278 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



elliptica is a good species since the differences between it and S. 

 laticeps are minor ones or doubtful. 



Life history. — Unknown; probably involves intermediate stages in 

 other hosts. 



Distribution. — Europe (Italy (Padua)). 



SYNHIMANTUS HAMATA (Linstow, 1877) Skrjabin, 1924 



Synonyms. — Dispharague de l'epervier of Dujardin, 1845; Filaria 

 hamata Linstow, 1877; Dispharagus hamatus (Linstow, 1877) Stos- 

 sich, 1891; Acuaria hamata (Linstow, 1877) Railliet, Henry, and 

 Sisoff, 1912. 



3M 



Figs. 343-344. — 343, Synhimantus elliptica. Male tail. After Molin, 1861. 

 344, synhimantus hamata. a, head end. aptek linstow, 1879. h, male 

 tail. After Linstow, 1877 



Hosts. — Primary : Falco nisus, Astur nisus, Nisus communis, Buteo 

 vulgaris; secondary : Unknown. 



Location. — Stomach (Gizzard ? ) . 



Morphology. — Synhimantus (p. 272) : Mouth with 2 conical lips. 

 Cordons (fig. 344a) recurrent and anastomosing. Cuticula trans- 

 versely striated. 



Male 6 mm. long by 300/* wide. Buccal cavity 180/* long; esoph- 

 agus 720/* long. Cordons extend posteriorly 280/* from head end and 

 anastomose 140/* from head end. Right spicule 720/* long, the free 

 end shaped like a fishhook; left spicule 190/* long, comparatively 

 thick and blunt. Four pairs of preanal and 4 pairs of postanal 

 papillae (fig. 3446), and in addition 4 small papillae in a somewhat 

 arched transverse row just anterior to tail end. Gendre notes that 

 these differences in the papillae and in the spicule tip are the only 

 differences between this species and S. laticeps. 



