182 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



Life history. — Unknown; probably involving an insect as inter- 

 mediate host. 



Distribution. — Africa (French Guinea (Labe)). 



HABRONEMA SEURATI Skrjabin, 1917 



Host. — Primary: Fateo cenchris; secondary: Unknown. 



Location. — Gizzard. 



Morphology. — Habronema (p. 172) : Body small, attenuated at two 

 extremities; cuticle transversely striated (fig. 252a), the striations 

 crenate. Lateral alae very feebly developed, originating a little pos- 

 terior to the level of the cervical papillae, which are 144/*. from the 

 anterior end. Two lateral lips, each with a tooth on the inner sur- 

 face; a dorsal and a ventral lip, each with a small acuminate tooth. 

 In general, lips like those of H. mansioni (p. 179). 



Fig. 252. — Habronema seubati. a, Transverse striation of body ; b, cuticular 



STRUCTURE OF VENTRAL SURFACE OF MALE TAIL ; C, MALE TAIL ; d, LEFT SPICULE ; €, 

 RIGHT SPICULE. AFTEB SKRJABIN, 1917 



Male 5.5 mm. long by 300/*, wide. Caudal alae (fig. 252c) elongate, 

 longitudinally striated, the striations giving appearance of undula- 

 tions. Cuticle of ventral surface of caudal region anterior to cloacal 

 aperture has longitudinal folds 11 to 13/*. wide, the free border of 

 each fold with teethlike projections (fig. 2525). Posterior to the 

 cloacal aperture the ventral surface of body is smooth except for 

 three transverse rows of small projections posterior to the first pair 

 of postanal pedunculated papillae. Spicules (fig. 252d and e) un- 

 equal, 2.1 mm. and 450//, long. The pedunculated papillae number 

 4 pairs of preanal and 2 pairs of postanal ; the sessile papillae, 9 to 

 10 toward the end of the tail and 1 large papilla on the anterior edge 

 of cloacal aperture. Cloacal aperture 200/* from posterior end. 



Female 9.2 mm. long by 370//, wide. Vulva 3.4 mm. from pos- 

 terior end, thus in the posterior part of body. Eggs 47//. by 27.5/x 

 wide. 



