180 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 50. 



ANALYTICAL KEY TO SPECIES OF FILAKIA. 



1. No description Filaria leporis (p. 187), Filaria species, p. 188. 



Described species 2. 



2. Buccal cavity witli strong cliitinous walls. Location of parasite not given. 



Filaria circularis, p. 183. 



Buccal cavity witliout strong cliitinous walls. Subcutaneous, or in pleural 



or peritoneal cavities 3. 



3. Known only in larval form in subcutaneous tissue Filaria muricola, p. 186. 



Adult forms 4. 



4. Posterior end of body terminates in 2 divergent spines. Found in pleural 



and peritoneal cavities Filaria diacantha, p. 184. 



Posterior end of body does not terminate in 2 divergent spines. Subcu- 

 taneous 5. 



5. Intestine pigmented black. Females over 150 mm. long and males with 12 



or 13 pairs of caudal papillae Filaria subcutanea, p. 182. 



Intestine not pigmented black. Females less than 150 mm. long, or if more 

 with males of the same species having 6 pairs of cau(hil papillae 6. 



6. Female over 150 mm. long and male with 6 pairs of caudal papillae. 



Filaria mart is, p. 180. 

 Female less than 150 mm. long 7. 



7. Female more than 125 mm. long, with thick node in front of vulva. 



Filaria j)istiUaris, p. 183. 

 Female less than 50 mm. long and Avithout node in front of vulva 8. 



8. Head with 2 rows of 4 flat papillae in each. Conical tail end with a rounded 



tip prolonged into a small clavs^like process Filaria linstotoi,]). 184. 



Head papillae obscure or absent. Tail simple and without clawlike process. 



Filaria scapiceps, p. 185. 



FILARIA MARTIS Gmelin, 1790. 



Synonyms. — ? Filaria mcdinensis Rosa, 1794; Filaraia 



mustelarunh Kiidolphi, 1800 ; Filaria mustelarum Eudol- 



phi, 1809; Filaria rrmstelarum svJjcutanea Rudolplii, 1819; 



Filaria mustelae foinae Creplin, 1846 ; Filaria quadrhinna 



Diesing, 1851 ; Filaria ferforans ]\Iolin, 1858& ; ? Filaria 



mustelae harhorae M. C. V. Collect. Brasil. 



in Molin, 18585 ; ? Filaria mustela harhata 



Molin 1858& ; Filaria suh cutanea'^, in Parona, 



1894. 



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

 very long, slender, and white. Anterior ex- 

 tremity attenuated and obtuse (fig. 236). 

 Posterior extremity very much attenuated. 

 Cuticle not transversely striated. Mouth 

 small, round, unarmed, and surrounded by 

 six submedian noduliform circumoral pa- 

 pillae (fig. 237). In the female the ventro-submedian papillae are 

 more anterior than the dorsal papillae ; in the male the papillae are 

 somewhat displaced. 



236. 237. 



Figs. 236, 237.— Filaria martis. 



236, ANTF.rjoR extremity, 

 lateral view. enlarged. 

 After Ales.sandrini, 18-38. 



237, Uead, vieaved from the 

 FRONT. Enlarged. After 

 Schneider, 1866. 



