NEMATODE PARASITES OF BIRDS 305 



teeth, to each side of these a smaller tooth; internally additional, 

 still smaller teeth. Four large submedian papillae. Esophagus 

 about 1/6 of total body length. 



Male 11.4 mm. long by 470/* wide. Tail 1/19 of total body length. 

 Four pairs of long pedunculated papillae (fig. 366), 2 of them 

 preanal. 2 postanal. Just anterior of the cloacal aperture are 3, 

 just posterior to it 2, papillae; about midway from cloacal aperture 

 to tip of tail there are 4 papillae in a transverse row; posterior to 

 these are 2, making a total of 11 ventral papillae. Circumcloacal 

 region of bursa covered with longitudinal rows of pointed protuber- 

 ances. 



Female 19 mm. long by 53/t wide. Tail 1/35 of total body length, 

 conical, rounded at end. Eggs 52/u. long by 32/* wide; thick-shelled. 



Life history. — Unknown ; probably involves intermediate stages in 

 insects. 



Distribution. — Africa (Egypt) . 



PHYSALOPTERA INFLATA (Molin, 1860) Stossich, 1889 



Synonym. — Spiroptera inflata Molin, 18606. 



Host. — Primary : Falco unicinctus; secondary : Unknown. 



Location. — Esophagus and proventriculus. 



Morphology. — Physaloptera (p. 295) : Head continuous with body, 

 with inflated cuticle. According to Drasche, this species does not 

 have the 3 small teeth usually found internal to the outer tooth of 

 the lips, and this character differentiates it from P. acuticauda, 

 found in the same host. Body densely striated transversely, at- 

 tenuated posteriorly, truncated anteriorly. 



Male unknown. 



Female 7 mm. long by 300/* wide. Tail short, conical, with 

 rounded end. Anus not far from tail end. Vulva in anterior part 

 of body. 



Life history. — Unknown; probably involves intermediate stages in 

 insects. 



Distribution. — South America (Brazil). 



PHYSALOPTERA SUBALATA Schneider, 1866 



Synonym. — L ) hysaloptera alata Iiudolphi, 1819 in part. 



Hosts. — Primary : Falco, species and buzzard ; secondary : Un- 

 known. 



Morphology. — Physaloptera (p. 295) : Body large and robust. 

 Mouth with 2 lips (fig. 367a). According to Seurat each lip with 

 a small outer tooth, difficult to see, and a large tripartite inner tooth; 

 Schneider, however, states that the outer tooth is larger than the 

 inner. 



