TREASURY DEPARTMENT. 
Public Health and Marine-Hospital Service of the United States. 
Walter Wymax, Surgfeon-General. 
HYGIENIC LABORATORY.— BULLETIN No. 18. 
WL. J. ROSEXAU, Director. 
September, 1904. 
An account of the Tapeworms of the genus 
Hymenokpts parasitic in man^ 
INXLUDING 
Reports of several new cases of the Dwarf Tapeworm 
{H* nana.) in the United States. 
BY 
B. RAXSONl. 
WASHINGTON: 
GOVERNMENT PRINTING 
1904. 
OFFICE. 
