THE FILARIDAE 65 



quitoes; produces disturbances of the lymphatic system 

 and is related to elephantiasis; common in Asia, Oceania, 

 West Indies, Central and Tropical South America, Africa; 

 one endemic center in Charleston, South Carolina, U. S. A. 



2. Filaria ozzardi (Filaria demarquayi). Female only, 

 known; length 65 mm. to 80 mm.; width 0.21 mm. to 0.25 

 mm.; vulva 0.76 mm. from anterior tip; head has diameter 

 of 0.1 mm.; anus 0.25 mm. from posterior end; tail with a 

 pair of characteristic fleshy papillae at tip; adults live in 

 connective tissue; effect on host probably nil; distribution, 

 St. Vincent, Dominica, Trinidad, St. Lucia, British Guiana. 



3. Loa loa (Filaria loo). Cuticula with scattered, rounded 

 thickenings or bosses; male thin, white almost transparent, 

 with body tapering to each extremity; length 25 mm. to 

 34 mm.; width 0.27 mm. to 0.43 mm.; head like truncated 

 cone; tail somewhat incurved with rounded tip; anus 0.075 

 mm. to 0.082 mm. from tip of tail; three pairs of well marked 

 preanal papillae and two pairs of post-anal papillae present; 

 spicules unequal 0.113 mm. and 0.176 mm. long; female, 

 length 45 mm. to 63 mm.; width 0.5 mm.; vulva situated 

 about 2 mm. from the anterior end; adult in superficial 

 connective tissue the conjunctiva, the subcutaneous fat, the 

 superficial aponeuroses in all parts of the body; larvae 

 (Plate VI, Fig. 2) only found in peripheral blood during the 

 day; development of larvae takes place in salivary glands 

 of a mango-fly (Crysops dimidiatus) ; almost entirely limited 

 to Africa; especially West Coast. 



4- Acanthocheilonoma perstans (Filaria perstans). Body 

 cylindrical, uniform, except toward both ends where it 

 tapers a little. Male, rarely met with; length 45 mm. 

 width 0.6 mm. to 0.8 mm.; tail greatly curved ending in a 

 bifid prolongation of cuticula; spicules very unequal in size; 

 four pairs of pre-anal and two pairs of post-anal papillae 

 present. Female 70 mm. to 80 mm. in length; width 0.12 



