T^NIOID CESTODES OF NORTH AMEEICAN BIRDS. 61 



TETRABOTHRIUS UMBRELLA (Fuhrmann, 1899) Fuhrmann, 1908. 



For description see Fuhrmann, 1899b, p. 871 {ProstJiecocotyle umbrella). 

 Hosts. — Diomedea exulans., Phmhetria paljjehrata. 



TETRABOTHRIUS, species. 



Listed by Fuhrmann, 1908a, p. 136. 

 Host. — Sula hassana. 



Family MESOCESTOIDID^ Fuhrmann, 1907. 



Mesocestoiclince Luhe, 1894. 

 Mesocestoidce Ariola, 1899. 

 Family diagnosis. — Tsenioidea : Scolex without rostellum or hooks. 

 Suckers unarmed. A single set of reproductive organs in each seg- 

 ment. Genital pores located in the ventral surface of the segment. 

 Vagina opens in front of or beside the cirrus pouch. Eggs in gravid 

 segments inclosed in a single thick-walled egg-capsule. Adults in 

 mammals and birds. 



Type-genus. — Mesocestoides Vaillant, 1863. 



Genus MESOCESTOIDES Vaillant, 186S. 



Monodoridium Walter, 1866 (type, Taenia utriculifera Walter, 1866). 



Ptychophysa Hamann, 1885 (type, Tcenia canis-lagopodis Rudolphi, 1810). 

 Generic diagnosis. — Mesocestoididse : With the characters of the 

 family. Adults in mammals and birds. 



Type-Sfecies. — Mesocestoides amhiguus Vaillant, 1863. 



MESOCESTOIDES ALAUD.ffi: Stossich, 1896. 



For description see Stossich, 1896a, p. 133. 

 Host. — Alauda arvensis. 



MESOCESTOIDES PERLATUS (Goeze, 1782) Muhling, 1898. 



For description see MtJHLiNG, 1898b, pp. 105-108.— Volz, 1900, pp. 156-157. 

 Hosts. — Cerchneis tinnunculus., Aquila chrysaetos. 



Family ANOPLOCEPHALID^ Fuhrmann, 1907. 



Family diagnosis. — Tsenioiclea : Scolex unarmed, without rostellum. 

 Suckers relatively large, unarmed. Neck absent. Segments usually 

 broader than long. A single or double set of reproductive organs in 

 each segment. Genital pores marginal and bilateral, unilateral, or 

 irregularly alternate or (?) absent. Testicles numerous or rarely 

 {THplotcenia) one in each lateral half of the segment. Median axis 

 of female glands lateral of the median axis of the segment. Uterus 

 persistent, and transversely elongated, either tubular, sac-like, 

 branched or reticular; or not persistent, replaced by ^^g capsules 

 whose formation may or may not be preceded by the appearance of 

 para-uterine organs. Egg with thin transparent shells with or with- 

 out a pyriform apparatus. Adults in mammals and birds. 



Type-genus. — Anoplocephala E. Blanchard, 1848. 



