Bull. Ent. Research. Vol. IV. Part 2. 



Plate XI. 



[P/iotos by Townscnd and Rust. 



VERRUGAS BRIDGE of the Central Railway across Verrugas Canyon, 5,840 ft., the 

 building of which cost the lives of thousands of workmen by verruga. Lower figure, 

 from mouth of canyon ; middle, from up canyon ; upper, first waterfall above bridge. April. 



