118 SPHINGID^E. 



19. Oxyambulyx placida (Moore). (Fig. 21 A-C, genitalia). 



Ambulyx placida, Moore, 1888, p. 390 (Solon) ; Butler, 1889, p. 25> 



pi. cxxi, fig. 1. 

 Oxyambulyx placida. Roths. & Jord., 1903, p. 196, pi. ix, fie. 3 (<?) - r 



Seitz, 1928, p. 533, fig. 61 a. 

 Ambulyx sttbslrigilis, Hampson, 1892, p. 77 (non Westw.). 



Imago. — ^$. A very pale species. Fore wing similar to 

 that of sericeipennis, but first discal line, which is the only 

 distinct line, more distal, at R 3 about mid-way between cell 

 and the broad yellowish proximal border of the submarginal 

 line ; line across apex of cell in the same or nearly the same 

 direction as the streak upon R 3 ; subbasal spot behind cell 

 and a subbasal costal patch. Abdomen in £ with fine mesial 

 line, no patch on eighth tergite ; in $ without line. Underside 

 of wings deep chrome. Expanse : £ 104 mm., $ 114 mm. 



There are apparently two subspecies : 



(a) A pair from the W. Himalayas is very pale grey on fore 

 wing ; the line across apex of cell forms an obtuse angle with 

 the line upon R 3 ; the round subbasal spot behind cell small :, 

 the eighth sternite of the £ has a truncate-sinuate mesial lobe, 

 of which the angles are not distinctly toothed. 



(b) The individuals from Sikkim (E. Himalayas) have the 

 subbasal round patch of fore wing, behind cell, enlarged, 

 the line across apex of cell more horizontal, and the angles of 

 the lobe of the eighth sternite produced. 



$. Tenth sternite (fig. 21 A) deeply sinuate, the two lobes 

 rounded. Eighth sternite mesially with a lobe which is or 

 is not toothed at the angles. Harpe (fig. 21 B) broad ; distal 

 process rather short, somewhat concave above, curved down- 

 ward, obtusely pointed ; submesial process hollow, formed 

 by two lamellae being curved towards each other and together 

 produced distad, this process resembling that of japonica. 

 Penis-sheath (fig. 21 C) wider than in the allied species, 

 ventrally chitinized to end, armed with a short stout ventral 

 hook and an obliquely truncate dorsal process which is irregu- 

 larly notched. 



0. Vaginal area similar to that of liturata. 



Hab. W. and E. Himalayas. The early stages unknown. 



20. Oxyambulyx maculifera (Walker). (Fig. 22 E-I, genitalia). 



Ambulyx maculifera, Walker, 1866, p. 185 (Darjeeling, $) ; Butler, 

 1877 A, p. 580 ; id., 1881 B, p. 10, fig. 3. 



Oxyambulyx maculifera, Roths. & Jord., 1903, p. 197, pi. ix, fig. 4 

 (c?) ; Seitz, 1928, p. 534, fig. 61 d. 



Ambulyx consanguis, Butler, 1881 B, p. 11, pi. lxxx, fig. 2 (Dar- 

 jeeling, $). 



Ambulyx substrigilis, Hampson, 1892, p. 77, fig. 49 ($) (non Westw. ).- 



Imago. — <$$. Recognizable by the presence of a large sub- 

 basal patch at the costal margin of fore wing, the mesial line 



