NO. 1105. PROCEEDINGS OF THE NATIONAL MUSEUM. 215 



7. Genital pores single 8 



Genital pores double; vagina ventral of cirrus pouch on both sides of the seg- 

 ment Cittotcenia (p. 170), 19 



8. Pores unilateral; testicles unilateral, or nearly so, in median field. 



Anoplocephala (p. 150), 11 



Pores regularly or irregularly alternate; testicles extend ncrosg the median field 

 (not shown as yet for B. studeri and B. satyri) Bertia (p. 160), 14 



9. Genital pores irregularly alternate with marked tendency to unilaterality ; 



pedunculated round or elongate prostatic gland near ventral canal on pore side 

 of segment; dorsal canal lies dorsal to dorso (? lateral) of ventral canal. 



Andrya (p. 154), 26 



Genital pores double; pedunculated prostatic gland absent; vagina ventral of right 

 cirrus and dorsal of left cirrus Moniezia. 1 



10. Uterus single, transverse, but undulate, with asconspore or cornucopia-like egg pouches; 



genital pores single or double; testicles form a band in median field or are divided 



into two lateral groups, one in each lateral field Thysanosoma.* 



Uterus single and transverse, or double, being represented by a cornucopia-UTce pouch 

 on each side of the segment; genital pores irregularly alternate; testicles in two lat- 

 era I groups and absent from median line Stilesia.* 



Anoplocephala. 



11. Head with posterior lobes; body may attain 8 to 25 mm. long by 3 to 15 mm. wide; 



head 2 to 3 mm. broad. Host: Horse (Equus caballus) A.perfoliata. 



Head without posterior lobes 12 



12. Head 4 to 6 mm. broad; strobila 9 to 80 cm. long by 5 to 20 mm. broad. Host: Horse 



(Equus caballus) and Mule (Equus asinus X caballus) A.plicata. 4 



Head less than 1 mm. broad 13 



13. Strobila 10 mrn. long by 1.5 to 2.25 mm. broad; contains 10 to 28 segments; 



distal segments may become nearly as long as broad; genital glands confined 

 to proximal third of worm ; testicles 15 to 30 111 each segment ; cirrus pouch 

 0.48 mm. long. Host: European rabbit (Lepus cuniculus) and Mountain hare 

 (L. variabilis) A. wimerosa. 



Strobila attains 6 to 30 mm. long by 4 to 6mm. broad; 35 to 53 segments present, the 

 distal 4 to 8 completely filled with ova; testicles 60 to 100 in each segment; cirrus 

 pouch attains 0.8 mm. in length. Host: Horse (Equus caballus). 



A.mamillana (p. 153)' 



Strobila 10 to 16 cm. long by 6 to 8 mm. broad; 60 to 80 testicles present. Host: 

 Arctomys, sp A. transversaria (p. 154). 



1 1891, Moniezia, R. BLANCHARD, Me"m. Soc. zool. France, IV, p. 187. Type, Twnia 

 expansa, Rudolphi, 1810. 



For the species of this genus see Stiles & Hassall, 1893, A Revision of the Adult 

 Cestodes of Cattle, Sheep, and Allied Animals, Bull. 4, Bureau of Animal Industry, 

 U. S. Dept. Agriculture. 



>2 1835, Thysanosoma, DIESING, Med. Jahrb. d. ost. Staat. n. Folge, VII, pp. 105-111, 

 pi. in. Type, Thysanosoma actinioides, Diesing, 1835. 



For the species of this genus see Stiles in Stiles & Hassall, 1893, Bull. 4, Bureau 

 of Animal Industry. 



3 1893, Stilesia, RAILLIET, Traite de Zool. me'd.'et agric., I, pp. 277-278. Type, Tcenia 

 globipunctata, Rivolta, 1874. 



For the species of this genus see Stiles in Stiles & Hassall, 1893, Bull. 4, Bureau 

 of Animal Industry. 



4 Doubtful whether this specific term should stand, as it is antedated by equina, 

 1781, and magna, 1789. 



