} 
1887. | BOTANICAL GAZETTE. 249 
well known that they wipe loose pollen from the hairy sur- 
face of their bodies to apply it to their pollen collecting 
apparatus. (2) I have seen Bombus vagans, after visiting - 
several flowers of Triosteum perfoliatum, stop and brus 
* Pollinia of Agclepias Sullivantii, which were extriased abd exposed to the air on 
bad 23. were inserted into the stigmatic chambers on July 7, two weeks after extraction, 
emitted pollen tubes. 
