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 . 16. suffumata. 



without white apical streak . 13. truncata. 



25. Forewings fuscous .... 26. 



pale ochreous . . .33. decolor ata. 



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



,, 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. badiata. 



curved . .22. rubidata. 



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



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. unifasciata. 



hardly bent . . 2. simulate. 



36. Forewings brown ..... 37. 



yellow -whitish irrorated with dark 



fuscous .... 38. 



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



without such spot . . 29. taeniata. 



38. Forewings largely suffused with ochreous-yellow 



1 8. flavicinctata. 



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 



