164 SPHINGIDJE. 



fourth, followed by a rather irregular line, on the disc two> 

 lines which run about parallel with the outer margin, the 

 inner one straight, the outer one curved as stated above. 

 Hind wing with faint discal line and a bluish-grey spot at 

 anal angle. Underside paler than above, both wings with one 

 or two distinct discal lines. 



<£. Tenth tergite narrowed to an acute hook ; sternite 

 represented by a low ridge ; between the sternite and the 

 penis-sheath there is at each side a strongly chitinized, needle- 

 like process. Clasper divided apically by a longitudinal 

 slit ; ventral processes of clasper fused together, completely 

 or partially, to form a single ventral process, while the sub- 

 mesial processes are quite unequal. The details of the armature 

 are very different in the specimens from different countries, 

 and there is also some individual variability. 



2. Eighth tergite mesially sinuate ; on the upper surface 

 of the lobes a projecting cone or lobe, or no further armature. 

 The vagina] plate agrees better with those of the members of 

 Clanis than with the plate of dentatus ; the ante-vaginal part 

 is very restricted, membranaceous, with a low, more strongly 

 chitinized, smooth ridge in front of the vaginal orifice ; the 

 post-vaginal plate very large, this plate visible in the speci- 

 mens after removal of part of scaling of seventh sternite ; 

 this armature different, like the eighth tergite, in the different 

 subspecies. The antenna similar to that of <£, the middle 

 and basal segments much higher than broad ; the horizontal 

 diameter of the ventral part of the trans-section about half 

 as long as the diameter of the dorsal part. 



P. t. sonanthis, from S. India, resembles P. t. luteatus, from 

 Ceylon, very closely in structure, but in colouring it agrees 

 better with P. t. trilineatus, being pale with a grey bloom, and 

 the dentate line between the two outer lines of fore wing 

 upperside being obscure or absent. 



$. Anal tergite somewhat longer than in luteatus, but 

 much shorter than in trilineatus and undatus. Anal sternite 

 a rather high thin ridge incurved in middle, where in luteatus 

 it is medianly produced into an obtuse lobe. Clasper as in 

 luteatus, the ridge on the harpe somewhat longer. Unpaired 

 ventrad process of penis-sheath not fish-tail like as in tri- 

 lineatus and undatus, but asymmetrical as in luteatus, the 

 apex dilated towards one side only, this projection a little 

 shorter than in luteatus. 



$. Post-vaginal plate somewhat more rounded laterally 

 than in undatus ; eighth tergite divided into two rounded 

 lobes, which do not bear a hump on upperside as they do in 

 undatus. 



Hab. S. India (North Kanara District), where we have 

 bred the subspecies. Rather local and rare, larvae being 

 found in forests with heavv rainfall. 



