PLATE XX. 



Figs. 1-13. Euchceta hessei, n. sp. 



Fie\ 1. Male, seen from left side, magnified 40 diameters. 



Fig. 2. Anterior antenna of female. 



Fig. 3. Posterior antenna. 



Fig. 4. Mandible. 



Fio-. 5.' Maxilla of female. 



Fig. 6. Maxilla of male. 



Fig. 7. Anterior foot-jaw of female. 



Fig. 8. Posterior foot-jaw of female. 



Fig. 9. Posterior foot-jaw of male. 



Fig. 10. Terminal spines of one of the swimming feet. 



Fig. 11. Fifth pair of feet of male. 



Fio-. 12. Abdomen of male. 



Fig. 13. Abdomen of female. 



Figs. 14-19. Euchceta pulchra (Lubbock). 



Fig. 14. Maxilla of female. 



Fig. 1 5. Posterior foot-jaw of male. 



Fig. 16. Posterior foot -jaw of female. 



Fig. 17. Fifth pair of feet of male. 



Fig. 18. Terminal spine of one of the swimming feet. 



Fig. 19. Abdomen of male. 



