128 SPHINGIDJE. 



line of fore wing vestigial above, absent below ; long scales 

 of fringe of hind wing white. Process of harpe (fig. 21 1) 

 shorter and slenderer than in 0. s. substrigilis ; process of 

 penis-sheath stouter. 



o. Not known. 



Larva (as figured by Moore (1882)). — Green, a white 

 subdorsal line from segment 2 to base of horn, six yellowish 

 oblique stripes, a whitish subspiracular stripe, interrupted ; 

 horn stout. Food-plant Dipterocarpus . 



Pupa. — Also figured by Moore, but details not clear. Shows 

 a prominent cremaster ; apparently no tubercles on head. 



Hab. Ceylon. The subspecies is very rare. 



25 b. Oxyambulyx substrigilis aglaia Jord. (PI. II, fig. 2, 

 larva). 



Oxyambulyx substrigilis aglaia, Jordan, 1923, p. 188 (North 

 Kanara) ; Seitz, 1925, p. 534. 



Imago. — <J$. This subspecies (and other subspecies of 

 0. substrigilis) is easily distinguished from other species of 

 Oxyambulyx by the large black or tawny basal patch of hind 

 wing upper side. Dorsal line of abdomen distinct, but not 

 dilated to a patch on eighth tergite. The costal subbasal 

 spot on fore wing upperside usually absent, but sometimes 

 nearly as large as the one behind cell. Fore tibia with 

 spines at end. 



ft. Fore wing upperside more grey than in 0. liturata^ 

 agreeing in this respect better with 0. sericeipennis ; under- 

 side of body, palpi and wings and upperside of hind wing 

 deep orange -fulvous. 



2. Fore wing upperside, the antemedian pair of lines less 

 distinct than 0. s. substrigilis, sometimes absent, closer together 

 before hind margin and here more oblique. On underside 

 wings more sparsely irrorated with brown. In two colour 

 forms : a pale form nearly as bright tawny-ochraceous as 

 0. belli, underside brighter orange than 0. s. substrigilis ; 

 and a dark drab form darker than any 0. s. substrigilis $$, 

 with the markings of hind wing above smaller. 



ft. Tenth sternite mesially sinuate, the sinus smaller than 

 in liturata, placida, etc. Eighth sternite mesially produced 

 into a truncate lobe, of which the angles are somewhat 

 pointed, each bearing, moreover, internally a pointed tubercle 

 or tooth, which is just visible in a ventral view of the segment. 

 Harpe varying strongly geographically, and slightly also 

 individually ; it consists of a ventral and a submesial ridge ; 

 the ventral ridge is either denticulate or entire ; the upper 

 ridge is produced into a long, tapering, pointed, curved, 

 somewhat twisted process, which stands nearly vertically 



