The whole question of sex-parasitism as it appears in these first pages of the life-histories of sexes is one of deep suggestion; and one, moreover, that casts forward sharp side-lights on modern sex problems. In some early forms, where the conditions of life are similar for the two sexes, the male and the female are often like one another. Thus it is very difficult to distinguish a male starfish from a female starfish, or a male sea-urchin from a female sea-urchin. It becomes abundantly clear that degeneration in active function, whether it be that of the male or the female, is the inevitable nemesis of parasitism. The males and females in the cases we have examined may be said to be martyrs to their respective sexes. A further truth of the utmost importance becomes manifest. Many differences between the relative position of the sexes, which we are apt to suppose are inherent in the female or male, are not inherent, in light of these early and varying types. We see that the sex-relationship and the character of the female and male assume different forms, changing as the conditions of life vary. Again and again when we come to examine the position of women in different periods of civilisation, we shall find that whenever the conditions of life have tended to withdraw them from the social activities of labour, restricting them, like these early sex-victims, to the passive exercise of their reproductive functions alone, that such parasitism has resulted invariably in the degeneration of woman, and through her passing on such deterioration to her sons, there has followed, after a longer or shorter period, the degeneration of society. But these questions belong to the later part of our inquiry, and cannot be entered on here. Yet it were well to fix in our minds at once the dangers, without escape, that follow sex-parasitism. It may be thought that these cases of sex-victims are exceptions, and that, therefore, it is unsafe to draw conclusions from them. The truth would rather seem to be that they are extreme examples of conditions that were common at one stage of life. There is no doubt that up to the level of the amphibians female superiority in size, and often in power of function, prevails.[28] If, for example, we look at insects generally, the males are smaller than the females, especially in the imago state. There are many species, belonging to different orders--as, for instance, certain moths and butterflies--in which this superiority is very marked. The males are either not provided with any functional organs for eating, or have these imperfectly developed. It seems evident that their sole function is to fertilise the female. A familiar and interesting example is furnished by the common mosquitoes, among whom the female alone, with its harmful sting, is known to the unscientific world. The males, frail and weaponless little creatures, swarm with the females in the early summer, and then pass away, their work being done.