Heterocert'us Lcpidoptera frum Madagascar. 27 



with black and more or less mottled with white and dull yellow ; 

 body below white or emerald-green, the legs banded with black. 

 Exj)anse of wings 33-52 mm. 



The pale and dark varieties are about equally common, the 

 dark or green type which I sliall call var. smaragdinus, being 

 more beautiful, but apparently more liable to become greasy 

 than the other. 



52. CilSsns pav/diis, n. sp. 



Wings above dingy-gi-ey, primaries finely striated and speckled 

 with black ; costal margin spotted with black ; a <-shap('(l black 

 marking before the middle of the interno-median ai-ea and two 

 ill-defined blackish spots on the disc ; fringe flecked with black ; 

 secondaries whiter than the primaries, the apical half striated 

 with grey rather darker than the ground colour ; fringe imper- 

 fectly spotted with blackish ; head, collar and prothorax smoky 

 brown ; antenna' with reddish-bro\vn pectinations ; uiider siuface 

 of wings sordid greyish-white striated \\ith grey ; primaries 

 with sericeous w hitisli inner border, a blackish subcostal dash 

 l^ieyond the middle ; secondaries sericeous white at base and 

 abdominal liorder ; body sericeous white ; abdomen and legs 

 sordid. Expanse of wings 37 mm. 



53. Cossus senex, n. s}i. 



Snow-white ; primaries finely striated with grey and ])lack ; 

 with three costal spots, of Avhich the central one is largest, almost 

 V-shaped, partly brown and partly black, situated at the basal 

 two-fifths of the costal area and extending across the cell ; the 

 other two spots black, the outer one sometimes ill-defiued ; a 

 small square spot at about th-e centre of the low er radial inter- 

 space, from each corner of Avhich an ii-regular fine black line is 

 emitted ; a small sinuous black line more distinct than the ordin- 

 ary stria} at external third of interno-median area, also a slender 

 subapical costal V-shaped character ; secondaries sericeous, the 

 apical half striated with grey ; collar ash-gre}', speckled with 

 black ; antenna) with sandy-brown pectinations ; wings below 

 white, the apical half striated with blackish ; jirimaries with the 

 costal border towards the base spotted with black ; a diffused 

 blackish patch before the end of the cell ; secondaries with an 

 oblique subbasal pinky-broAvn streak, obliterated in some exam- 

 ples ; fringe of all the wings grey spotted ; tars: l)arred with 

 black. Expanse of wings 34-44 mm. 



