S-ou.lh 



SMITHSONIAN INSTITUTION. 



UNITED STATES NATIONAL MUSEUM. 



3 8- 



BULLETIN 



OF THE 



UNITED STATES NATIONAL MUSEUM. 



ISTo. 45. 



MONOGRAPH OF THE NORTH AMERICAN PROCTOTRVPIDI. 



BY 



WILLIAM H. ASHMEAD, 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1893. 



