PAEASITIC NEMATODES FROM TONKIN, INDO-CHINA, 

 INCLUDING A NEW SPECIES OF ASCARIDIA 



By Benjamin Schwartz 



Of the Zoological Division, Bureau of Animal Industri/, United States Depart- 

 ment of Agriculttire 



The following report is based on a small collection of nematodes, 

 largely from domestic animals, received from Maj. E. Houdemer,. 

 Chief of the Clinic at the Ecole Veterinaire at Hanoi (Tonkin) 

 Indo-China. In addition to a new species of Ascaridia from the 

 goose which is described in this paper, there were found a species 

 of Rictularia from a rat which is probably a new species, and speci- 

 mens of the genus Porrocaecum from a heron (genus and species 

 unknown) which require further study. 



Superfamily OXYUROIDEA 



Family OXYURIDAE 



Genus OXYURIS Rudolphi, 1803 



OXYURIS EQUI (Schrank, 1788) 



Hos t. — Equ US cah a Ihis . 

 Location. — Unknown. 



Only short-tailed forms were found, but Major Houdemer states 

 that long-tailed forms also occur in horses in Tonkin. 



Superfamily ASCAROIDEA 

 Family ASCARIDAE 



Genus ASCARIS Linnaeus, 1758 



ASCARIS LUMBRICOIDES Linnaeus. 1758 



Host. — Homo sapiens. 



The specimens which are sexually immature were vomited by a 

 breast fed infant (native) only two months old. 



No. 2538. — Proceedings U. S. National Museum, Vol. 66, Art. I. 



23549—25 1 ' 1 



