288 Scientific Proceedings, Royal Duhlin Society. 



PLATE XXIII. Hypoderma lincatum. Female. 

 Fig. 



13. Terminal abdominal segments (numbered vi-ix) which form the ovipositor. 



Lateral view, x 10. 



14. The same. Dorsal view, x 10. sp., spermathecae. 



15. The same. Ventral view, x 10. 



16. Tip of ovipositor. Lateral view. x84. 



17. The same. Dorsal view, x 84. 



18. The same. Ventral view, x 84. 



In figures 16, 17, and 18, the terga (T), sterna (St.), and paired processes 

 (P) of the various segments are numbered (8, 9, and 10). 



19. Spines of the intersegmental membrane in front of the eighth sterna, x 225. 



PLATE XXIV. Hypoderma hovis. Male. 

 Fig. 



20. Reproductive organs. General dorsal view, x 10. Te., testis ; v.d., vas 



deferens. A.G., accessory gland ; D.e., ejaculatory duct ; S.e., ejaculatory 

 sac, below which are seen the terminal abdominal segments. 



21. Ejaculatory Sac. Side view, x 50, showing the apodeme. 



22. Terminal abdominal Segments and Genital Armature. Lateral view, x 50. 



23. Theca of Penis and Gonapopyhses. Postero-ventral view, x 50. 



24. Terminal abdominal segments and Genital Armature. Ventral view, x 50. 



25. The same. Dorsal view, x 50. 



In figures 22, 23, 24, 25, and also in figures 26, 27, 28, 30 (Plate XXV) the 

 terga (T), sterna (St.), paired processes (P), and gonapophyses (G., G.i., 

 internal, and G.e., external) of the various segments are numbered (6, 7, 8, 

 or 9). D.e., ejaculatory duct. ; S.e., ejaculatory sac, with apodeme ; Ap., great 

 apodeme; Th., theca of penis; S., its median spine; Th'., its lateral 

 processes; Pe., glans penis; p., anterior ridge-procss of ninth segment; 

 ep., epipleuron of ninth segment. In figures 24, 25, and 29, the roman 

 numerals (vi-x) indicate respectively the terga of the segments. 



