308 



BULLETIN 140, UNITED STATES NATIONAL MUSEUM 



longitudinal rows. Six pairs of pedunculated papillae of which 4 

 are preanal, 2 postanal, the latter in a transverse row just posterior 

 to the cloacal aperture. Spicules equal, 1.4 mm. long, their ends 

 rounded. 



Female 42 mm. long by 950/x wide. Tail slender, cone-shaped, 

 pointed at end. Vulva just posterior to middle of body, dividing the 

 body length in a ratio of 23 : 21. Eggs 39/a long by 26/a wide, thick- 

 shelled. 



Life history. — Unknown; probably involves intermediate stages in 

 insects. 



Distribution. — South West Africa. 



Ortlepp notes that this species shows certain differences from 

 Physaloptera, notably the shape of the lips, the arrangement of 

 caudal papillae, and the position of the vulva, and he lists it under 

 Species Inquirendae. 



Figs. 371-373. — 371, Physaloptera, species. Headend. After Parona, 1885. 372, 

 1909. 370, Physaloptera malleus, a, Head; b, male tail. After Linstow, 

 1883 



PHYSALOPTERA MALLEUS Linstow, 1883 



Host. — Primary : Corvus comix; secondary : Unknown. 



Location. — Not given. 



Morphology. — Physaloptera (p. 295) : Head (fig. 370#) with 2 very 

 large rounded lips, hollowed out on the inner surface. Esophagus 

 1/6.5 of total length. 



Male 20 mm. long by 760/a wide. Tail 1/33.3 of total body length. 

 Caudal region (fig. 3705) oval; 4 pairs of preanal, 2 pairs of post- 

 anal, pedunculated papillae ; an unpaired median papilla on anterior 

 margin of cloacal aperture. Caudal alae covered with round tu- 

 bercles arranged in transverse rows. Spicules unequal, the larger 

 having a double barb. 



Female 42 mm. long by 1.5 mm. wide. Tail short, only 1/269 of the 

 total body length. Eggs 46/x long by 29/u, wide, double-shelled, the 

 outer shell being the thicker. 



Life history. — Unknown ; probably involves intermediate stages in 

 insects. 



Distribution. — Asia ( Turkestan ) . 



