NORMAL AND EXPERIMENTAL POLLINATION. 



sachet. Clisodon terminalis flew above the flowers scented with "Arbutus" 

 powder for some little time before landing, projecting its ligule, which was 

 not its normal procedure when hovering above flowers. One Bombus 

 juxtus landed on flowers powdered with both kinds of sachet, but quickly 

 flew away. Syrphus opinator alighted on some with "Love me" sachet 

 on them and worked as usual. It also landed on flowers with honey-drops 

 but did not find the honey. 



Camphor. — The response of the various species to flowers in which 

 powdered "moth balls" had been sprinkled on the stamens and to normal 

 flowers is shown in table 20. 



Table 20. — Visitors to normal flowers and flowers scented with camphor. 



It is somewhat surprising to find that the flowers with an unpleasant 

 odor attracted half as many visitors as the normal ones, but this is probably 

 to be explained on the basis of habit. 



Cotton perfumed with anise was wound around the pedicels under the 

 sepals in 8 pairs of flowers, normal flowers adjoining the scented ones 

 in each case, and the observations covering an hour. The response to 

 anise was essentially the same as that to camphor. 



Table 21. — Visitors to normal and anise-scented flowers. 



SUMMARY. 



As would be expected from their similar size and structure, the rose and 

 salmonberry yielded much the same experimental results. The reduction 

 of the corolla decreased the visits to the one 3 and to the other 4 times, while 

 in both cases flowers with stamens masked obtained but few visits. The 

 visitors to paper flowers were much more numerous in the case of Rubus, 

 but this was probably due in part at least to the more extensive experiments 

 with it. The reverse was true in the case of flowers with added honey, the 



