124 SPHINGID^E. 



forms. Penis-sheath (fig. 23 L) curving dorsad, with a dorsal 

 tow of teeth, apex truncate ; a stronger chitinized ventral 

 fold bearing three heavy teeth. 



Hab. W. Himalayas ; one $ in the British Museum ; £ an ^ 

 early stages not known. 



23. Oxyambulyx ochracea (Butler). (Fig. 22 J-M, genitalia). 



Ambulyx ochracea, Butler, 1885, p. 113 (Japan). 



Oxyambulyx ochracea, Roths. & Jord., 1903, p. 199, pi. viii, fig. 14 

 (cJ) ; Jordan, 1911, p. 238, fig. 37 a ; Mell, 1922, p. 92, pi. xvi, 

 figs. 13, 14 (pupa), pi. xxiii, figs. 8, 9 (<J$) ; Seitz, 1928, p. 534. 



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



Imago. — $o. Both sexes without a dorsal line on abdomen, 

 l)ut the $ has a patch on the eighth tergite. The posterior 

 subbasal patch of fore wing very large, larger than the costal 

 patch. The <J is the most uniformly yellow species of the 

 Indo -Malayan Oxyambulyx ; the 2 is darker than the <$. 

 In both sexes the distal submedian line crosses M at the base 

 of M 1 , the portion of the line within the cell being less oblique 

 than in maculifera, schauffelbergeri and others, not extending 

 distad to the lower angle of the cell. Expanse : <$ 92-104 mm., 

 $114 mm. 



(J. Eighth sternite of abdomen mesially rounded. The 

 harpe (fig. 22 K) has a blunt, concave, distal process, the 

 mesial ridge short and produced into a heavy tooth ; the 

 ridge connecting this tooth with the distal process irregularly 

 dentate. Penis-sheath (fig. 22 L) bears no armature besides 

 the dorsal process, which, being obliquely truncate in a ventro- 

 dorsal direction, is sharply pointed. Tenth sternite (fig. 22 J) 

 very much broader mesially than in sericeipennis and schauffel- 

 bergeri, and has, as in these species, no mesial sinus. 



$. Vaginal plate (fig. 22 M) with a high ridge before the 

 cavity, the ridge deeply sinuate, the sinus widened proximally, 

 the lobes of the ridge thus formed strongly rounded, projecting 

 mesiad ; post vaginal part of plate with the sides oblique, 

 shallowly sinuate, apex rounded. 



Hah. E. Himalayas to China and Japan. Mell has bred 

 the species in S. China. 



Egg. — A slightly depressed ovoid ; surface smooth and 

 shining ; colour pale green. Length 2 mm. ; breadth 1-4 mm. ; 

 height 1-2 mm. 



Larva : — 



1st instar. Head broader than body ; horn short, straight, 

 tip broadly bifid ; head brownish, body greyish-green, set 

 with fine bristles, all of the same length, on each segment ; 

 horn black with the base shortly reddish-brown. 2nd instar. 

 Head broader and higher than segment 2, without processes 

 on the vertex ; body dull brownish-yellow, horn straight, 

 reddish-brown, the broadly bifid tip black. 



