288 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



SCHISTOROPHUS LACINIATUS (Molin. 1860) Railliet, 1916a 



Synonym. — Histiocephalus laciniatus Molin, 1860c. 



Host. — Primary : R alius cayennensis ; secondary : Unknown. 



Location. — Between tunics of gizzard. 



Morphology. — Schistorophus (p. 284) : Head discreet, encircled by 

 a fringe of slender but long, posteriorly directed processes. Mouth 

 with lips. Body slender in all parts, especially attenuated pos- 

 teriorly. 



Male 7 mm. long by 100//, wide; caudal extremity twisted in spiral, 

 with long equal alae which have 24 single papillae. 



Female 14 mm. long by 200/x wide ; anus near to caudal extremity ; 

 vulva in median part of body, not prominent. 



Life history. — Unknown. 



Distribution. — South America (Brazil). 



SCHISTOROPHUS SPINULOSUS (Molin, 1860) Railliet. 1916a 



Synonyms. — Spiroptera glareolae austriacae 10 / Filaria spinulosa 

 Molin, 18606?. 



Host. — Primary : Glareola austriaca; secondary : Unknown. 



Location. — Between the tunics of gizzard. 



Morphology. — Schistorophus (p. 284) : Head with a crown of pos- 

 teriorly directed spinous processes. Body filiform, transversely stri- 

 ated, spirally twisted ; anterior extremity noticeably attenuated. 



Male unknown. 



Female 12 mm. long by 100/a wide. Caudal extremity conical, 

 obtuse. 



Life history. — Unknown. 



Distribution. — Europe (Austria (Vienna Museum) ). 



SCHISTOROPHUS BIDENS (Rudolphi, 1819) Railliet, 1916a 



Synonyms. — Spiroptera bidens Rudolphi, 1819; Dispharagus bidens 

 (Rudolphi, 1819) Dujardin, 1845; Spiroptera denticulata Molin, 

 1860 b; Ancyr acanthus bidens (Rudolphi, 1819) Schneider, 1866. 



Llosts. — Primary: Accipiter nisus, Astur palumbarius, Falco pal- 

 mnbarius, Merops apiaster; secondary : Unknown. 



Location. — Between the tunics of gizzard. 



Morphology. — Schistorophus (p. 284) : Body very slender, attenu- 

 ated at the extremities, especially the anterior extremity; Dujardin 

 describes the body as macroscopically resembling a simple silk thread. 

 Head (fig. 353 a) rounded, separated from the body by a constriction, 

 directly posterior to which there is a wreath of 8 anteriorly directed, 

 pointed processes. These are usually adherent to the cuticle and at 

 times difficult to see. This explains the early descriptions and the 



""Catalogue of Vienna Museum. 



