298 sphingid^. 



brown lines more prominent than in the other species ; first 

 discal line heavy, straight from R 3 to inner margin, anteriorly 

 merged together with an oblique band which reaches distal 

 margin just before hind angle ; grey submarginal band 

 ending at or just beyond R 3 ; distal margin dentate. Hind 

 wing : an indistinct brown discal line, followed by an indis- 

 tinct, paler, slightly tawny band. Underside of abdomen, 

 hind wing and disc of fore wing along marginal band bright 

 tawny ; white scaling at costal margins between the lines 

 conspicuous. Antenna shorter than in naga, agreeing with 

 those of the following species. Expanse : £ 96 mm., $ 106 mm. 



$. Tenth sternite (fig. 74 G) widest in middle. Process of 

 harpe (fig. 74 H) distally more rounded than in naga, the 

 ventral ridge higher and not dentate. Left process of penis- 

 sheath broad (fig. 74 I). 



Hab. E. Himalayas to the Philippines. Rare, and early 

 stages not known. Mell has bred the subspecies A. s. rufescens 

 in S. China. 



94. Acosmeryx omissa Roths. & Jord. (Fig. 74 J-L, geni- 

 talia). 



Acosmeryx omissa, Roths. & Jord., 1903, p. 530 (Busa, Bhutan) ; 



Seitz, 1929, p. 551, t. 63 c. 

 Acosmeryx ancea, Hampson (non Stoll), 1892, p. 81. 



Imago. — ffi. Easily confused with S. sericeus. Upperside 

 far more uniform in colour, much less variegated with grey 

 and chestnut. Fore wing : antemedian curved band less 

 extended brown than in s. sericeus, the two lines composing 

 it being separated for the greater part ; first discal line thin, 

 broken at the veins like the following lines, bars M 1 to M 2 of 

 lines 3 and 4 heavier and closer together, often forming a 

 single patch ; oblique band as in s. sericeus in position, nar- 

 rower in front, more or less dilated distad at R 2 . The discal 

 and submarginal obscure bands of hind wing of s. sericeus 

 also present in omissa. Underside : costal margin less marked 

 with greyish- white than in s. sericeus, the tawny colour more 

 restricted and less bright ; brown discal border of hind wing 

 with a distinct white line as in s. sericeus, the border widest 

 between R 2 and R 3 . not upon R 2 . Abdomen less bright 

 tawny and breast more olivaceous than in s. sericeus. Ex- 

 panse ; cJ$, 92-100 mm. 



$. Tenth sternite (fig. 74 J) slightly widened apically. 

 Process of harpe (fig. 74 K) less triangular than in s. sericeus, 

 hind edge not so heavily dentate. Left process of penis- 

 sheath (fig. 74 L) nearly horizontal. 



Hab. E. Himalayas (Bhutan ; Sikkim). Rare ; early 

 stages unknown. 



