156 CEYLON PEARL OYSTER REPORT. 



EXPLANATION OF PLATE. 



Fig. 1. Hal abates Jwrdmani, male, dorsal view, x 8. 

 2. female x 8. 



3. male, left feeler (terminal segments), x 20. 



4. female, right x 20. 



5. male, apex of shin, with tarsal segments. Upper aspect, x 40. 



6. Lower x 40. 



a, " file," b, " comb" of stridulating organ. 



7. male, " file " of stridulating organ, x 250. 



8. "comb" x250. 



9. female, apex of shin, with tarsal segments. Lower aspect, x 40. 



a, " file," b, " comb " of stridulating organ. 



10. female, " file " of stridulating organ, x 250. 



,,11. male, tip of proximal tarsal segment with distal segment of intermediate 



leg. x 40. 



12. male, tip of shin with tarsal segment of hind leg. x 40. 



13. ,, dorsal view of " genital " segments, x 40. 



,,14. male, ventral view of abdomen, showing hinder edge of thoracic sternum 



and coxa of left hind leg. x 40. 

 15. male, 8th abdominal segment isolated and viewed obliquely from the 



ventral aspect, x 40. 



16. female, dorsal view of end of abdomen with extended ovipositor, x 40. 



17. lateral x 40. 



18. ventral x 40. 



19. lateral view of retracted ovipositor, as seen after removal of the 



lateral sclerites of the 8th segment, x 40. 



In figs. 16 to 19: a, lateral sclerites of 8th abdominal segment; b, intersegmental membrane; c, genital 

 aperture ; c 1 , " hood " in front of ditto ; d, triangular, and d l , slender sclerites of 8th sternum ; e, anterior 

 gonapophyses ; e 1 , slender internal limb of ditto; /, sclerite of 9th abdominal segment; g, outer posterior 

 gonapophyses ; /Dinner posterior gonapophyses; i, membrane extending between gonapophyses;.;', 10th 

 abdominal segment ; k, anal segment. 





