The labour of the man may not always be useful in the highest sense to his society, or it may even be distinctly harmful and antisocial, as in the case of the robber-barons of the Middle Ages, who lived by capturing and despoiling all who passed by their castles; or as in the case of the share speculators, stock-jobbers, ring-and-corner capitalists, and monopolists of the present day, who feed upon the productive labours of society without contributing anything to its welfare. But even males so occupied are compelled to expend a vast amount of energy and even a low intelligence in their callings; and, however injurious to their societies, they run no personal risk of handing down effete and enervated constitutions to their race. Whether beneficially or unbeneficially, the human male must, generally speaking, employ his intellect, or his muscle, or die. The position of the unemployed modern female is one wholly different. The choice before her, as her ancient fields of domestic labour slip from her, is not generally or often at the present day the choice between finding new fields of labour, or death; but one far more serious in its ultimate reaction on humanity as a whole--it is the choice between finding new forms of labour or sinking slowly into a condition of more or less complete and passive sex-parasitism! (It is not without profound interest to note the varying phenomena of sex-parasitism as they present themselves in the animal world, both in the male and in the female form. Though among the greater number of species in the animal world the female form is larger and more powerful rather than the male (e.g., among birds of prey, such as eagles, falcons, vultures, &c., and among fishes, insects, &c.), yet sex-parasitism appears among both sex forms. In certain sea-creatures, for example, the female carries about in the folds of her covering three or four minute and quite inactive males, who are entirely passive and dependent upon her. Among termites, on the other hand, the female has so far degenerated that she has entirely lost the power of locomotion; she can no longer provide herself or her offspring with nourishment, or defend or even clean herself; she has become a mere passive, distended bag of eggs, without intelligence or activity, she and her offspring existing through the exertions of the workers of the community. Among other insects, such, for example, as certain ticks, another form of female parasitism prevails, and while the male remains a complex, highly active, and winded creature, the female, fastening herself by the head into the flesh of some living animal and sucking its blood, has lost wings and all activity, and power of locomotion; having become a mere distended bladder, which when filled with eggs bursts and ends a parasitic existence which has hardly been life. It is not impossible, and it appears, indeed, highly probable, that it has been this degeneration and parasitism on the part of the