At 6.50 a bee came out through the little postern door. After she had fed, she evidently did not know her way home; so I put her back. At 7.10 she came out again. I again fed her and put her back. At 10.15 she came out a third time; and again I had to put her back. At 10.55 she came out again, and still did not remember the door. Though I was satisfied that she really wished to return, and was not voluntarily remaining outside; still, to make the matter clear, I turned her out of a side window into the garden, when she at once returned to the hive. At 11.15 she came out again; and again I had to show her the way back. At 11.20 she came out again; and again I had to show her the way back (this makes five times); when, however,-- At 11.30 she came out again after feeding, she returned straight to the hive. At 11.40 she came out, fed, and returned straight to the hive. At 11.50 she came out, fed, and returned straight to the hive; she then stayed in for some time. At 12.30 she came out again, but seemed to have forgotten the way back; after some time, however, she found the door and went in. Again:--August 24 at 7.20 a bee came through the postern: I fed her; and though she was not frightened or disturbed, when she had finished her meal she flew to the window and had evidently lost her way; so at 8 o'clock I in pity put her back myself. August 29.--A bee came out to the honey at 10.10; at 10.12 she flew to the window, and remained buzzing about till 11.12, when, being satisfied that she could not find her way, I put her in. Nay, even those who seemed to know the postern, if taken near the other window, flew to it, and seemed to have lost themselves. This cost me a great many bees. Those which got into my room by accident continually died on the floor near the window. These observations show that even when a bee is not _carried_ from the hive to the honey, but herself _flies_ to it, her sense of direction is not alone sufficient to enable her to find the way back to the hive--or, rather, to the unaccustomed entrance to the hive from which she had come out. Probably if the side window had been open, the bee would have returned to the hive round the corner of the house, and through the entrance to which she was most accustomed. But as it was she had to _learn_, by five or six journeys, the way between the postern entrance and the food. But the following observation on a wasp is in this connection the most conclusive. A marked wasp visited honey exposed in the room before mentioned. 'The next morning she came--