58 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Life history. — Probably similar to that of II. gallinae (p. 54). 

 Distribution. — Asia (India). 



HETERAKIS BRASILIANA Linstow. 1899 



Synonym. — Ascaridia brasiliana (Linstow, 1899) Travassos, 1913. 

 In a later study, Travassos (1918) reassigns this species to Heterakis. 



Hosts. — Perdix, species and Rhynchotus rufesoens. 



Location. — Intestine. 



Morphology. — Heterakis (p. 50) : Mouth with 3 lips; at the base 

 of the lips there occurs laterally a papilla. Lateral alae of cephalic 

 extremity large. Esophagus 1/11.5 of total length. Posterior ex- 

 tremity of both sexes with digitiform prolongation. 



Male 19.1 mm. to 20 mm. long by 520 to 590^ wide. Tail 1/57 

 of total length, according to Linstow; 450/* long, according to 



Fig. 73. — Heterakis bosia. a, Mali: tail and point of kigiit spicule; ?». left 



SPICULE FROM DORSUM : C, RIGHT SPICULE FROM SIDE. AFTER I.ANE, 1014 



Travassos. Preanal sucker 200/x in diameter, with a papilla on pos- 

 terior rim. The earlier descriptions (Linstow, 1899, and Travassos, 

 1913) describe and figure 10 pairs of caudal papillae but those 

 figures omitted all detail of the cloacal region, whereas according 

 to Travassos, 1918, there are 12 pairs of papillae, his figure (fig. 74) 

 showing a pair just anterior and another just posterior to the cloacal 

 aperture. The 12 pairs are arranged as follows: 2 preanal, 6 adanal, 

 4 postanal. There is in addition an unpaired papilla on the right 

 side slightly posterior to the sucker. Spicules short and wide, about 

 260/x long, according to early descriptions; 390/x, long, according to 

 Travassos, 1918. 



Female 34 mm. long by 790/t wide. Vulva in anterior part of 

 body. Tail 1/30 of total iength. Eggs 05/x long by 44^ wide (Tra- 

 vassos says 0.065 mm. long by 0.944 mm. wide but the latter figure 

 is evidently a typographical error for 0.044). 



