hollow interior was 

 filled with sm all 

 maggots, whereas, 

 generally speaking, 

 unparasitized galls 

 contain a large 

 maggot nearly fill- 

 ing the cavity. 

 Dr. Felt considers 

 the gall not a well- 

 known one, and 

 from ordinary 

 standards some- 

 what rare. The 

 specimens observ- 

 ed August 6 are 





shown at the upper 

 part of the figure. 

 On September 7, 

 when the photo- 

 graph was taken, 

 these were wither- 

 ing, and the two 

 new ones shown 

 below had devel- 

 oped. Close ex- 

 amination of the 

 bark of the callus 

 with a lens revealed 

 punctures and of- 

 ten slight swellings 

 at other points. 



Galls caused primarily by Andricus ventricosus Bass, on callus surrounding old 

 fire scar on trunk of scarlet oak {^uercus coccinea Muench.). 



