NO. 2131. 



NEAIATODE PARASITES OF RODENTS— HALL. 



183 



Fig. 211.— FiLAraA cir- 

 c u L A R I s . Head, 



LATERAL VIEW. EN- 



L A R G E D . After 



VON LiN.STOAV, 1899. 



nym is therefore without standing. It has not been rephiced by a 

 new name in this paper for the reason that it may be F. martis. 



F. inartls or F. suhcutanca is perhaps the adult of the microfihiria 

 recorded by Plimmer (1915)'. 



FILARIA PISTILLARIS Molin, 1858&. 



Synonym. — F'darla sciuri in Collect. Brazil. \1. 

 C. V. of Molin, 18585. 



Specific diagnosis. — Filaria (p. 179) : Body fili- 

 form, slightly diminishing in size posteriorly and 

 with the anterior extremity obtuse and claviform. 

 The mouth is unarmed. 

 Male unknown. 



Female 137.5 mm. long and 250 ix thick. The posterior extremity 

 is straight, the apex bearing four papillae, of which the two poste- 

 rior, or external, are the larger. In front of the vulva is a thick node 

 distinct from the rest of the bod}^ 

 Host. — Sciurus igni ventres. 

 Location. — Subcutaneous on abdomen. 

 Locality. — Marabitanas, Brazil. 



The name Fila7'la sciuri is a 

 synonym of F. pistillat'is, and 

 hence antedates and invalidates 

 Filaria sciuri von Linstow, 

 1903. See Filaria linstoivi. 



FILARIA CIRCULARIS von Linstow, 

 1899. 



Speclfc diagnosis. — Filaria 

 (p. 179) : Head rounded. Small 

 buccal cavity with strong walls 

 (fig. 241). 



Male 20 mm. long and 120 /x 

 thick. The esophagus is one 

 forty-sixth and the tail one one- 

 hundred-and-twenty-fif th of the 

 total body length. The posterior extremity is coiled around three 

 times. The spicules are 260 and 190 /x long and have projections at 

 the distal extremity (fig. 242). Seven pairs of postanal papillae 

 present. 



Female 65 mm. long and 250 ^i thick. The esophagus is one one- 

 hundred-and-fifth and the pointed tail one ninety-third of the total 

 body length. The vulva is far anterior and divides the body in the 

 proportion of 1 :49. Eggs 21 by 13 /x in diameter. 

 Host. — '"'•Llesperomys " species. 



Fig. 242.— Filaria circularis. Posterior ex- 

 tremity OF male, lateral view. Enlarged. 

 After von Linstow, 1S99. 



