72 BULLETIN 69^ UNITED STATES NATIONAL MUSEUM. 



DILEPIS PAPILLIFERA Fuhrmann, 1908. 



For description see Fuhrmann, 1908b, pp. 48-49, figs. 33, 34. 

 Host: — Florida cserulea. 



DILEPIS RETIROSTRIS (Krabbe, 1869) Zschokke, 1903. 



For description see Krabbe, 1869b, pp. 282-283, pi. 5, figs. 97-99 ( Tseniaretirostris) . 



Hosts. — Arenaria interpres, Pelidna alpina. 



DILEPIS SCOLECINA (Rudolphi, 1819) Fuhrmann, 1908. 



For description see Krabbe, 1869b, pp. 280-281, pi. 4, figs. 88-90 (Txnia scole- 

 cina). 



Host. — PJialacrocorax carho. 



* DILEPIS TRANSFUGA« (Krabbe, 1869) Fuhrmann, 1908. 



For description see Krabbe, 1869b, p. 281, pi. 4, figs. 91-93 (Txnia transfuga). 

 Host. — ^Ajaia ajaja. 



DILEPIS UNDULA (Schrank, 1788) Cohn, 1900. 



For description see Volz, 1900, pp. 130-135, pi. 6, figs. 5, 6; pi. 7, fig. 7 (Dilepis 

 undulata) . 



Hosts. — Sturnus vulgaris, Turdus rnusicus, Pica pica, Corvuscorax. 



DILEPIS UNILATERALIS » (Rudolphi, 1819) Clerc, 1906. 



For description see Krabbe, 1869b, pp. 276-278, pi. 4, figs. 79-83 {Txnia unilat- 

 eralis).— Clerc, 1906b, pp. 714-715, figs. 3, 4. 



Hosts. — Butorides virescens, Casmerodius egretta, Ardea cinerea. 



DILEPIS URCEUS (Wedl, 1856) Fuhrmann, 1908. 



For description see Krabbe, 1869b, pp. 279-280, pi. 4, figs. 85-87 {Taenia urceus). 



Host. — Plegadis autumnalis. 



« This species has been collected a number of times from birds {Ajaia ajaja) dying 

 at the National Zoological Park, Washington, D. C. (Bureau of Animal Industry, 

 Helminthological Collection, Nos. 4162, 4163, 4165, 4452.) 



& This species was first described by Rudolphi (1819a, pp. 696-697). Under the 

 caption A. Ardese virescentis, he refers to a large specimen about 7 inches long and 

 several small specimens. The description which Rudolphi gives of these specimens 

 indicates that the material comprised more than one species. Krabbe (1869b) rede- 

 scribed and figured Taenia unilateralis on the basis of the small specimens in Rudol- 

 phi's original material. Fuhrmann (1906b, p. 740), who reexamined Rudolphi's 

 material, states that the species T. unilateralis belongs in Hymenolepis and is identical 

 with H. ardex Fuhrmann (1906b, pp. 451-452, figs. 37-39), the latter name falling as 

 a synonym of H. unilateralis. 



It should be noted, however,. that Hymenolepis ardese, as described by Fuhrmann 

 (1906b, p. 451), is a species of considerable size, which indicates that Fuhrmann in 

 examining Rudolphi's material did not find the "small specimens which Krabbe 

 described as T. unilateralis. As the specimens from Rudolphi's collection, which 

 Krabbe described and figured, are quite different from Hymenolepis ardeae, it is 

 evident that the type material of Taenia unilateralis originally represented more than 

 one species, Krabbe having studied one form and Fuhrmann another. As Krabbe's 

 description antedates Fuhrmann's, the species which the former author selected as 

 Taenia unilateralis should retain that name, rather than the form which Fuhrmann 

 selected. Dilepis campylancristrota (Wedl, 1856), which Fuhrmann (1908a, p. 52) 

 accepts as the appropriate name for the form described by Krabbe, falls into synonymy. 



