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The Dipterous Genus Dolichopus Latreille in North America
註釋The dipterous family Dolichopodidae offers such a storehouse of material bearing upon the Darwinian theory of sexual selection that its many beautiful and easily classified species ought to be much more widely known among those who give attention to the larger biological problems. In the present paper a large number of secondary sexual characters are figured, not only as aids to identification, but to give some idea of the wealth of beautiful structures which have been developed in the males of the genus.