NEMATODE PARASITES OF BIRDS 



283 



Hosts. — Primary: Falco tridentatus ; secondary: Unknown. 



Location. — Xot given; presumably in digestive tract. 



Morphology. — Synhimantus (p. 272) : Mouth with 2 very small 

 papilliform lips. Body transversely striated, the dense striations of 

 the anterior body forming pseudoannulations, and bent in a sigmoid 

 curvature. Anterior extremity noticeably attenuated. Cordons 

 long, flexuous, recurrent, and anastomosing in pairs. 



Male 5 mm. long by 300/t wide. Caudal extremity coiled in 2 spiral 

 turns, its apex obtuse. Alae long and projecting. One spicule short 

 and recurved; the other long, arcuate and filiform. 



Female unknown. 



6. 



Fig. 348. — Synhimantus subrecta. a, Male tail ; b, right spicule; c, profile 



VIEW AND d, VENTRAL VIEW OF LEFT SPICULE; f, FEMALE TAIL. AFTER (JENDRB. 

 1921 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — South America (Brazil). 



SYNHIMANTUS RAILLIETI (Skrjabin, 1924) Cram, 1927 



Synonym.. — Acuaria raillieti Skrjabin, 1924. 



Hosts. — Primary: Pelecanus, species; secondary: Unknown. 



Location. — Gular pouch. 



Morphology. — Synhimantus (p. 272) : Body slender, cylindrical, 

 tapering toward both ends. Cuticle delicately striated transversely. 

 Mouth with 2 lips. Cordons, originating at the base of the lips, ex- 

 tending posteriorly in 7 symmetrically placed, serpentine coils, re- 

 current and anastomosing in pairs on lateral surface of body. Width 

 of cordons varying at different parts, the portion descending from 

 the lips gradually increasing in width, reaching a maximum in the 



