DESCRIPTION OF A NEW SPECIES OF AMIDOSTOMINE 

 WORM OF THE GENUS EPOMIDIOSTOMUM FROM THE 

 GIZZARD OF ANSERINE BIRDS 



By Rudolf Wetzei. 



Of the College of Vetermary Medicine, TImxnover, Ocrtnaufi 



From the gizzard of a Canada goose {Branta canadensis cana- 

 dejms) forwarded to the Zoological Division of the Bureau of 

 Animal Industry by W. L. McAtee, of the Bureau of Biological 

 Survey, there were collected, in addition to numerous specimens of 

 Ajyiidostomjiiin anseris, a few specimens of a new trichostrongyle. 

 The worm belongs to the subfamily Amidostominae Travassos, 1919, 

 and to the genus Epomidiostomum. Skrjabin, 1916. For this species 

 the name Epoimdiostonnuin cratnA is proposed. 



An examination of the Helminthological collection of the Bureau 

 of Animal Industry showed the presence of the same species in a 

 bottle labelled No. 28959. The material was collected by E. B. 

 Cram from the gizzard of a blue goose, Chen caeruJescens, from the 

 National Zoological Park, Washington, D. C. In another bottle, 

 No. 28964, of specimens collected by E. B. Cram from a cinnamon 

 teal, Qusrquedkda cyanoptera^ also from the National Zoological 

 Park, I found another species of Epomidiostomum^ which I deter- 

 mined as Epomidiostonnum uncinatimh (Lundahl, 1848) Seurat, 1918, 

 the type species of the genus. This is the first report of E. uncina- 

 tuiri collected in America, this species being previously reported only 

 from Europe, Africa, and Asia. In view of some differences in the 

 descriptions, especially concerning the head end and the bursal rays, 

 as given by Skrjabin (1916) and by Seurat (1918), I include in this 

 paper a description of E. uncinatum based on the present material. 



The characters of the genus Epomidiostomu/tn as given by Cram 

 (1927) after Skrjabin (1916) and Seurat (1916) are as follows: 



Genus EPOMIDIOSTOMUM Skrjabin. 1916 



Figures 4-6; Figures 11-12 



Generic diagnosis. — Amidostominae: Meromyarian. Body filari- 

 form, the anterior extremity attenuate. Cuticle thick and trans- 

 versely striated. Post-cervical papillae present, but not prominent. 

 Head distinct, bearing on its dorsal and ventral surface a pair of 



No. 2864.— Proceedings U.S. National Museum. Vol. 78, Art. 21. 



23913—31 1 



