364 FILARIA LABIATO-PAPILLOSA [CH. 



Bruce, Hamerton, Batemanand Mackie (1910). Proc. Roy. Soc. B, 558, 



p. 468. 



Greig and Gray (1905). Rep. S. S. Comm. Roy. Soc. No. 6. 

 Leese, A. S. (1912). Journ. Trop. Vet. Sci. vol. n. p. 19. 

 Manders, N. (1905). Journ. R.A.M.C. vol. v. p. 623. 

 Martin, Leboeuf and Roubaud (1908). Bull. Soc. Path. Exot. vol. i. 



P- 356. 

 Minchin, Gray and Tulloch (1907). Reports S. S. Comm. Roy. Soc. No. 



8, p. 124. 



2. Filaria labiato-papillosa Alessandrini, 1838. 



Synonyms. Filaria cervina Dujardin, 1845. F. terebra 

 Diesing. Stomoxeos von Linstow, 1875. 



Habitat. The adult worm inhabits the peritoneal cavity 

 and occasionally the eyes of cattle and various species of deer. 

 The embryos are constantly present in small numbers in the 

 peripheral circulation. 



Description. The adult filaria is white and filiform with 

 the integument shewing fine transverse striations. The body 

 tapers towards both extremities, the anterior being blunter 

 than the posterior. The mouth is surrounded by a chitinous 

 ring and immediately behind it are four small depressions, 

 from each of which arises a tactile papilla. The male measures 

 4 to 6 cms. in length. Its tail is especially twisted and 

 on each side are three pre-anal, one ad-anal and five 

 post-anal papillae, behind which is situated a well-developed 

 conical process. The female measures 6 to 12 cms. in length 

 Its tail is also twisted but not so much as in the male. The 

 caudal extremity bears a large number of fine processes, in 

 front of which are situated two strong conical processes. 



Life history. This filaria is viviparous and the embryos 

 when born measure 140 to 250 microns in length. Noe has 

 investigated the further evolution of these embryos and finds 

 that it takes place in the body of Stomoxys calcitrans. When 

 this fly ingests blood containing the embryonic filariae, the 

 latter bore through the gut wall and make their way into the 

 thoracic muscles. Here they accomplish their larval develop- 

 ment and when it is complete, the young filariae travel into the 



