NEMATODE PARASITES OF BIRDS 



353 



MICROTETRAMERES CONTORTA (Weidman, 1913) Travassos, 1915b 



Synonyms. — Tropidocerca contorta Weidman, 1913 ; Tetrameres 

 contorta (Weidman, 1913) Travassos, 1914. 



Hosts. — Primary: Dichocereus oicornis; secondary: Unknown; 

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



Location. — Proventriculus. 



Morphology. — Mierotetrameres (p. 351' 



7 :;v2 r . ; 



FIG. 415. MICROTETRAMERES CRDZI. C, FEMALE ; b, MALE. AFTER TRAVASSOS, 1914 



Male 6 mm. long by 125/* wide. Body subcylindrical, filiform 

 (fig. 416 a and b) ; cuticle transversely striated. Anterior extremity 

 tapers rather abruptly to a rounded end. Posterior extremity 

 tapers more gracefully; tail strongly curved toward cloaca; sharply 

 pointed. Cloaca 300^ from posterior extremity, surrounded by 

 prominent cuticular ring. Spicules unequal; shorter one 150/* long, 

 the longer one 5.4 mm. long. Four pairs of caudal papillae, two 

 pairs being preanal and two pairs postanal. 



Female 2.1 mm. long by 1.9 mm. Body blood red, tightly coiled 

 in complex manner (fig. 416 d, e, and j) ; no longitudinal furrows as 



