NEMATODE PARASITES OF BIRDS 



181 



face of the body for a distance of QlOfx anterior to cloacal aperture. 

 Eleven pairs of caudal papillae, of which 4 are preanal, 7 postanal, 

 and in addition a large unpaired papilla on the left side of the ante- 

 rior edge of cloacal aperture. Spicules (fig. 251 e and /) unequal, the 



Fig. 251. — Habronbma monoptera. a, Anterior end; b, lateual up; c, mediax 

 lip; d, male tail; e, left spicule; f, right spicule; g, female tail. After 

 Gendre, 1922 



one 1.56 to 1.68 mm. long, the other 380 to 460/* long. Gorgeret diffi- 

 cult to see. 



Female 12.3 to 13.6 mm. long by 430 to 440^ wide. Lateral ala 

 about 2.98 mm. long. Tail (fig. 251 g) 180/* long. Vulva near middle 

 of body, sometimes a little anterior, sometimes a little posterior to 

 middle, not salient, difficult to find. Vestibule 810/x long. Eggs 38 

 to 42/x long by 17 to 19/x wide. 



