Half hours with insects . Packard] INSECTS OF tup: GARDEN. 41 species, are greatly iucroascd. We know from personal ob-servation that these male scale insects do travel far from thetrees on which their partners occnr. This leads us to regard this almost unnatural activit} ofthe male scale insect as tending to prevent too close in-and-inbreeding in the species. Nature in her wise and prudentforethought thus, instead of confining the sexes to one tree,so that cousins intermarry and the stock deteriorates, scat- FiG. 32.

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectinsects, bookyear1881