192 BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



HARTERTIA OBESA Seurat, 1915b 



Hosts. — Primary: Caccdbis petrosa spatzi, Oedicnemus capensis, 

 Otis afroides, O. ruftcresta, and Plocepasser mahali; secondary: 

 Unknown, probably insects. 



Location. — Intestine. 



Morphology. — Hartertia (p. 191) : Head very small, distinct. 

 Cuticle finely striated. Lateral fields very large (155/*), opaque. 

 Polymyarian. No lateral alae. Lips (fig. 262) divided into 3 equal 

 lobes with very thick edges. Two papillae on each lip. 



Male 23.5 mm. long by 1.07 mm. wide. Precervical papillae 145/* 

 from cephalic extremity. Buccal cavity 160/* long ; esophagus 1/6 of 

 body length. Tail (fig. 263&) straight. Ventral surface of tail in 

 region of cloacal aperture covered with longitudinal rows of cuti- 



Fig. 262. — Hartertia oeesa. a, Dorsal ; b, lateral ; c, front view of head ; 

 d, egg. After Sedrat, 1915 



cular shields. Cloacal aperture 750/* from posterior end. Caudal 

 alae 1.3 mm. long; 6 pairs of long pedunculated papillae and in 

 addition 4 pairs of small sessile papillae near caudal extremity. 

 Upper lip of cloacal aperture somewhat projecting, triangular. 

 Spicules unequal, 2.1 mm. and 500/* long, respectively. Gorgeret 

 present, 200/* long. 



Female 40.8 mm. long, by 1.6 mm. wide. Buccal cavity 180/* long ; 

 total length of esophagus 1/10 of body length. Tail 1.5 mm. long, 

 rounded at end. Vulva (fig. 263a) not salient, seen with difficulty, 

 situated at anterior third of body. Ovejector composed of pyriform 

 vestibule 700/* long, directed anteriorly, a very long sphincter (1.5 

 mm.) originating at middle of vestibule, and recurved, unpaired 

 trompe 1.5 mm. long. Uteri divergent. Embryonated eggs (fig. 

 262c?) peculiar, the thick shell measuring 56 by 35/*, is doubled by a 

 vitelline membrane, showing in the meridian plane as a thin ring 

 10/* wide. 



