T^NIOID CESTODES OF NORTH AMERICAN BIRDS. 99 



DIORCHIS PARVICEPS (Linstow, 1872) Linstow, 1904. 



For description see Linstow, 1872d, p. 57, pi. 3, figs. 11, 12 {Taenia parviceps); 

 1904n, pp. 306-307, pi. 13, figs. 23-25. 



Host. — Mergus serrator. 



Genus APLOPARAKSIS Clerc, 1903. 



Monorchis Clerc, 1902 (type, M.filum (Goeze, 1782); not Monorchis, Trematoda). 

 Shorikowia Linstow, 1905 (type, S. clausa Linstow, 1905^AploparaJcsis brachy- 

 phallos (Krabbe). (See Fuhrmann, 1908a, p. 82). 



Generic diagnosis. — Hymenolepidinse : Strobila small and slender. 

 Rostellum armed with a single crown of hooks, with ventral root as 

 long or nearly as long as the blade. Suckers unarmed. One testicle, 

 dorsal. Seminal vesicle large. Adults in birds. 



Type-species. — Aploparaksis filum (Goeze, 1782) Clerc, 1903. 



APLOPARAKSIS BIRULAI Linstow, 1905. 



For description see Linstow, 1905dd, p. 8, pi. 2, figs. 26-28. 



Host. — Somateria spectabilis. 



APLOPARAKSIS BRACHYPHALLOS (Krabbe, 1869) Fuhrmann, 1908. 



For description see Krabbe, 1869b, pp. 310-311, pi. 8, figs. 193, 194 (Taenia 

 hrachyphallos). 



Hosts. — Aegialitis hiaticula, Calidris leucophsBa, Pisohia damacensis, 

 Pelidna alpina, Arquatella maritima, Tringa canutus. 



APLOPARAKSIS CIRROSA (Krabbe, 1869) Clerc, 1903. 



For description see Krabbe, 1869b, p. 308, pL 7, figs. 182-185 {Taenia cirrosa). — 

 Clerc, 1903, pp. 269-271, pi. 8, fig. 14. 



Hosts. — Larus canus, Larus minutus, Sterna Tiirundo. 



APLOPARAKSIS CRASSIROSTRIS (Krabbe, 1869) Clerc, 1903. 



For description see Krabbe, 1869b, p. 314, pi. 8, figs. 202-204 {Taenia cras- 

 sirostris). —G-LERC, 1903, pp. 265-267, pi. 8, fig. 20. 



Hosts. — Hsematopus ostralegus, Squatarola squatarola, Aegialitis 

 hiaticula, Machetes pugnax, Pisohia damacensis, Pelidna alpina, Gal- 

 linago gallinago, Scolojjax rusticola, Lohipes lohatus. 



APLOPARAKSIS DIMINUENS Linstow, 1905. 



For description see Linstow, 1905dd, pp. 8-9, pi. 2, figs. 29-31. 

 Host. — Phalaropus fulicarius . 



APLOPARAKSIS DUJARDINII (Krabbe, 1869) Clerc, 1903. 



For description see Krabbe, 1869b, pp. 319-320, pi. 9, figs. 223-225 {Taenia 

 dujardinii). — Fuhrmann, 1896k, pp. 436-442, pi. 14, figs. 1-4 {Txnia dujar- 

 dini). — Clerc, 1903, pp. 274-275 {A. dujardini). 



Hosts. — Sturnus vulgaris, Turdus musicus. 



APLOPARAKSIS FILUM (Goeze, 1782) Clerc, 1903. 



For description see Krabbe, 1869b, pp. 312-313, pi. 8, figs. 198-201 {Txnia 

 filum).— Clerc, 1903, pp. 257-263, figs. 1, 2, pi. 8, figs. 11, 15. 



Hosts. — Arenaria interpres, Limosa limosa, Totanus totanus, Helo- 

 dromas ochropus. Machetes pugnax, Pisohia damacensis, Pelidna alpina, 

 Gallinago media, Gallinago gallinago, Scolopax rusticola, LohijJes lohatus. 



