NEMATODE PARASITES OF BIRDS 



303 



Life history. — Unknown; probably involves intermediate stages 

 in insects. 



Distribution. — Africa (Algeria (Mascara and Bordj-Menaiel) ). 



PHYSALOPTERA FUSIFORMIS Linstow, 1902 



Host. — Primary: Micro pogan, species; secondary: Unknown. 



Location. — Head. 



Morphology. — Physaloptera (p. 295) : Cuticle thick, enlarged pos- 

 terior to the lips; narrow cross-striations. Head with 2 large, 

 lateral, hemispherical lips, each with 3 small papillae on the outer 

 edge. 



Male 18 mm. long by 1.4 mm. wide. Esophagus about 1/4, tail 

 about 1/23 of total body length. Caudal region (fig. 364) short, heart- 

 shaped ; laterally 4 pairs of pedunculated papillae; one pair of sessile 



Figs. 300-304. — 363, Physaloptera crosi. a, Head end ; b, male tail ; c, female 

 tail. After Seurat, 1914. 364, Physalopteba fusiformis. Male tail. After 

 Linstow, 1902 



papillae directly anterior and another pair directly posterior to cloa- 

 cal aperture; near the tail end 3 pairs of sessile ventral papillae and 

 an unpaired median papilla anterior to them. Linstow's figure 

 shows longitudinal rows of tubercles in the lateral fields of the tail. 



Female 30 mm. long bv 1.97 mm. wide, attenuated at both extremi- 

 ties. Esophagus about 1/5, tail 1/20 of the total body length. Vulva 

 in anterior part of body, dividing body length in ratio of 13:56. 

 Eggs 81/4 long by 26ju, wide, with very thick shells. 



Life history. — Unknown; probably involves intermediate stages in 

 insects. 



Distribution. — Europe (Germany, Breslau Museum). 



PHYSALOPTERA GALINIERI Scurat, 191U 



Synonym. — P. alata Rudolphi of Ortlepp, 1922 may be a synonym 

 of this (see p. 291)). 

 £$612— 27— 21 



