1907] 
Proceedings. 
165 
points. Mr. Brues then exhibited a series of plants collected by the 
Museum expedition into northern Wisconsin during* the past summer. 
He also showed a number of lantern slides illustrating the general 
aspect of the localities examined by the expedition. 
The meeting then adjourned. 
Milwaukee, Nov. 21, 1907. 
Eegnlar monthly meeting of the Society. 
President Teller in the chair and about 60 persons present. 
Dr. Geo. W. Peckham spoke on Eecent Additions to Our Knowl- 
edge of the Habits of Wasps. The speaker described the wonderful 
stinging instincts of certain wasps and then showed the advancing 
steps in the evolution of such instincts as illustrated by living species 
in different families. He was followed by Dr. S. Graenicher, who dis- 
cussed the habits of bees from the standpoint of recent discoveries. 
He dealt particularly with the locality and direction senses so fre- 
quently attributed to certain Hymenoptera. The recent concensus of 
opinion seems to be that these instincts are largely built up on indi- 
vidual experience and visual memory of objects whose position has to 
be learned by the bees. 
The meeting then adjourned. 
