NEMATODE PARASITES OF BIRDS 359 



Male 1.4 mm. long (fig. 421). Cuticle cross-striated. Buccal cap- 

 sule very small. Spicules of very unequal lengths, 990/x and 100/i 

 long, respectively. 



Female 780/* long by 640/x wide. Body red, strongly striated trans- 

 versely ; long axis coiled (this is assumed to be true as Travassos in- 

 cluded this species in Microtetrameres). Buccal capsule 12/i long; 

 pharynx 73/i long by 10/i wide; esophagus 490/a long by 50//, wide. 

 Intestine saclike, becomes thinner posteriorly. Anus 68/1 from pos- 

 terior extremity. Vulva slightly anterior to anus. Eggs 45/t long by 

 24/i wide, many of them embryonated. 



Life history. — Probably similar in a general way to that of T . 

 fissispina (p. 343). 



Distribution. — South America (Brazil). 



MICROTETRAMERES PUSILLA Travassos, 19156 



Synonym. — Tetrameres pusilla Travassos, 19155. 



Hosts. — Primary: Turdus rufiventris and Platycichla flavipes; 

 secondary : Unknown ; probably similar in a general way to that of 

 T. fissispina (p. 343). 



Location. — Proventriculus. 



Morphology. — Microtetrameres (p. 351). 



Male 3.5 to 4 mm. long by 100 to 120/t wide. Body (fig. 422) fili- 

 form, white, cuticle transversely striated and without spines. Buccal 

 capsule cylindrical, 17/a deep by 7/* wide. Pharynx 300//, long. Eso- 

 phagus yellow-colored, slightly claviform. Travassos says it is 42/* 

 long but he evidently means width ; judging its length as compared 

 with that of the pharynx, in his figure, the esophagus measures about 

 600//. long. Two slender spicules of very different lengths, the smaller 

 about 85/* long by 5/i wide, the larger approximately 1.32 mm. long 

 by 7/i wide, having the basal part dilated while the distal end has a 

 rounded point. Cloaca 1 aperture 170/* from posterior extremity. 

 Five pairs of caudal papillae, asymmetrical, of which 2 are preanal, 

 1 adanal, and 2 postanal. 



Female 2 mm. long by 1.5 mm. wide. Body of red color and with 

 its long axis spirally coiled (assumed to be true as Travassos places 

 this species in Microtetrameres). Culticle with marked transverse 

 striations and with 4 furrows corresponding to the median and lat- 

 eral lines. Buccal capsule barrel-shaped, 9/i long and 10/i in maxi- 

 mum width. Pharynx 273/t long. Esophagus cylindrical, 974/x long 

 (in his description in 1919 Travassos says 530/* long by 90/t wide). 

 Anus 140/x from posterior extremity. Eggs ellipsoidal, 42 to 49/* 

 long by 28/i wide. 



Life history. — Probably similar in a general way to that of T. 

 fissispina (p. 343). 



Distribution.— South America (Brazil). 



