r} ; Psychology. 1039 
bees that came in the spring were identical with those that came 
the preceding autumn, it being possible, and indeed probable, 
that they visited the window in the second case, as they did in 
the first, by accident. 
_ The facts which we have already published with regard to the 
recollection of the properties of glass by hornets* suggest, but 
Scarcely establish, a memory of ten or twelve days’ duration. 
‘Sir John Lubbock’s observations demonstrate that bees remem- 
carefully protected from cold at night. We fed them on 
les and apple-jelly. Owing, probably, to the better care they 
strong and energetic. 
the August 25 we liberated seventeen, marked by a cut on 
‘Me left upper wing, thirty-five yards from the nest. The ma- 
ak f these flew towards the nest. A few settled on the 
„On August 26 we liberated thirteen, with both upper wings 
t thirty-five yards from the nest. They seemed to be in fairly 
condition, and flew in various directions, seyeral of them 
um into the nest, killing all the inhabitants. We the 
Bina’: the d wasps, one by one, to determinine how wigs 
» that we had marked and liberated had returned to the | 
. The result was as follows : io : 
n which had been retained fifty hours and were 4bé 
dings of the Natural History Society of, Wisconsin, pp. 121-22. 
