T^NIOTD CESTODES OF NORTH AMERICAN BIRDS. 71 



Cystoidece Leuckart, 1863. 



Cystoidei Leuckakt, 1886. 



Cystoidotwniw Raillikt, 1886. 



Microtcenite Claus, 1891. 



Dipylidinw Railliet, 1896. (See Stiles, 1906n, p. 48.) 



"Dilepininw " Fuhrmann, 1907. 



Dilepidin(B Railliet and Henry, 1909. 



Subfamily diagnosis. — -Hymenolepididse : Rostellum armed, or, 

 rarely, absent. Suckers unarmed. A single set, or rarely a double 

 set, of reproductive organs in each segment. Uterus sac-like, simple 

 or lobulated, or not persistent, breaking down into numerous egg cap- 

 sules, each containing one or several eggs. Para-uterine organs not 

 developed. Adults in birds, mammals, and reptiles. 



Type- genus. — Dipylidium Leuckart, 1863. 



Genus DILEPIS Weinland, 1858. 



Generic diagnosis. — Dipylidiina? : Rostellum armed with a double 

 crown of hooks, with long dorsal and short ventral root and long 

 blade. Inner longitudinal muscle layer consisting of numerous bun- 

 dles. Genital pores unilateral. Genital canals pass dorsal of the 

 longitudinal excretory vessels and nerve. Vas deferens coiled, semi- 

 nal vesicle not developed. Testicles in medullary portion of segment 

 surrounding the female glands at the sides and behind, typically 

 numerous (40 to 50), but may be reduced in number (7). Uterus 

 sac-like, with few or numerous outpocketings. Adults in birds and 

 mammals. 



Type-species. — Tcenia angnlata Rudolphi, 1810 {^Twnia undula 

 Schrank, 1788, according to Cohn, 1901b, pp. 288-293). 



DILEPIS ATTENUATA (Dujardin, 1845) Fuhrmann, 1908. 



For description see Dujardin, 1845a, p. 566, pi. 9, fig. S ( Taenia attenuata). — Lin- 

 stow, 1875a, pp. 184-185, pi. 2, figs. 7, 8 {Tsenia attenuata). 



Hosts. — Anthus pratensis, Passer domesticus, Passer montanus. 



DILEPIS CAPRIMULGORUM Fuhrmann, 1908. 



For description see Fuhrmann, 1908b, pp. 49-50, fig. 35. 



Host. — Chordeiles virginianus. 



( ? DILEPIS) CYLINDRICA Clerc, 1903. 



For description see Clerc, 1903, pp. 337-339, pi. 10, figs. 48, 50, 52, 60. 



Host. — Larus canus. 



DILEPIS LIMOSA Fuhrmann, 1907. 



For description see Fuhrmann, 1907b, pp. 516-517, fig. 1. 

 Hosts. — NuTnenius pJiseopus, Limosa limosa. 



DILEPIS NYMPHOIDES Clerc, 1903. 



For description see Clerc, 1903, pp. 340-341, pi. 10, fig. 70. 



Host. — Pisohia damacensis. 



