NEMATODE PARASITES OF BIRDS 335 



8. Female with pharynx 400m, esophagus 2 mm. Long; anus 250/i from posterior 



end; cloacal aperture of male 70m from posterior end. 



Tetrameres confusa, p. 341. 



Both pharynx and esophagus of female shorter than above, if described ; 



anus, if described, not more than 175m from posterior end ; eloacal aperture 



of male, if descrihed, 100m or farther from posterior end 9. 



9. Only female known 10. 



Both male and female known 11. 



10. Female 2.2 mm. long by 2.5 mm. wide; pharynx 350m, esophagus 1.4 mm. 



long; eggs 28 to 30m long by 15 to 18m wide Tetrameres coccinea, p. 339. 



Female 3 to 4 mm. long hy 1.5 to 2 mm. wide; pharynx 190^, esophagus 990m 

 long; eggs 42 to 49/* long by 21ti wide Tetrameres cochleariae, p. 340. 



11. Male 2.2 to 2.G mm. long; female not over 1.7 mm. long L2. 



Male larger than above or (T. dubia) smaller than above; female 2 mm. 



or more in length 13. 



12. Eggs 54m by 28m wide, with long filaments at each pole ; one spicule 480m in 



length, the other rudimentary Tetrameres nouveli, p. 34S. 



Eggs 75 to 78m long by 21m wide, with no filaments described ; spicules 200m 

 and 22m long respectively Tetrameres tetrica, p. 350. 



13. Female not over 2.5 mm. long; male 1.6 mm. long, its esophagus being 300m 



long; long spicule 720m in length Tetrameres dubia, p. 342. 



Female 2.5 to 6 mm. long; male 3 to 6 mm. long, its esophagus 780m or more 

 in length ; long spicule not over 490m iu length 14. 



14. Ovejector with diverticulum or copulatory receptaculum 400m long ; eggs 



not over 56m long; short spicule at least 82m long. 



Tetrameres fissispina, p. 343. 

 Ovejector simple, without diverticulum; eggs 59 to 03m long; short spicule 



56m long Tetrameres micropenis, p. 348. 



This key does not include Tetrameres zakharoivi Petrow, 1926. See Addenda, 

 p. 385. 



TETRAMERES PARADOXA (Diesing, 1835) Travassos. 1914d 



/Synonyms. — Tropisurus paradoxus Diesing, 1835; Tropidocerca 

 paradoxa (Diesing, 1835) Diesing, 1851. 



Diesing's description of 1851 is evidently a composite description 

 as in 1801 he makes Tropidocerca paradoxa Diesing, 1851 in part a 

 synonym of his new species Tropvlocerca inflata, and also transfers 

 the synonomy given originally under Tropisurus paradoxus (that is, 

 Spiroptera inflata and Tetrameres haemochrous) to Tropidocerca 

 i7ifl,ata. The original material up to the present time is poorly de- 

 scribed; it would be advisable therefore that the species be established 

 on Brazilien material from the type host, Catharte.s urubu. The de- 

 scriptions of Diesing (1835) and of Drasche (1884) of the same 

 material are summarized below. 



Hosts. — Primary: Cathartes urubu and Strix torquata. Reported 

 from a large number of other hosts but probably erroneously so, as it 

 is known that Microtetrameres inflata {Eustrongylides mergorum) 

 was the species involved in many of the reports and other species 

 may also have been mistaken for this one, owing to (lie original 



3612—27—23 



