48 



11. H. medialis Sm. 



12. H. pallescens Sm. 



13. H. senilis 8m. 



14. H. serrata Grt. 



PAPAIPEMA. 



15. H. cerina Grt. 



16. H. inqusesita G. and R. 



qu&sita Grt. 



17. H. speciosissiraa G. and R. 



18. H. rigida Grt. 



19. H. harrisii Grt. 



20. H. verona Sm. 



21. H. pnrpurifascia G. and R. 



leucostigma || Harr. 



22. H. nitela Gn. 



var. nebris Gu. 



EXPLANATION OF PLATE I. 



Male genitalia of Hydrwcia, the figures showing harpe and clasper in each ease. 

 The figures on plates 1 and 2 are numbered consecutively. 



1. H. albilunata 8m. 



2. H. u -album Hn. 



3. H. velata Wlk. 



4. H. interoceanica Sm. 



5. H. atlantica Sm. 



6. H. pacifica Sm. 



7. H. nictitans Linn. (Europe). 



8. H. juvenilis Grt. 



9. H. immanis Gn. 



10. H. stramentosa Gn. 



11. H. obliqua Harv. 



12. H. medialis Sm. 



13. H. pallescens Sm. 



14. H. senilis Sm. 



15. H. serrata Grt. 



16. H. cerina Grt. 



17. II. inqusesita G. mid 11. 



18. H. rigida Grt. 



EXPLANATION OF PLATE II. 



19. H harrisii (Irt. 



20. II. verona Sm. 



21. H. nitela Gn. 



22. H. nebris Gn. 

 ■!'■',. II. necopina <lrt. 



24. H. limpida Gn. 



25. II. cerrussata Grt. 



26. H. frigida Sm. 



27. H. unimoda Sm. 



28. H. angelica Sm. 



29. H. cataphracta Grt. 



30. H. impecuniosa Grt. 



31. H. circumlucens Sm. 



32. H. rutila Gn. normal. 



33. H. rutila Gn. distorted by flattening 



34. H. marginidens Gn. 



35. H. furcata Gn. 



36. H. pnrpurifascia G. and R. 



I'/irpurifiiftcia is out of its place in the, numbering; it should have followed //. 

 verona. No. 22 is the normal form in nitela; nebris, No. 21, has the clasper and 

 the harpe a little flattened. 



