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Age, in relation to the transmission of characters in birds; variation in accordance with, in birds. Agelaeus phoeniceus. Ageronia feronia, noise produced by. Agrion, dimorphism in. Agrion Ramburii, sexes of. Agrionidae, difference in the sexes of. Agrotis exclamationis. Ague, tertian, dog suffering from. Ainos, hairiness of the. Aitchison, Mr., on sheep. Aithurus polytmus, young of.
Now, in some few cases, the two sexes of the same species appear to have been differently affected; in the Agelaeus phoeniceus the males have had their colours greatly intensified in the south; whereas with Cardinalis virginianus it is the females which have been thus affected; with Quiscalus major the females have been rendered extremely variable in tint, whilst the males remain nearly uniform.
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