280 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



(Linstow), its free end peculiar, a digitiform process projecting 

 from a collarlike expansion. 



Female 12.2 to 12.8 mm. long (Stossich) or 9.5 mm. long (Lin- 

 stow) by 310 to 410ft wide. Pharynx 280 to 310/i long; anterior 

 esophagus 1 mm. long; posterior esophagus 3.5 to 3.6 mm. long. 

 Cordons extend 610/* from head end and anastomose 330/u, from head 

 end. Tricuspid papillae 770/* from head end. Posterior extremity 

 in a hyaline cylindrical sheath formed from the cuticula (fig. 

 345 /) . Vulva immediately anterior to anus on a central prominence 

 which is the real extremity of the body as the small conical tail 

 projects dorsally from there. Eggs 27 to 29/x by 18 to 19/z. 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — Europe (Germany (Langenburg) and Corsica) 

 and Africa (Algeria and French Guinea (Labe)). 



SYNHIMANTUS RECTA (Molin, 1860) Gendre. 1920 



Synonyms. — Dispharfrgus rectus Molin, 1860c/ Spiroptera fal- 

 conis 9 Molin, 1860; Acuaria recta (Molin, 1860) Railliet, Henry, and 

 Sisoff, 1912; C heilospirura recta (Molin, 1860) Stiles and Hassall, 

 1920. 



Hosts. — Primary : Falco femoralis, F. unicinctus; secondary : Un- 

 known. 



Location. — Stomacli (gizzard ? ) 



Morphology. — Synhimantus (p. 272) : Two conspicuous papilla- 

 like lips. Body straight, transversely striated. According to Molin, 

 the cordons are equal, flexed, recurrent, and joined in pairs ; Drasche 

 states that they are not wavy ; Gendre (1921«) states that from Molin's 

 description of the cordons the species belongs in Synhimantus and 

 not in C heilospirura where Railliet, Henry, and Sisoff placed it ; the 

 present writer concurs with Gendre in his interpretation of Molin's 

 description. 



Male 9 mm. long by 100/* wide. Posterior extremity (fig. 346) 

 rolled spirally. Caudal alae long and wide. Four pairs of peduncu- 

 lated preanal and 6 pairs of postanal papillae, the latter in 2 groups, 

 a group of 2 pairs just posterior to cloacal aperture and a group of 

 4 pairs in the posterior half of the alae; this arrangement constitutes 

 the chief difference between this species and S. subrecta. Right 

 spicule short and thick; left spicule four times as long, sharp and 

 alate. 



Female 7 to 10 mm. long by 100 to 300/i wide. Posterior extremity 

 straight, the anus not far from the tail end. Vulva in posterior 

 part of body. 



• Catalogue of Vienna Museum. 



