SPHINGIDM. 23 



apex, hind margin flatly, but regularly, curved, and edged 

 by faint scallopings ; anal angle rounded. 



Fore wings hoary grey ; in the male having the central 

 portion much clouded with blackish, this blackish portion 

 edo-ed on the side next the base by an indistinctly blackish 

 line, which, arising on the costa at about one-third the length 

 of the wing, makes a considerable bend, and then returns so 

 as to reach the dorsal margin at the base of the wing. Out- 

 wardly this dark central clouding is ill-defined, and often it 

 is divided by the ground colour ; but in it are two or more 

 long black streaks lying upon nervures, and often it is spread 

 beyond the middle of the wing in irregular rippled dark grey 

 clouds, while a blackish cloud lies along the apical portion of 

 the wing, and another near the hind margin, both containing 

 deep black streaks. The female has none, or very little, of 

 the blackish clouding, but has the long black streaks on the 

 nervures and near the apex and hind margin stronger and 

 more distinct. Hind wings, in both sexes, very pale grey, 

 paler at the base, near which lies transversely a large, ill- 

 defined black stripe ; a dark grey transverse band, often 

 divided in the middle portion, crosses the centre of the wing, 

 and beyond it is another near the hind margin. Cilia grey 

 spotted with white. 



Underside dull grey ; fore wings with a faintly indicated, 

 darker, transverse fascia, pale-margined on each side, lying 

 beyond the middle ; hind wings banded with dark and pale 

 grey as above, but more faintly ; legs and body grey. 



Apparently not variable. 



On the wing in August and September, but on one or two 

 occasions has been taken in June. Such specimens are 

 believed to result from late larva?, of which the pupa3 have 

 remained unchanged through the winter. 



Larva four inches long and stout in proportion, rather 

 tapering in front; each segment of the body divided into 

 rings by parallel wrinkles ; skin smooth, but not glossy ; horn 



