Explanation of Plate XVIII. 



Fig. 1. Penicillidia jenynsi, (J , dorsal view of abdomen. 



2. „ „ „ ventral view of abdomen. 



3. P. jenynsi, 5 , abdomen dorsal. 



4. ,, ,, abdomen ventral. 



5. ,, ,, apical part of plate before the genital 

 opening, enlarged. 



6. P. jenynsi, larva, dorsal view. 



7. „ lateral view of anterioi- constricted part. 

 8- ,) front ,, ,, „ ,, 



9. Nycteribia insolita, ,^, abdomen dorsal. 



10. „ ,, ,, ventral view of anal segment. 



11. iV. insolita, $ , abdomen dorsal. 



12. „ „ thorax and abdomen, ventral. 



13. „ ,, front aspect of middle femur and tibia. 



14. Nycteribia sauteri, ^, front aspect of middle femur and 



tibia. 



15. Nycteribia sauteri, ^^^ , abdomen dorsal. 



16. ,, ,, ,, „ ventral. 



17. N. sauteri, 5 ■, abdomen dorsal. 



18. „ ., thorax and abdomen, ventral. 



19. Cyclopodia roylei, (^ , abdomen dorsal (smaller scale). 



The figures were all made with the helj) of a drawing-apparatus. 

 Figs. 16 and 18 (the ventral aspects of the abdomen) appear shorter 

 than the corresponding dorsal aspect (Figs. 15 and 17) owing to 

 curvature of the abdomen. 



