Tropical Nature, and Other EssaysMacmillan and Company, 1878 - 356 pages |
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Page 195
... both sexes or to one only , according as they first appeared at an early age , or in adults of one sex ; and thus we may account for some of the most marked differences in this respect . With the exception of 02 SEXUAL SELECTION . 195.
... both sexes or to one only , according as they first appeared at an early age , or in adults of one sex ; and thus we may account for some of the most marked differences in this respect . With the exception of 02 SEXUAL SELECTION . 195.
Page 196
Alfred Russel Wallace. marked differences in this respect . With the exception of butterflies , the sexes are almost alike in the great majority of insects . The same is the case in mammals and reptiles ; while the chief departure from ...
Alfred Russel Wallace. marked differences in this respect . With the exception of butterflies , the sexes are almost alike in the great majority of insects . The same is the case in mammals and reptiles ; while the chief departure from ...
Page 197
... marked differences of colour are not required , owing to their higher organization and more perfect senses , which render recognition easy by means of a combination of very slight differential characters . This principle may perhaps ...
... marked differences of colour are not required , owing to their higher organization and more perfect senses , which render recognition easy by means of a combination of very slight differential characters . This principle may perhaps ...
Page 217
... marked wings of some butterflies and moths . Colours are produced or intensified by processes of development , either where the integument or its appendages undergo great extension or modification , or where there is a surplus of vital ...
... marked wings of some butterflies and moths . Colours are produced or intensified by processes of development , either where the integument or its appendages undergo great extension or modification , or where there is a surplus of vital ...
Page 219
... marked preponderance of highly - coloured species . This is probably due to a variety of causes , some of which we can indicate , while others remain to be discovered . The luxuriant vegetation of the tropics throughout the entire year ...
... marked preponderance of highly - coloured species . This is probably due to a variety of causes , some of which we can indicate , while others remain to be discovered . The luxuriant vegetation of the tropics throughout the entire year ...
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Common terms and phrases
abundant adapted adorned Africa allied Amazon animals ants Asia attract bamboo Batavia beautiful become birds blue brilliant butterflies carnivora causes changes character characteristic climate colour Colours of Animals comparatively conspicuous continent curious Danaidæ Darwin distinct Eocene equator equatorial zone existence extensive fact families fauna favourable feet female ferns fertilization flowers foliage forests fruits genera genus greater green groups habits heat humming-birds hyænas immense inhabit insects Juan Fernandez land larger larvæ leaves lemurs less light Madagascar Malay Archipelago male mammalia marsupials Miocene monkeys natural selection naturalists North northern observed occur ocean ornaments Palearctic parrots peculiar perhaps phenomena plants plumage probably produced proportion protection rays region remarkable resemble sexual selection showy slender sometimes South America species spots structure sun-birds surface tail temperate zones temperature theory tints tion trees tropical trunks Ungulata variation varied variety vegetation whole wings yellow