hydriomena] HYDRIOMENIDAE 209 



22. Central prominence of median band bifid . . 23. 



„ ,, ,, ,, not bifid . 27. 



23. Central prominence large . . . .24. 



„ ,, small . . . 25. 



24. Forewings with white apical streak . IG. suffumata. 



,, without white apical streak . 13. truncata. 



25. Forewings fuscous .... 26. 



„ pale ochreous . . .33. decolor ata. 



26. Edge of basal patch distinctly whitish 31. ahhemillata . 



„ „ „ not whitish . . 32. affinitata. 



27. Anterior edge of median band angulated in middle 



14. silaceata. 

 „ „ „ not angulated in 



middle . . 28. 



28. Posterior edge of median band blackish on upper 



half only . 29. 



„ ,, ,, not blackish on 



upper half only 30. 



29. Edge of basal patch acutely angulated . 20. hadiata. 



„ ■„ cuz'ved . . 22. ruhidata. 



30. Discal dot of forewings ringed with pale . 37. fluviata. 



not ringed with pale 



31. 



31. Forewings rather elongate . . 39. lapidata. 



,, not elongate . . . .32. 



32. Median band with distinct central prominence . 33. 



,, ,, nearly evenly waved . . 36. 



33. Median band followed by two strong white striae 



34. albulata. 

 „ ,, ,, by one white stria . . 34. 



34. Median band grey . . . 28. minorata. 



„ ,, brown . . . .35. 



35. Edge of basal patch angulated near costa 30. iinifasciata. 



„ ,, hardly bent . , 2. simulata. 



36. Forewings brown ..... 37. 



,, yellow -whitish irrorated with dark 



fuscous .... 38. 



37. Forewings with white apical sufiused spot 15. corylata. 



„ without such spot . . 29. tneniata. 



38. Forewings largely suffused with ochreous-yellovv 



18. Jlavicinctata. 



„ not suffused with yellow . .17. caesiata. 



1. H. ocellata, L. 25-27 mm. Forewings ochreous-white ; 



markings ochreous-brown, mixed with black and leaden-grey ; a 



p 



