hydriomena] HYDRIOMENIDAK 209 



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



„ „ „ not bifid . 27. 



23. Central prominence largo .... 24. 



„ „ small . . .25. 



24. Forewings with white apical streak . 1G. suffvmata. 



,, without white apical streak . 13. truncata. 



25. Forewings fuscous .... 26. 



„ pale ochreous . . . 33. decolorata. 



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. hadiata. 



„ ,, curved . . 22. rubidata. 



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. unifasciata. 



„ „ hardly bent . . 2. simulata. 



36. Forewings brown ..... 37. 



„ yellow -whitish irrorated with dark 



fuscous .... 38. 



37. Forewings with white apical suffused spot 15. cori/hita. 



„ without such spot . . 29. taeniata. 



38. Forewings largely suffused with ochreous-ycllow 



1 8. flavicinctata. 



„ not suffused with yellow . . 17. caesiata. 



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



markings ochrcous-brown, mixed with black and leaden-grey; n 



