NEMATODE PARASITES OF BIRDS 



183 



Life history. — Unknown; probably involving an insect as inter- 

 mediate host. 



Distribution. — Asia (Siberia.) 



HABRONEMA SPINOSA Gendre. 1922 



Host. — Primary : Falco tinmuncuhis ; secondary : Unknown. 

 Location.- — Proventriculus. 



Morphology. — Habronema (p. 172) : Body white, cuticle trans- 

 versely striated and bearing a multitude of fine needlelike spines 



Fig. 253. — Habronema SPINOSA. a, Spines ok cuticle ; b, head end; c, median lip; 

 d, male tail; c, left spicule; f, sight spicule; g, gorgbket; h, female tail. 

 After GBNDEB, V.V22 



(fig. 253a), visible at high magnification (560), their length about 

 4.4/x. Right cervical papilla anterior to left. One lateral ala, origi- 

 nating 2G to 30ft posterior to left papilla, which is 130 to 150/* from 

 the anterior end in the male, 1C>0 to 180/x. in the female. Ala shorter 

 and narrower than in //. monoptera; its width 8 to 12/x (see below 

 for length). Head (fig. 253&) very small; 4 lips all of same length. 

 The lateral lips with 3 or 4 teeth on the internal surface arc not as 

 large and projecting as in other species of Habronema, while the 

 dorsal and ventral lips (fig. 253c) are proportionately more highly 

 3612—27 14 



