T^ENIOID CESTODES OF NORTH AMEKIGAN BIRDS. 87 



nerve. Testicles few (5 to 10) or more numerous (15 or more), 

 dorsal of female glands and toward anterior border of segment. 

 Ovary and yolk gland, small, ovoid in shape, in middle of segment. 

 Uterus simple, sac-like, median, or displaced toward side of segment 

 opposite genital pore, its antero-posterior axis assuming a diagonal 

 and sometimes a transverse position. In front of or lateral of uterus 

 a para-uterine organ develops into which the eggs finalh^ pass. Adults 

 in birds. 



Type-species. — Anonchotsenia clava°' Cohn, 1900 = AnonchotsRnia 

 glohata. (Linstow, 1879). 



*ANONCHOT.ffiNIA GLOBATA (Linstow, 1879) Fuhrmann, 1908. 



For description see Cohn, 1901b, pp. 392-399, pi. 33, figs. 66-68; pi. 34, figs. 

 69-73 {A. clava). — Cerruti, 1901a, pp. 1-6, figs. 1-11 (Amerina alaudse). — 

 Fuhrmann, 1908c, pp. 623-626, figs. 1-71.— Ransom, 1909, pp. 34-36, fig. 27 

 (tlie present paper). 



Hosts. — Alauda arvensis, *Dendroica striata, ^ Melospiza melodia, 

 Passer domesticus, Passer montanus, jSgiothus linaria, Loxia curvi- 

 rostra. 



ANONCHOT^NIA LONGIOVATA (Fuhrmann, 1901) Fuhrmann, 1908. 

 For description see Fuhrmann, 1908c, pp. 627-629, figs. 8-11. 



Host. — fPlegadis guarauna. 



ANONCHOT.ffi:NIA MACROCEPHALA Fuhrmann, 1908. 

 For description see Fuhrmann, 1908c, p. 629, fig. 13. 



Host. — Progne subis. 



ANONCHOT.ffiNIA, species. 



Mentioned by Fuhrmann, 1908a, p. 188; 1908c, p. 631. 

 Host. — Tyrannus melancholicus . 



Genus METROLIASTHES Ransom, 1900. 



Generic diagnosis. — Paruterininse : vScolex unarmed, v/ithout ros- 

 tellum. Genital pores irregularly alternate. Genital canals pass 

 between dorsal and ventral longitudinal excretory vessels and dor- 

 sal of the nerve. Testicles rather numerous (20 to 40), in posterior 

 portion of segment. Uterus single in origin and consisting, when 

 fully developed, of two spherical sacs touching in the median line 

 and more or less fused with one another. A para-uterine organ, 

 developing in front of the uterus, and into which the eggs pass, 

 becomes transformed finally into a spherical egg capsule. Adults 

 in birds. 



Type-species. — Metroliasihes lucida Ransom, 1900. 



a Fuhrmann (1908a, p. 70; 1908c, p. 623) has shown that Anonchotsenia clava is identical 

 with Tsenia glohata Linstow, 1879, hence Anonchotsenia globata is the correct name of 

 this species. 



