168 SPHINGIDiE. 



The larva and pupa so closely resemble those of P. dentatus 

 that we mistook them for those of that species, and did not 

 describe them. The food-plant is Ehretia Isevis Roxb., of 

 the family Boragineae, and the habits similar to those of 

 P. dentatus. Very delicate and difficult to rear. 



37 d. Polyptychic trilineatus undatus Roths. & Jord. (Fig. 33 

 T>-F, genitalia). 



Polyptychus trilineatus undatus, Roths. & Jord., 1903, p. 238 

 (Assam; Sikkim); Jordan, 1911, p. 240, t. 37c; Seitz, 

 1928, p. 537. 



Smerinthus dentatus, Walker (non Cram., 1777), 1856, p. 252. 



Polyptychus dentatus, Hampson (non Cram.), 1892, p. 69. 



Polyptychus dentatus var. timesius, Dudgeon (non Stoll), 1898, 

 p. 406 (Sikkim, 1,800 ft.). 



Imago. — ^$. Body and wings olive mummy-brown, with 

 a pinkish-grey flush ; disc of fore wing sometimes paler in 

 patches, in which case a brown shadowy band situated beyond 

 the antemedian line becomes more conspicuous. 



£. Tenth tergite (fig. 33 E) a long strong hook, while the 

 sternite is a small fold. The dorsal lobe of clasper (fig. 33 D) 

 rather weak, apically dilated and bent inwards, irregularly 

 ladle-shaped, the ventral lobe ending in two heavy teeth ; 

 the unpaired process common to both harpes fish -tail -shaped ; 

 the lateral processes of harpe very unequal, that of the right 

 harpe being long and pointed, projecting beyond ventral 

 edge of clasper, while the process of the left clasper is short 

 and more or less obtuse. The needle-like process between 

 clasper and tenth sternite very prominent. 



$. Eighth tergite with a sharp prominent cone upon the 

 upper surface at each side, pointing distad. Vaginal armature 

 (fig. 33 F) with a large post-vaginal plate which is very promi- 

 nent ; the distal margin slightly bi-emarginate, the mesial 

 portion somewhat produced and bent ventrad, so that the 

 plate appears mesially almost sinuate in an anal aspect ; 

 the angles of the plate rounded. 



Hah. E. Himalayas (Khasi Hills ; Sikkim) ; Burma (May- 

 myo). 



The larva has been very briefly described by Boisduval, 

 and appears to be similar to those of the other subspecies so 

 far as they are known. 



37 e. Polyptychus trilineatus mincopicus Jordan. 



Polyptychus trilineatus mincopicus, Jordan, 1930, p. 3 (Andamans). 



Imago. — J. In colour and pattern like P. t. undatus, differing 

 only in the genital armature ; the two apical teeth of harpe 

 almost of equal length, nearer together than in P. t. undatus ; 



