NEMATODE PARASITES OF BIRDS 



221 



species is established on the material front Lanius i^ufus and L, 

 curuTKo. 



Location. — In stomach wall (proventriculus?). 



Morphology. — Acuaria sensu stricto (p. 216) : Head (fig. 284a) 

 with 2 lips, cordons joined for a distance of 20/* in the head region, 

 separating and passing posteriorly, gradually disappearing without 

 anastomosing. 



Male 10 to 11 mm. long by 200 to 220/* wide. Cordons 280 to 

 320 long. Tail (fig. 2846 and c) recurved, enlarged and cordate, 

 terminating in a sort of rounded lamina 170/* wide, in front of which 

 are the 2 lateral alae thickened and heavily striated, the width here 

 being 350 to 400/*. Twelve pairs of caudal papillae, of which 8 pairs 

 are postanal. Cloacal aperture 300 to 400/* from tail end. Accord- 

 ing to Drasche, one spicule is short and thick, 270/* long by 50/* wide, 



Fig. 284. — Acuaria cokdata. a, Head end ; b, lateral and c, ventral view 

 of male tail. Afteb Mueller, 1897 



the other more curved, 210/* long, and slenderer; according to 

 Mueller, the right spicule is 150 to 170/* long and the left 170 to 

 183/* long by 17/* wide. 



Female 22.5 to 40 mm. long by 200 to 320/* wide. Cordons 480 to 

 600/* long. Anus 270 to 400/* from tail end. Vulva slightly anterior 

 to middle of body (10.6 mm. from head in worm 22.3 mm. long), 

 according to Dujardin ; Mueller found it exactly in the middle, 20.5 

 mm. from head and tail ends. Eggs 43 to 48/* by 27 to 30/*, thick- 

 shelled. 



Life history. — Unknown; probably involves intermediate stages 

 in other hosts. 



Distribution. — Europe (Portoferrajo), Asia (Russian Turkestan), 

 Africa (Algeria), and North America (District of Columbia; re- 

 port by Hassall). 



ACUARIA DEPRESSA (Schneider, 1866) Railliet, Henry, and Sisoff, 1912 



Synonyms. — Filaria depressa Schneider, 1860; Dispharagus de- 

 pressus (Schneider, 1866) Gendre, 1912. 



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



