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Other species, for instance diamond-beetles, are ornamented with splendid colours, which are often arranged in stripes, spots, crosses, and other elegant patterns. Such colours can hardly serve directly as a protection, except in the case of certain flower-feeding species; but they may serve as a warning or means of recognition, on the same principle as the phosphorescence of the glow-worm.
Diamond-beetles, bright colours of. Diastema, occurrence of, in man. Diastylidae, proportion of the sexes in. Dicrurus, racket-shaped feathers in; nidification of. Dicrurus macrocercus, change of plumage in. Didelphis opossum, sexual difference in the colour of. Differences, comparative, between different species of birds of the same sex.
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