PLATE XL. 



Euterpe gracilis. 



Fig. 1. Adult male. 



2. Anterior antenna, male. 



3. Anterior antenna, female. 



4. Posterior antenna. 



5. Mandible. 



6. Maxilla. 



7. First foot-jaw. 



8. Second foot-jaw. 



9. Firstfoot. 



10. Second foot. 



11. Inner branch of third foot. 



12. Fourth foot. 



13. Fifth foot, female. 



14. Fifth foot, male. 



15. Appendages of first abdominal segment of 



male. 



16. Tail of male. 



Ectinosoma melaniceps. 



17. Anterior antenna. 



18. Second foot-jaw. 



19. Firstfoot. 



20. Fifth foot. 



