NEPHELE. 325 



spurs very unequal, the short spur of mid-tibia and the short 

 terminal one of hind tibia with a comb of stout spines, which 

 extends on the mid-tibial spur from the base to the naked 

 apical point, while it is more reduced on the hind tibial spur ; 

 fifth tarsal segment shorter than fourth ; hind edge of merum 

 of mid- coxa carinate, subangulate. Distal margin of fore 

 wing entire ; D 2 of hind wing curved or angulate. 



" <£. Sexual armature nearly the same in all the species ; 

 no appreciable difference in these organs between allied 

 species. Tenth tergite very slender, simple, curved down- 

 wards, long ; sternite short, horizontal, with almost parallel 

 sides and rounded apex, not strongly chitinized. Clasper 

 sole-shaped ; large friction-scales arranged in one or two rows ; 

 harpe ending in a sharply pointed, more or less evenly curved 

 hook. Penis-sheath armed at end with two dentate processes, 

 the proximal one long, curving round the mouth of the sheath 

 (as in several Macroglossum), the other short and obtuse ; 

 the armature reminding one strongly of that found in Macro- 

 glossum. 



" $. Eighth tergite truncate -sinuate. Vaginal plate small, 

 weakly chitinized, excepting postero-lateral edges which are 

 somewhat incrassate ; orifice free, a little projecting. Seventh 

 sternite broader than long, apical margin short, with strongly 

 rounded angles " (Roths. & Jord., 1903, p. 550). 



Hob. Aethiopian and Oriental Region. One Indian species, 

 occurring in two forms. For the early stages see under that 

 species. 



109. Nephele didyma (Fabr.). 



Imago. — <£$. Head, thorax and abdomen olive-brown or 

 green ; abdomen with lateral black segmental bands. Fore 

 wing olive-brown or green, with six waved, transverse lines and 

 an angled submarginal line, the space between it and outer 

 margin paler. Hind wing raw- umber colour, with a tint of 

 russet, or more russet ; outer marginal area darker in tint ; 

 cilia ochreous. Underside paler, each wing with two trans- 

 verse fines. Short terminal spur of hind tibia with a few 

 rather thin spines in the distal half. 



Two forms, which occur together. 



f. didyma (Fabr.). (PL IV, fig. 13, larva ; fig. 14, 

 pupa). 



Sphinx didyma, Fabricius, 1775, p. 543 (Ind. or.). 

 Nephele didyma f. didyma, Roths. & Jord., 1903, p. 554 ; Seitz, 

 1929, p. 554, t. 63 d. 



