At 3.20 a friend was taken into the nest. 3.35 a stranger was taken into the nest, but afterwards brought out again and thrown into the water. 4. 5 I put out four more friends and as many 5.24 afterwards brought out and thrown into the water. taken into the nest, but afterwards brought out and thrown into the water. 5.55 a friend was thrown into the water. 6. 8 a friend was taken into the nest. 6.30 a stranger was dropped into the water. 8. 5 a friend was taken into the nest. In this case two friends were thrown into the water and seven taken into the nest; while six strangers were thrown into the water and four were taken into the nest ; all of these, however, were afterwards brought out again and thrown away. December 8.-Experimented with six friends and six strangers, beginning at 11.30 I then put four more of each, and as a friend or a stranger was carried off, replaced her by another. At 12.45 a friend to the water. 12.58 a stranger was dropped into the water. All these ants appeared quite insensible. Altogether sixteen friends were taken to the nest and five thrown into the water, while of the strangers only three were taken to the nest, and fifteen were thrown into the water. Moreover, as in the preceding observation, even the three strangers which were at first taken to the nest were soon brought out again and thrown away; while this was not the case with any of the friends as far as we could ascertain, though we searched diligently for them also. In this case also all the intoxicated ants were motionless and apparently insensible. January 15.-Repeated the same experiment, beginning at 12.20. Up to 7 P.M. not one of the intoxicated ants had been moved. At 8.20 we found a stranger in the water, at 9.30 another, and at the following morning a third. The others were untouched. January 17.-Repeated the same experiment, beginning at 11.30. At 12 a friend was carried to the nest. 12.20 a stranger was dropped into the water. 12.40 a stranger was dropped into the water 12.45 a friend was carried to the nest. 2.30 a stranger was dropped into the water. Thus, then, the general results were that the ants removed forty-one friends and fifty-two strangers. Of the friends, thirty-two were carried into the nest and nine were thrown into the water. Of the strangers, on the contrary, forty-three were thrown into the water; only nine were taken into the nest, and seven of these were shortly afterwards brought out again and thrown away. Indeed, I fully believe that the other two were treated in the same manner, though we could not satisfy ourselves of the fact. But it was only by very close observation that the seven were detected, and the other two may well have escaped notice. It seems clear, therefore, that even in a condition of insensibility these ants were recognised by their friends. |