PSEUDODOLBINA. 91 



of the fore wing prominent but not beaded, costal vein finely, 

 transversely striate, surface of wing-case transversely lined ; 

 hind wing shows beyond the hind margin of the fore wing 

 under the spiracle of 6 ; thorax and abdomen with transverse 

 corrugations, except on the front bevels of 9, 10 and 11, 

 which are coarsely pitted ; no sculpturing on 4 ; ante-spiracular 

 ridges on 9 to 11, four distinct ridges on each in two pairs, with 

 a smooth broad channel between each pair. Spiracle of 2 

 indicated by a long dull black transverse band, spiracles on 

 the other segments small, oval in shape, and including a more 

 narrow oval with a thin raised rim. Clasper-scar on 14 

 a deep, longitudinal, rather long furrow, with a tumidity 

 on each side of it, forming an oval mouth-shaped organ ; 

 in the £ pupa the sex-scar is a circular mouth with rather 

 prominent lips ; in the 2 the ventral margins of 14 and 13 

 are arched forwards, and the sex-scar, is a small depression 

 in the middle of 12, with a similar depression on 13. Cremaster 

 with a highly polished surface, stout, triangular, very narrowly 

 and shortly bifid at the tip ; dorsal surface rugose, ventral 

 surface shallowly hollowed out, the hollow oval in shape. 

 Colour dark chestnut, head and cremaster nearly black. 

 Length about 42 mm. 



Habits. — Eggs laid singly on the underside of a leaf of 

 Strobilanthes alatus Nees, and 8. dalhousianus C. B. Clarke, 

 family Acanthaceae, which, so far as we know, are unique 

 food-plants for sphingid larvse. There appears to be only one 

 brood in the year, as eggs and larvse are not found until the 

 monsoon is well established, and the pupae hibernate in 

 captivity. Pupation takes place in a cell underground. 



12. Pseudodolbina aequalis Rothschild & Jordan. (Fig. 16 A, 

 imago, B, genitalia). 



Pseudodolbina sequalis, Roths. & Jord., 1903, p. 101 (<$) (Assam) ; 

 Seitz, 1928, p. 530. 



Imago. — <$. Ground-colour of upperside of body and fore 

 wing of a peculiar greenish-olive colour, with a distinct shade 

 of yellow in fresh specimens. The interspace between the 

 two lines proximal of stigma on fore wing more or less filled 

 up with blackish scaling, at least in front. Pale parts of 

 fringe of both wings greyish-white with a shade of yellow. 

 Terminal spurs of hind tibia of almost exactly the same length 

 Expanse : 65 mm. 



<$. Harpe (fig. 16 B) sinuate at end, the two lobes nearly the 

 same in length. 



Hab. E. Himalayas (Khasi Hills ; Cherrapunji). Rare, and 

 early stages unknown. 



