Walter Wyman, Surgreon-General. 
HYGIENIC LABORATORY.— BULLETIN No. 13. 
Ivl. J. ROSBNAU, Director. 
May, 1903. 
A STATISTICAL STTUDY OF THE INTESTINAL PARASITES 
OF 500 'WHITE MALE PATIENTS AT THE UNITED 
STATES GOVERNMENT HOSPITAL FOR THE INSANE. 
By Philip E. Garrison, Brayton H. Ransom, 
AND Earle C. Stevenson. 
'mm 
A PARASITIC ROUNDWORM (Affamomermis calicts a. n, sp.) 
IN AMERICAN MOSQUITOES {Culex solUctians). 
By Ch. Wardell Stiles. 
THE TYPE SPECIES OF THE CESTODE GENUS Hymenokpts. 
By Ch. Wardell Stiles. 
