Contributions to the Theory of Natural Selection: A Series of EssaysMacmillan and Company, 1870 - 384 pages |
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Page 30
... eggs , and is said to rear gener- ally but one young one . Why is this bird so extraordinarily abundant , while others producing two or three times as many young are much less plen- tiful ? The explanation is not difficult . The food ...
... eggs , and is said to rear gener- ally but one young one . Why is this bird so extraordinarily abundant , while others producing two or three times as many young are much less plen- tiful ? The explanation is not difficult . The food ...
Page 70
... eggs and young of which are especially ob- noxious to danger , and we find accordingly a variety of curious contrivances to protect them . We have nests carefully concealed , hung from the slender extre- mities of grass or boughs over ...
... eggs and young of which are especially ob- noxious to danger , and we find accordingly a variety of curious contrivances to protect them . We have nests carefully concealed , hung from the slender extre- mities of grass or boughs over ...
Page 75
... eggs , so that their larv¿ may feed upon the larvae of the bees , and these flies are each wonderfully like the bee on which it is parasitic . Kirby and Spence believed that this resem- blance or " mimicry " was for the express purpose ...
... eggs , so that their larv¿ may feed upon the larvae of the bees , and these flies are each wonderfully like the bee on which it is parasitic . Kirby and Spence believed that this resem- blance or " mimicry " was for the express purpose ...
Page 82
... eggs and leave a numerous progeny , many of which would inherit the peculiarity which had been the safeguard of their parent . Now , this hypothetical case is exactly realized in South America . Among the white butterflies forming the ...
... eggs and leave a numerous progeny , many of which would inherit the peculiarity which had been the safeguard of their parent . Now , this hypothetical case is exactly realized in South America . Among the white butterflies forming the ...
Page 98
... eggs . There are also bees that mimic bees . The cuckoo bees of the genus Nomada are parasitic on the Andrenid¿ , and they resemble either wasps or species of Andrena ; and the parasitic humble - bees of the genus Apathus almost exactly ...
... eggs . There are also bees that mimic bees . The cuckoo bees of the genus Nomada are parasitic on the Andrenid¿ , and they resemble either wasps or species of Andrena ; and the parasitic humble - bees of the genus Apathus almost exactly ...
Other editions - View all
Contributions to the Theory of Natural Selection: A Series of Essays ... Alfred Russel Wallace No preview available - 2018 |
Contributions to the Theory of Natural Selection: A Series of Essays Alfred Russel Wallace No preview available - 2016 |
Common terms and phrases
abundant action adapted alike animals antenn¿ appear beautiful become beetles birds Borneo brain brilliant build butterflies caterpillars causes Celebes changes character closely allied species colour concealed conspicuous Crown 8vo curious Danaida Darwin Diphilus distinct Edition eggs equally essay evidence exactly existence external extinct Extra fcap facts faculties favourable Fcap flowers genera genus geological groups Guinea habits Heliconid¿ imitation India individuals inhabiting insects instinct islands Java larv¿ Lepidoptera less Malayan male Mimeta mimic mimicry mode modified Moluccas moths natural selection nectary nest never nidification number of species observations occur organic Origin of Species Ormenus Pammon Papilio Papilio Ulysses Papilionid¿ peculiar perfect period phenomena POEMS Polydorus possess present probably produced protection race regions remarkable render resemble savage sexes sexual sexual selection shown structure Sumatra tail theory of natural Theseus tints tion trees tropical variation varied varieties whole wings
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