226 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Female 18 mm. long by 160/* wide. Tail 230/x long. Eggs 34/*. 

 long. 



Life history. — Unknown ; probably involves intermediate stages in 

 other hosts. 



Distribution. — Europe (France (Rennes)). 



Genus CHEILOSPIRURA Diesing, 1861 



Synonyms. — Acuaria Bremser, 1811, part; Dispharagus Dujardin, 

 1845, part. 



Generic diagnosis. — Acuariinae (p. 211) : Body elongate, tapering 

 toward extremities. Head with 2 lips. Cordons directed posteri- 

 orly, not recurrent or anastomosing. Male with tail rolled in spiral, 

 alate or not alate; spicules very unequal and dissimilar; 5 to 7 pairs 

 of postanal papillae. 



Parasitic between the tunics of the gizzard of birds. 



Type-species. — Cheilosph^ura hamulosa (Diesing, 1851) Diesing, 

 1861. 



KEY TO SPECIES OF CHEILOSPIBURA 



1. Male 7.9 mm. long, female S.5 mm. long. Vulva in posterior part of body. 



dividing body length in ratio of 34: 7 Cheilospirura rotundata, p. 229. 



Male 10 mm. long or longer ; female 16 mm. long or longer. Vulva near 

 middle of body 2. 



2. Cordons extend almost to posterior end of body ; 5 pairs of postanal papillae. 



Cheilospirura hamulosa, p. 226. 

 Cordons on anterior region of body ; 6 pairs of postanal papillae 3. 



3. Cordons spiny, not extending beyond anterior third of the first part of the 



esophagus ; spicules 192^ and 700 to 720/tt long ; eggs 39 to 43/* by 25 to 27/*. 



Cheilospirura spinosa, p. 229. 



Cordons not spiny, extending to posterior region of first part of esophagus ; 



spicules 170fi and 560/* long ; eggs 33/j. by 22/*__ Cheilospirura gruveli, p. 227. 



Cheilospirura pavonis, recently described by Ortlepp (see Ad- 

 denda, p. 389), can be differentiated from the species keyed above by 

 its size, the male being only 6.5 mm. long, the female 14.7 mm. long, 

 and by the length of the cordons, which extend into the second 

 half of the body length but do not approach the posterior end. 



An additional species recently described by Ozerska, Cheilo- 

 spirura skrjabini (see Addenda, p. 389), can be differentiated from 

 the above species by its short spicules, the one 205 to 239/t long, the 

 other 125 to 148/x long. 



CHEILOSPIRURA HAMULOSA (Diesing, 1851) Diesing, 1861 



Synonyms. — Spiroptera hamulosa (Diesing, 1851) ; Dispharagus 

 hamulosus (Diesing, 1851) Stossich, 1890; Spiroptera perforans Cen- 

 toscudi, 1911; Acuaria hamulosa (Diesing, 1851) Railliet, 1911. 



Hosts. — Primary: Gallus gallus, Meleagris gallopavo, Phasianus 

 gall us; secondary: Unknown, probably arthropods, perhaps insects. 

 The turkey is reported as a host by Ransom and Hall. 



