NEW HELMINTH PAEASITES FROM CENTRAL 

 AMERICAN MAMMALS 



By Emmett W. Price 



Zoological Division, Bureau of Animal Industry, United States Department of 



Agriculture 



Among some specimens forwarded to the Bm-eau of Animal In- 

 dustry by Mr. Harold W. Brown of Johns Hopkins University, Bal- 

 timore, Md., were a few specimens of small nematodes which had been 

 collected from the small intestine of a three-toed sloth, Bradypus 

 sp., at Penonome, Panama, July IT, 1926. The specific identity of 

 the host is doubtful, since Miller (1924) lists three species of three- 

 toed sloths, Bradypus castamceps, B. griseus, and B. ignavus^ from 

 Central America. The nematodes belong in the family Trichostron- 

 gylidae Leiper, 1912, and subfamily Trichostrongylinae Leiper, 1908, 

 two species being represented. One species appears to belong to a 

 new genus, for which the name Brady postrongylm is proposed ; the 

 other species is placed in the genus Grapliidium Railliet and Henry, 

 1909. 



In this paper there is also described a species of trematode which 

 was collected by the writer from the gall bladder of a gray spider 

 monkey, Ateles geoffroyi, which died in the National Zoological Park, 

 Washington, D. C, October 8, 1926. This animal had been received 

 from Nicaragua about two years previously. Since conditions in the 

 monkey house are such as to practically preclude the acquirement of 

 a trematode infestation, it is assumed that the infestation must have 

 been acquired by the monkey before its arrival here, and presumably 

 was acquired in Central America. This trematode belongs in the 

 family Dicrocoeliidae Odhner, 1910, but owing to the peculiar ar- 

 rangement of the testes, it has not been possible to allocate this species 

 to any existing genus. The new genus Gontrorchis is, therefore, pro- 

 posed for it. 



NEMATODA 



Family TRICHOSTRONGYLIDAE 



BRADYPOSTRONGYLUS, new genus 



Generic diagnosis, — Trichostrongylinae: Cephalic cuticle inflated 

 and coarsely striated. Oral aperture simple; esophagus slender, 

 varying little in diameter. Bursa of male with two large lateral 



No. 2725.— Proceedings U. S. National Museum, Vol. 73, Art. 4. 



77068—28 1 



