1910] Proceedings. 121 



Mimosa : Also a wood borer. Makes a nest very similar to O.njbclis 

 in general characteristics, except that there is found a sharp ridge be- 

 tween the cell and the gallery. In one case a Mi mesa began its cell in 

 the debris beside a log. penetrated this and the ground underlying, 

 and the cell was found in a small piece of wood one inch by one inch, 

 buried about six inches beneath the surface. 



Trypoxilon: With these wasps we begin the consideration of 

 constructive work as well as destructive in the provision of a breeding 

 place for the young. Trypoxillon usually uses a gallery already pre- 

 pared by some other insect. Sometimes the base of the gallery is 

 filled in with mud. at other times it is not. Spiders as food for the 

 growing larva. The divisions between the cells are usually beautifully 

 molded earth. On completion of the nest the entrance is also blocked 

 with earth. 



Odynerus : Also uses cavities having already been prepared and, 

 like Trypoxilon, makes partitions of mud. Caterpillars are tb.2 prey 

 selected. In other cases Odynerus constructs its entire nest of clay, 

 placing it against the side of ^>nie convenient house, shed or tree, 

 dividing it into several cells. 



Eumenes: Goes a little further than Odynerus and provides its 

 young- with a beautifully constructed house. 



Following this we have the large, complicated structures of the 

 social wasps. ^if ' 



Dr. Earth exhibited over 30 plaster casts of nests and numerous 

 photographs of others in the course of his lecture. 



Dr. and Mrs. Peckham. Messrs. Ward, Burrill, Graenicher. Dernehl, 

 and Colles informally discussed the lecture. Upon motion the meet- 

 ing adjourned. 



Milwaukee. June 9. L910. 

 The second annual banquet was held in the Republican House, and 

 was attended by 40 members and guests. The following speakers 

 addressed the assembly : Mr. Edgar E. Teller, Mr. Geo. A. West. Mr. 

 I. N. Mitchell. Mr. Charles E. Monroe, Mr. Charles D. Whitnall, Dr. 

 Wm. Colby Pucker, Mr. Charles L. Mann. Mr. Chas. Carpenter, Dr. P. PI. 

 MeGovern, and Mr. Geo. W. Colles. President P.arth acted as toast- 

 master. 



