10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



Plate 2 



Hastospiculum spinigerum 



Fig. 7. Anterior end of female, showing niouth, anterior end of esophagus, and 

 vulva. 



8. Posterior end of male, showing bursa-like structure and spicules. 



9. Bursa-like structure, enlarged. 



10. End view of mouth region, showing mouth opening, two pillar-like 



structures with three papillae at the base of each, and crater-like oral 

 region. 

 10a. Egg. 



11. Portion of cuticle on anterior part of bodj' of female. 



Plate 3 



Thylaconema sigmura 



Fig. 12. Anterior end of female, showing head, esophagus, and vagina. 



13. Posterior end of female, showing anus, tail and posterior loops of ovaries. 



14. Head, much enlarged, showing buccal cavity and slender connection 



with esophagus. 



15. Posterior end of male found with the type female, showing alae and 



spicules. 



REFERENCES CITED 



Chandler, Asa C. 1924. New filariae from Indian Birds. Parasitology, 



Cambridge, [Eng.], vol. 16, December, pp. 398-404, figs. 1-10. 

 VON LiNSTOw, O. 1883. Nematoden, Trematoden und Acanthocephalen, 



gesammelt von Prof. Fedtschenko in Turkestan. Arch. f. Naturg., Berlin., 



49. J., vol. 1, pt. 2, pp. 274-314, pis. 6-9, figs. 1-52. 



1899. Nematoden aus der berliner zoologischen Sammlung. Mitt. a. d. 



zool. Samml. d. Mus. f. Naturk. in Berlin, vol. 1, pt. 2, pp. 3-28, pis. 1-6, figs. 



1-78. 

 Railliet, A.; and Henry, A. 1910. Deux especes nouvelles du genere A procia 



Linstow. Bull. Soc. de path, exot., Paris, vol. 3, pt. 3, 9 March, pp. 152-155. 

 Skrjabin, K. I. 1917a. Aprocta microanalis nov. sp., nouvelle filaire des yeux 



d'oiseaux. Compt. rend. Soc. de biol., Paris, vol. 80, pt. 6, 17 March, pp. 



303-306, figs. 1-3. 



1917a. Sur quelques nematodes des oiseaux de la Russie. Parasitology, 



Cambridge, [Eng.], vol. 9, pt. 4, July 27, pp. 460-481, fig. 1,'pls. 18-19, figs. 



1-19. 

 Travassos, Lauro. 1918. Contribuigao para o conhecimento da fauna hel- 



minthologiea brazileira. VII. Especies brazileiras do genero Thelazia Bosc. 



1819. Rev. do Mus. Paulista, Sao Paulo, vol. 10, pp. [215J-230, 3 pis., figs. 



1-13. 

 YoRKE, Warrington; and Maplestone, P. A. 1926. The nematode para- 

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o 



