NEMATODE PARASITES OF BIEDS 351 



wide and the shorter which is only slightly chitinized, 22/i long by 

 4/i wide. 



Female 1.5 mm. long by 1 mm. wide. Body red, globular, with 4 

 deep longitudinal furrows corresponding to the median and lateral 

 lines. Buccal capsule oval, 16^. deep by 12ft wide. Tail slender and 

 very long. Ovaries 21/u, wide. Uterus ending posteriorly in a large 

 rounded seminal vesicle, about 10/x in diameter. Ovejector similar to 

 that of T. micropenis. Eggs 75 to 78/*, long by 21yu. wide ; ellipsoidal. 



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

 fissispina (p. 343). 



Distinbution. — South America (Brazil). 



TETRAMERES UNISPINA (Diesing. 1861) Travassos, 1914d 



Synonym. — Tropidocerca unispina Diesing, 1861. 



Host. — Primary : Corvus comix; secondary : Unknown ; probably 

 similar in a general way to that of T. fissispina (p. 343). 



Location. — Proventriculus. 



Morphology. — Tetrameres (p. 334). 



Male unknown. 



Female 3 mm. in longitudinal and transverse diameters. Body 

 globular. Mouth surrounded by 3 swollen protuberances which are 

 beset internally and externally with 2 points. The tail end is armed 

 with a spine. 



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

 fissispina (p. 343). 



Distribution. — Not given for original material; reported from 

 United States by Stiles and Hassall. 



Genus MICROTETRAMERES Travassos, 1915b 



Generic diagnosis. — Tetrameridae (p. 333) : Long axis of female 

 body coiled in a simple or a complicated spiral. Body usually with- 

 out the 4 longitudinal furrows that are present in Tetrameres; if 

 present, these furrows also spirally coiled. 



Type-species. — Microtetrameres crusi (Travassos, 1914) Travas- 

 sos, 1915. 



As noted in the discussion under key to genera of Tetrameridae 

 (p. 333) I have changed the diagnosis as given by Travassos for 

 Micro tetrameres. 



Kl-Y TO SPECIES OF MICKOTETUAMKIIES 



1. Species wrongly placed in this genus, apparently identical with Eustrongy- 



tides mergorum Microtetrameres inflata, p. 357. 



2. Anns of female 450ft from posterior end; male <> mm. long; longer spicule 



5.4 mm. in length Microtetrameres contorta, p. 353. 



Anus of female not over 22~>n from posterior end; male not over 5 mm. 

 long; longer spicule not over '.'>.V> mm. in length 3. 



