i.] INDUSTRY OF BEES AND WASPS. 11 



Came again at 7.37, and returned at 7.42 



7.56 8.3 



8.11 8.14 



8.20 8.24 



8.31 8.34 



8.40 8.42 



8.50 8.52 



8.58 9 



9.8 9.11 



9.18 9.22 



9.30 9.32 



9.39 9.40 



9.50 9.54 



10.1 10.5 



10.14 10.17 



10.25 10.28 



10.37 ,, 10.40 



10.47 10.51 



11 11.6 



11.17 11.20 



11.34 11.37 



11.50 11.53 



12.5 12.8 



and so on till six in the evening. Thus working 

 twelve hours like a man, and performing more than 

 fifty journeys to and fro. 1 This, however, was in 



1 Mr. Darwin, in his last work, has brought forward some strik- 

 ing evidence how rapidly bees work. They visit, it appears, 

 twenty flowers in a minute, and so carefully do they economise the 

 sunny hours, that in flowers with several nectaries if they find one 

 dry, they do not waste time by examining the others on the same 

 plant. Mr. Darwin watched carefully certain flowers, and satisfied 

 himself that each one was visited by bees at least thirty times in 

 a day. The result is, that even where flowers are very numerous 

 as, for instance, on heathy plains and clover fields every one is 

 visited during the day. Mr. Darwin has carefully examined a 

 large number of flowers in such cases, and found that every single 

 one had been visited by bees. 



