NEMATODE PARASITES OF BIRDS 



225 



Morphology. — Acuaria sensu stricto (p. 216) : Body slightly at- 

 tenuated anteriorly. Mouth with 2 lateral lips, each with 2 papillae 

 on external surface and between the papillae a triangular area for 

 the insertion of the muscles of the pharynx. Cordons (fig. 289 a 

 and b) straight, not recurrent or anastomosing or appreciably pro- 

 jecting from the cuticular surface, 380/* long and not extending 

 posterior to the esophagus. Cervical papillae very small, between 

 the cordons and slightly anterior to their middle. 



Male 4.89 mm. long by 120/* wide, according to Gendre, or 6.2 to 

 7 mm. long by 167/* wide, according to Dujardin. Buccal cavity or 

 pharynx 150/* long; anterior esophagus 430/* long; posterior esoph- 

 agus 1.58 mm. long. Caudal alae (fig. 289 c) wide and thick and 

 of 2 concentric parts, the inner wider and transversely striated, the 

 outer narrower and granular. Four pairs of preanal and 6 pairs of 



Fig. 2S 



-Acuaria sdbula. a and b, Head end ; c, male tail ; d, right and e, 



LEFT SPICULE. AFTEE GEN-ORE, 1913 



postanal papillae. Spicules (fig. 289 d and e) dissimilar, 190/* and 

 120/* long, respectively. 



Female 18 mm. long by 290/* wide. Head 51/* wide. Buccal cavity 

 or pharynx 170/* long. Tail straight, conical, 225/* long. Vulva 

 10 mm. from tail end and 8 mm. from head end. Eggs 37 to 39/* 

 long. 



Life history. — Unknown ; probably involves intermediate stages in 

 other hosts. 



Distribution. — Europe ( France ) . 



ACUARIA TENUIS (Dujardin. 1845) Railliet, Henry, and Sisoff. 1912 



Synonyms. — Dispharac/us tenuis Dujardin, 1845. 



Hosts. — Primary : Saxicola rubetra; secondary : Unknown. 



Location. — Between the tunics of gizzard. 



Morphology. — Acuaria sensu stricto (p. 216) : Head with 2 lateral 

 lips from which the cordons originate. Body very slender. 



Male 4.84 mm. long by 94/* wide. Head 20/* wide. Buccal cavity 

 or pharynx 140/* long; anterior esophagus 250/* long by 20/* Avide; 

 posterior esophagus 750//, long by 44/* wide. Spicules 133/* and 95/* 

 long, respectively. Cloacal aperture 135/* from end of tail; tail 

 curved. Caudal alae 240/* long, with slightly salient papillae. 



