NEMATODE PARASITES OF BIRDS 187 



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

 mediate host. 



Distribution. — South America (Brazil). 



For discussion of the relation of this species to II. tuJostotna, see 



page 185. 



Genus HADJELIA Seurat, 1916c 



Synonym. — Gilsonia Gedoelst, 1919. 



Generic diagnosis. — Spirurinae (p. 161) : Head distinct. Cuticle 

 thick, finely striated transversely. No lateral alae; cervical papillae 

 at level of nerve ring. Mouth limited by 2 lateral trilobed lips; cer- 

 vical cuticula prolonged anteriorly to form a discreet collar ("cadre" 

 of Seurat) which is 6-lobed and provided with 2 pairs of papillae. 

 Male with unequal spicules and with well-developed caudal alae. 

 Female with vulva in anterior part of body, opening anterior to 

 end of esophagus; ovejector tubular, very long. Uteri divergent; 

 eggs embryonated at maturity. 



Parasitic in gizzard of birds, in the hollow tunnels under the 

 corneous tunic. 



Type-species. — Hadjelia Ihuillieri Seurat, 1916c. 



KEY TO SPECIES OF HADJELIA 



1. Eggs 21(1 long Hadjelia truncata, p. 190. 



Eggs 46/x or longer 2. 



2. Females not over 9.7 mm. long ; buccal cavity of female 32 to 37/x long. 



Hadjelia parva, p. 189. 

 Females 12 mm. or longer ; buccal cavity of female 50> or longer 3. 



3. Vulva salient and limited by 4 or o large nipple-like protuberances formed by 



the cuticle and usually arranged cross-wise Hadjelia inermis, p. 188. 



Vulva only slightly salient, with no such cuticular formations described. 

 Male unknown Hadjelia Ihuillieri, p. 187. 



HADJELIA LHUILLIERI Seurat, 1916c 



Host. — Primary : Gaccabis petrosa; secondary : Unknown. 



Location. — Gizzard. 



Morphology. — Iladfelia (p. 187) : Blood red in color, slender, 

 greatly attenuated anteriorly. Head distinct. No lateral ala. Cervi- 

 cal papillae at level of nerve ring. Mouth with 2 lateral trilobed lips 

 (fig. 257), the marginal lobes larger than the median. Six lobes 

 to cuticular collar, of which 2 are lateral, 2 dorsal and 2 ventral; a 

 large papilla on each dorsal and ventral lobe, thus making a total of 

 4 papillae. Buccal cavity cylindrical, short. 



Male unknown. 



Female 19.5 mm. long by 28G> wide. Buccal cavity 60/x, entire 

 esophagus 3.1 mm. long, muscular esophagus 48G>. Tail short, anus 

 110/x, from posterior end. Vulva 2.9 mm. from anterior end of body, 



