D 



PLUME-MOTHS OF CEYLON. / 



Fore wing four-lobed . . . . Heptaloba 



Fore wing three-lobed . . . . Deuterocopus 



Fore wing two-lobed . . 4 



Cilia with scale-tufts or specially modified 



scales, or either segment of f.w. banded 



transversely, or second .segment of f.w. 



with distinct tornal angle . any or all of 



these characters may co-exist . . 5 



Cilia with no scale-tufts or specially modi- 

 fied scales, neither segment of f.w. 



banded transversely, second segment of 



f.w. without any tornal angle : all these 



characters must co-exist . . 12 



Third segment of h.w. with no scale-tuft in 



dorsal cilia . . • • 6 



Third segment of h.w. with a scale-tuft in 



dorsal cilia . . • • 9 



( Cleft of f.w. less than half wing-length . . 7 

 I Cleft of f.w. at least half wing-length . . 8 

 Dorsal cilia of f.w. with scattered La 



black scales . . . • Exelastis 



7 I Dorsal eilia of f.w. without scattered large 



'[ black scales . . . . Stenoptilia 



| Only one nervure in first segment of f.w. ;* 



abdomen usually very large and stout, 



often strikingly ornamented dorsally ; 



resting position in life with wings spread 



out and closely appressed to the resting- 



surface . . . . Diacrotricha 



8 | Wore than one nervure in first segment of 



f.w. ;* abdomen usually rather small, 

 slender, and dull-coloured, and, if orna- 

 mented, the pattern is generally lateral ; 

 resting position in life with wings folded 

 up and held well clear of the resting- 

 surface .. .. Trichoptilus (part) 



c Second segment of f.w. linear . . Trichoptilus (part) 



( Second segment of f.w. not linear . . 10 



10 ( Segments of h.w. differently shaped . . Platyptilia 



( Segments of h.w. similarly shaped . . 11 



ti ( Ground-colour of wings pale ochreous .. Sphenarches 



( (bound-colour of wings not pale ochreous Oxyptilus 

 12 C F.w. with dark blotch before cleft . . Pterophorus 



( F.w. without dark blotch before cleft . . Alucita 



* Compare figures D and E in Plate ( 



