The United States National Museum (USNM) is the former name for the
National Museum of Natural History (NMNH), a Smithsonian Museum.  The
acronym, USNM, is still used as the standard code in refering to cataloged
objects/specimens at the NMNH.  Many researchers still refer to the NMNN
as the USNM.
 
Now to address the question... the NMNH has a large staff, close to
500 people, so let me know if you need to contact a specific person
or department and I'll send that info to you, otherwise someone in
the Director's Office can help you at:
           phone: (202) 357-2664
           fax:   (202) 357-4779
 
           address:  Director's Office, MRC 106
                     National Museum of Natural History
                     10th & Constitution, NW
                     Washington, DC  20560
 
Good luck!
 
Lisa Palmer, Museum Specialist
NMNH, Division of Fishes
[log in to unmask]
 
Lisa Palmer:   [log in to unmask]
National Museum of Natural History
Division of Fishes
Washington, DC  20560