214 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



ACUARIA MUSCICAPAE (Linstow, 1878) Railliet, Henry, and Sisoff, 1912 



Synonyms. — FUaria muscicapae Linstow, 1878; Disphwragus 

 muscicapae (Linstow, 1878) Stossich, 1891. 



Hosts. — Primary : Museicapa atricapilla; secondary : Unknown. 



Location. — Stomach (gizzard). 



Morphology. — Acuaria sensu lato (p. 212) : Head with 2 conical 

 lips, of which, according to Gendre, one is smaller than the other. 

 (Linstow, also quoted without comment by Gendre writes that the 

 ventral lip is the smaller, but as the lips in spirurids are lateral, 

 there appears to be some error in this statement.) The cordons ex- 

 tend 330/* posteriorly from the head, in the female, and hence not 

 beyond the limits of the esophagus. 



Male unknown. 



Female 11.5 mm. long by 150/i wide. Mouth followed by a 

 vestibule 160//, long, and this by an esophagus of which the glandular 

 portion is 750/x long and the muscular portion 330/x long. The tail 

 is 130/x long, conical, with a rounded end. Vulva somewhat pos- 

 terior to middle of body, dividing body in ratio of 7:6. Eggs 29/u, 

 long by 16//, wide. 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — Europe (Prussia (Hanover)). 



This species belongs in Acuaria sensu stricto or Cheilospirura, ap- 

 parently, but can not be definitely placed until the male characters 

 are known. 



ACUARIA PTILOPACHYDIS Gendre. 1920a 



Hosts. — Primary : Ptilopachys fuscus; secondary : Unknown. 



L ocation. — Gi zz ar d . 



Morphology. — Acuaria sensu lato (p. 212) : Body colorless, filiform 

 and slender. Cuticle transversely striated. Mouth with 2 large 

 lateral lips, each bearing on its external surface, near the base, 2 

 symmetrical papillae, and internally a small median triangular 

 lobe. Four cordons (fig. 278«), hidden in cuticle, not recurrent or 

 anastomosing, extend in submedian lines to a length of 2.62 to 3.13 

 mm., hence beyond the posterior end of esophagus (the esophagus 

 and ventricle as termed by Gendre). Lateral papillae slightly pos- 

 terior to anterior end of esophagus. 



Male unknown. 



Female 8.84 to 12.73 mm. long by 170 to 200> wide. Pharynx 110 

 to 200^ long. Esophagus 400 to 550/a long; ventricle (evidently 

 second part of esophagus) 1.07 to 1.43 mm. long. Tail (fig. 2786) 

 200 to 245/* long, conical, digitiform, rounded at apex. Vulva slightly 

 salient, bordered with a cuticular margin and slightly posterior to 



