CHAMAENERIUM ANGUSTIFOLIUM. 



53 



Perfumes. — Either "Love me," "Three flowers," "Poudre azure," or 

 camphor-ball powder was sprinkled over the nectaries on half of the flowers 

 on each of four stalks. Bombus juxtus was the only visitor during the 

 hour of observation (table 40). 



Table 40. — Visits of Bombus juxtus to scented flowers. 



The difference in behavior as compared with that shown in table 39 is 

 probably to be explained by the fact that the appearance of the flower was 

 visibly changed by the powder. This also seems to furnish the reason for 

 the large number of inspections indicated in the last column. 



Flavoring extracts. — Extract of vanilla, lemon, almond, or peppermint 

 was poured on absorbent cotton and a small wad wrapped around the ovary 

 under the calyx. This changed the odor of the flower, but did not affect 

 its appearance. Visitors to normal flowers were recorded only for the first 

 experiment. All the observations were made on August 8, the first two 



Table 41. — Visitors and visits to flowers scented with extracts. 



