T^NIOID CESTODES OF NORTH AMERICAN BIRDS. 81 



in the anterior third of the segment. Genital canals pass dorsal of 

 excretory vessels and nerve. Testicles about 18 in number, located 

 posterior of the female glands. Vas deferens much coiled, in the 

 anterior portion of the segment, without vesicular enlargement. 

 Ovary a simple sac, median, in anterior half of segment. Yolk 

 gland a simple sac posterior of ovary. Uterus thin-walled, much 

 lobulated, occupying most of the medullary portion of the gravid 

 segment. Outer shell of the egg with a tubular prolongation at each 

 pole terminating in a globular expansion. Adults in birds, 



Tyj^e-species. — Liga punctata "- (Weinland, 1856) Weinland, 1857= 

 Liga hrasiliensis (Parona, 1901) Ransom, 1909. 



*LIGA BRASILIENSIS (Parona, 1901) Ransom, 1909. 



For description see Fuhrmann, 1907b, p. 521, fig. 12 {Fuhrmannia hrasiliensis). — 

 Ransom, 1909, pp. 22-25, figs. 9-14 (the present paper). 



Host. — *Golaptes auratus. 



Genus LEPTGT.^NIA Cohn, 1901. 



Generic diagnosis. — Dipylidiinse : Scolex relatively very large. 

 Rostellum armed with a single crow^n of hooks with long dorsal root 

 and short ventral root, and rather short blade. Neck absent. Seg- 

 ments few (12 to 15). Genital pores regularly alternate. Repro- 

 ductive organs protogynous in development. Testicles rather numer- 

 ous (12 to 15), lateral in position toward the pore side of segment. 

 Cirrus pouch and cirrus very long. Uterus sac-like, fills entire gravid 

 segment. Adults in birds. 



Type-species. — Leptotsenia iscTinorhyncJia (Liihe, 1898) Cohn, 1901. 



Genus PARVIRQSTRUM & Fuhrmann, 1907. 



Generic diagnosis. — Dipylidiinse : Strobila small, division into seg- 

 ments not well marked. Scolex large, rostellum small, armed with 

 double crown of hooks. Genital pores irregularly alternate. Repro- 

 ductive glands very small. Testicles in lateral portions of segment. 

 Ovary and yolk gland toward pore side of segment. Uterus sac-like. 

 Adults in birds. 



Type-species. — Parviro strum reticulatum Fuhrmann, 1908. 



Genus CYCLUSTERA Fuhrmann, 1901. 



Generic diagnosis. — Dipylidiinse : Rostellum with double crown of 

 hooks. Longitudinal musculature in three layers. Genital pores regu- 



« As Liga punctata is invalid (see p. 21), and Liga hrasiliensis is the next available 

 name, the latter is the correct designation of this species. 



b This genus was first mentioned without description or designation of type by 

 Fuhrmann in 1907 (1907a, p. 292), and was first described in 1908 (1908b, p. 60), 

 P. reticulatum being the only species. 



3264— Bull. 69—09 6 



