262 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Female 9 to 10 mm. long by 25 to 102/* wide. Pharynx 37;/. long. 

 The characteristic caudal extremity (fig. 325 c) consists of a caudal 

 appendage 85/a long rounded in an obtuse manner and attached to 

 the body at an obtuse angle. Vulva (fig. 3256) slightly posterior 

 to the middle of body, 4.08 mm. from tail end. Eggs 44 to 48/x long 

 by 30yu wide, and thick shelled. 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — South America (Brazil) and Asia (Russian Turke- 

 stan). 



SCIADIOCARA SECUNDA Skrjabin, 1916b 



Hosts. — Primary : Corvus monedula; secondary 

 Location. — Between tunics of gizzard. 



Unknown. 



Figs. 324-325. — Sciadiocaea umbellifeba. 324, Head, a, Dobso-ventbal view ; b, 

 froxt view. After Drasche, 1884. 325, a, Male tail; b, vulva; c, female tail. 

 Afteb Skrjabin*, 1916 



Morphology. — Sciadiocara (p. 260) : In the only available descrip- 

 tion of this parasite, that by Skrjabin (1916), there is only the state- 

 ment that the cephalic appendages adhere to the cuticular surface 

 and that the edges of these appendages are the typical cords corre- 

 sponding to the cordons of the cervical region of the acuarids. 



Life history. — Unknown; probably involves intermediate stages in 

 other hosts. 



Distribution. — Asia (Russian Turkestan). 



Genus SEURATIA Skrjabin, 1916d 



Synonym. — Rictularia Froelich, 1802, part; Acuaria Bremser, 

 1811, part; Spiroptera Rudolphi, 1819, part; Gnathostoma Owen, 

 1836, part ; Prionostemma Gendre, 1920&. 



Generic diagnosis. — Acuariinae (p. 211) : The cephalic region orna- 

 mented with short cordons in the form of epaulets, curved as a 

 handle on the lateral surfaces, situated on the swollen cuticle, and 

 with free edge markedly dentate. Posterior to epaulets are a pair 



