But here all sorts of questions arise, which, as far as I know, have not yet been answered, and I think that the ways of these spiders ought to be more closely observed. Ants of the same nest, indeed, are quite friendly one with another, but this is not the case if they belong to different nests, whilst there is nothing but hostility, as a rule, between ants of different species. Moreover, one ant can always tell, by some means which we do not yet quite understand, whether another one belongs to its own community or not, and if it does not there is generally a fight between them, unless one of the two runs away. It would seem, therefore, as if, for its disguise to be of much use to the spider, it would have to keep not only with one species, but with one special community of ants, and even then it ought to be found out, unless it lives with them as a parasite in their nest, as some insects and other creatures do. Is this the case, or does the spider take care not to come into actual contact with the ants, so that just by looking like one at a little distance, it is left alone? But, even so, it would be only one species of ant that would be inclined to let him alone, and as other species would be hostile to the one he resembled, one can imagine inconveniences as well as benefits arising through the disguise. For the above reasons I think it would be very interesting to find out a little more about the habits of these ant-resembling spiders. Of course if they preyed upon the ants they resembled, the thing would be easy to understand. But this, as has already been said or implied, is not the case.