270 MR. W. F. KIRBY ON RARK SPHINGIDiE. [May 4, 



fore wings are whitish at the base, this colour being narrowest at 

 the costa ; and rather below the costa is a small dark green spot 

 near the base. On the inner margin, a dark green oblong mark 

 curves upwards from the base, ceasing at one third of the distance 

 from the costa, and rather bej'ond it is an oblong white spot with a 

 dark-green centre. Below this, and beyond the oblong mark, the 

 wing is obscurely marked with blackish, and from the upper curve 

 of the oblong a dark obsolete mark curves towards the anal angle, 

 before which it becomes more distinct, and is bounded outside by some 

 whitish markings in the form of a W. In the middle of the wing 

 are three obsolete transverse lines, ceasing at the subcostal nervure — 

 the basal one dull green, the second obscurely blackish, and having 

 an oblong black spot within its upper portion, and the outer one much 

 waved, marked rather broadly with blackish above ; beyond it, just 

 below the subcostal nervure, is another blackish mark, hke a broad 

 V. The hind wings are reddish tawny, the hind margin being olive- 

 yellow, most broadly so at the anal angle, above which it is sur- 

 mounted by an irregular blackish blotch enclosing two white dots. 

 Wings beneath yellowish green or greenish yellow, the fore wings 

 being pale orange-yellow at the base to beyond the cell, and brighter 

 orange along the costa ; at the extremity of the cell is a blackish 

 spot. The outer portions of the fore wings are marked with three 

 obsolete green lines, converging towards a blackish spot at the anal 

 angle, and the hind wings with three similar lines, which do not 

 quite meet ; the outer ones terminate in blackish blotches, between 

 which stand two white dots. 



The obscure shades and markings of the fore wings of this and 

 the next species render them difficult to describe satisfactorily. 



The fore wings are strongly falcate, and the anal angle is very 

 strongly marked. The hind margin of the hind wings is bidentate 

 beyond the anal angle. 



3. Ambulyx tithonus, sp. n. (Plate XXVII. fig. 2.) 



Very similar to A. eos, but the upper surface is of a much duller 

 olive-brown ; markings of the head and thorax nearly similar. Fore 

 wings hardly white at the base and with a yellowish-olive band, 

 slightly edged with white, running less obliquely from the inner 

 margin just beyond the base to the median nervure, at which point 

 it is broader than in A. eos ; its outline is also more sinuous. Above 

 the median nervure, and beyond it, is an obscure olive-green spot, 

 flecked with white ; at the end of the cell is a black spot, beyond 

 which is a sinuous black line (double above) curving down to the 

 inner margin ; beyond it are two more waved blackish lines (the 

 first doubte) running from the subcostal nervure half across the 

 wing ; the hind margin and anal angle are shaded into olive. 

 Hind wings orange-tawny, paler at the anal angle, above which is a 

 black blotch marked with two white dots, from which runs an ill- 

 defined submarginal blackish stripe ; the hind margin is also narrowly 

 blackish. Wings beneath of a more imiform yellowish green than 



