Again, with my hunting-knife I dug a deep trench across the border of one side of the square. The ants seemed dazed at first, but rapidly adapted themselves to their new surroundings. They extended their patrol line until it embraced the entire trench; then a countless horde of yellow workers went to work, and in a day's time filled up the deep excavation level with the surrounding surface! The patrol was then reëstablished on the old line as though nothing had occurred to interrupt the ordinary routine of the colony. Before leaving the valley I dug up the nest and examined the peculiar individuals whose enforced habits give to these interesting ants the name of "honey-makers." Each one of these curious creatures was confined in a separate cell, the entrance to which was very small. Here they lived in absolute seclusion, being fed by the black workers with pollen, the nectar of flowers, tender herbs, etc. Through some wonderful chemical process this food was turned into a delicious honey, the flavor of which (I ate of it freely) was distinctly winy and aromatic. Apparently, they had no anal orifices, these passages probably having been obliterated. These imprisoned honey-makers were merely animated bags of honey, and were kept by the other ants solely for the purpose of furnishing a never failing supply of sweet and wholesome food.[81] [81] Compare Romanes, _Animal Intelligence_, p. 111 _et seq._ At the time when these details were written in my note-book I was unacquainted with Captain Fleeson's and Mr. Edwards's observations, nor had I read Romanes's work on _Animal Intelligence_. I had heard of _Myrmecocystus_, of course, but knew nothing of its natural history. Comparison will show that my observations differ from those of the gentlemen mentioned above. I saw nothing whatever of the web described by Captain Fleeson: the honey-making _solitaires_ were simply confined in cells, where they rested on the bare ground; they were not perched upon "a network of squares, like a spider's web." The "outside" workers observed by me were not black, but very dark yellow, while the "inside" workers were bright yellow in color.--W. The rapidity with which these ants set to work to fill in the trench made by my hunting-knife showed that they recognized, at once, the calamity that had befallen them, and that they used rational methods in remedying the evil. The fact that they have evolved the idea of setting aside certain members of the colony as honey-makers, and that there is a distinct recognition of a division, or divisions, in the labor of the inhabitants of the nest, evinces very high psychical development.