or Cojujuon Protective Resemblance . . 31J 



H. Anturyptic or Aggressivk Resemblance. . . • ni2 



C. Al.I.OCRYPTIC OR AdVENTITIOIS PROTECTIVE (aND AgGRES- 



sive) Resemblance . . . . . . • 313 



II SKMATIC COLOURS, OR WARNING AND SIGNAL- 

 LING (RECOGNITION) COLOURS ;—APOSEMATIC 

 AND EPISKMATIC CHARACTERS .... 31.-, 



A. Aposematic or Warning Characiers . . . -315 



1. K.xperimenlal Evidence of Special Protection in Forms 



with Warning Colours . . . . . .316 



2. Species ivilh Warning Colours depend for their Existence 



up>on the Co-Existence of Palatable Species . . 317 



3. Erroneous Assumption that Warning Colours imply Com- 



plete Immunity fro?n Attack . . . . -317 



4. Transition from Cryptic to Aposematic Defence . . 318 

 .■",. Seasonal Transition from Cryptic to Aposematic Defence. 320 

 6. Geographical Transition frn?n Aposematic to Cryptic 



Defence . . , . . . . . .320 



