426 A DAY'S WORK. 



This was her last visit for the evening, making no less 

 than ninety-four visits in the day, during which time 

 only two other wasps found the honey, though it was 

 lying exposed on a table at an open window. It will 

 be seen that she worked with the utmost industry and 

 regularity. The following morning she came at 6.18 

 and made twenty visits up to 8.18, after which I did 

 not record them. During this time no stranger came. 



No doubt, however, if a wasp is put to honey in an 

 exposed place, other wasps gradually find their way to 

 it. In the preceding experiments some few, though 

 but few, did so. I then thought I would try a simi- 

 lar experiment with concealed honey. Accordingly, 

 on September, 20 I marked a wasp and put her 

 to some honey, which she visited assiduously. The 

 following morning I opened my window at 6, and she 

 made her first visit at 6.27, the temperature being 61° 

 Fahr. I then placed the honey in a box communi- 

 cating with the outside by an india-rubber tube 6 

 inches long and ^ inch in diameter. The wasp, how- 

 ever, soon got accustomed to it, and went in and out 

 without much loss of time. The 22nd was finer; and 

 when I opened my window at 6 in the morning, she 

 was akeady waiting outside, the temperature being 61°. 

 The 23rd was rather colder, and she came first at 6.20, 

 the temperature being again 61°. 



I was not at home during these days ; but, as far 

 as I could judge from watching in the mornings and 

 evenings, no other wasp found the honey. On the 

 24th I had a holiday and timed her as follows. It was 

 rather colder than the preceding days, and she did not 

 come till 6.40, when the temperature was 58° She 

 returned as follows : — 



6.49 7.22 



6.58 7.32 



7.12 7.40 



