NEMATODE PARASITES OF BIRDS 173 



4. Lateral ala extends along anterior half of body ; left cervical papilla a little 



anterior to the right ; short spicule 550 to OOO/a long ; gorgeret highly devel- 

 oped and of complex structure, being hollowed out and having a strong 



dorsal spur Habronema tulostoma, p. 184. 



Lateral ala does not extend posterior to termination of glandular esophagus : 

 right, cervical papilla anterior to the left ; short spicule not over 4G0m ; 

 gorgeret simple in structure or poorly developed and difficult to see 5. 



5. Male 5.5 to 6.9, female 8 to 9.4 mm. long; cuticle with many fine needle-like 



spines, 4.4-fi long; lateral ala 8 to 12/* wide; long spicule 1.2 to 1.4 mm. 



long Habronema spinosa, p. 183. 



Male 7.6 to 9.S, female 12.3 to 13.6 mm. long; no spines on cuticle; lateral 

 ala attains width of 18 to 22(i; long spicule 1.6 to 1.7 mm. long. 



Habronema monoptera, p. 180. 



6. Female 9.2 mm., male 5.5 mm. long. Vulva posterior to middle of body. 



Longitudinal folds of caudal alae posterior to cloacal aperture have teeth- 

 like projections on free border Habronema seurati, p. 182. 



Female 13 mm. or longer ; male 7 mm. or longer ; vulva anterior to middle 

 of body; no teeth-like projections on longitudinal folds of caudal alae 7. 



7. Dorsal and ventral lips very small and apparently lacking a median pro- 



jecting crest ; internal to the lips 2 rows of 3 papillae each, tipped by 

 denticles which project anteriorly beyond the lips. 



Habronema colaptes, p. 173. 



Dorsal and ventral lips well developed and having a median projecting crest ; 



no rows of papillae as above S. 



8. Lateral alae extending 1/2 of body length 9. 



Lateral alae extending not more than 1/4 of body length 10. 



9. Body rolled in spiral ; caudal alae symmetrical ; no unpaired papilla 



immediately anterior to cloacal aperture Habronema longistriata, p. 178. 



Body not rolled in spiral ; caudal alae slightly asymmetrical ; an unpaired 

 papilla present, immediately anterior to cloacal aperture. 



Habronema mansioni, p. 179- 



30. Lateral alae of unequal length, one about 1 mm. long, the other 50G> long, 



their margins strongly crenulated ; anus of female about 200^ from 



posterior extremity Habronema incerta, p. 175. 



Lateral alae of equal length, extending 1/4 of body length ; margin not 

 crenulated ; anus of female about 360^ from posterior extremity. 



Habronema leptoptera, p. 176. 



HABRONEMA COLAPTES Walton, 1923 



Host. — Primary: Colaptes auratus In frits; secondary: Unknown. 



Location, — In the mucosa of the proventriculus. 



Morphology. — Habronema (p. 172) : Yellowish-white worms of 

 medium thickness. Walton states that there are 2 lips but his figures 

 (fig. 244 <7, b and c) show, in addition, a dorsal and a ventral lip 

 present, though small, each divided into 2 lobes without a projecting 

 crest between them. Lips partially covered by a prepuce. Exter- 

 nally each of the 2 large lateral lips divided into 3 lobes, each lobe 

 with a small papilla; internally there are 2 rows of 3 papillae each. 

 tipped by denticles. Cervical papillae not observed. Lateral ahu- 

 ll arrow. 



