PREFATORY NOTE. 



The present Bulletin is a double number, 3 and 4, and 

 completes Volume I. The paper by Prof. Shimek will be 

 completed in the first number of Vol. II., expected to appear 

 in December. The monograph on the Pselaphidse brings to 

 conclusion in this number the genus Bryaxis; the remaining 

 genera with illustrations will appear later. It is hoped also to 

 continue the paleontological and botanical papers as occasion 

 may offer. 



Editors^ -< 



S. Calvin, 

 T. H. McBride, 

 C. C. Nutting, 

 B. Shimek, 



H. F. WiCKHAM. 



