NO TODONTIDyE. 1 1 3 



Underside of the fore wings smoky blackish with whitish 

 margins, and the nervures and dorsal streak blackish ; hind 

 wings white with a large blackish lunule, brown nervures, 

 and grey clouding, which, however, leaves a white transverse 

 band in the middle ; a dark brown line runs round the 

 margins of all the wings, outside which the cilia are whitish 

 dashed with grey ; body grey-brown ; legs reddish-brown. 

 Female browner. 



The ground colour varies from pale fawn colour to purplish- 

 brown, and the large oval blotch is sometimes tinged in the 

 clouded portion with red. while in other cases the clouding 

 is almost obliterated. In some specimens the marginal black 

 line is much thickened and intensified, forming quite a frame 

 to the fore wings, and in such individuals the inner parallel 

 ripples of colour are very strong. Mr. S. Stevens has a 

 specimen in which the middle of the fore wings is dark brown, 

 and is crossed by a longitudinal black bar which meets the 

 discal lunule. 



On the wing in May and June and in a complete or partial 

 second generation in August. Mr. W. H. Tugwell reports 

 having reared a third generation of moths in September. In 

 the south of England, and so far northward as Nottingham- 

 shire, a second generation is found to be constant and 

 tolerably complete ; but in the adjacent hilly districts, as 

 Derbyshire, the second emergence is partial only, and this 

 condition is observable in more northern English districts, 

 while in Scotland but one brood is usually obtained. In this 

 respect, however, the insect seems everywhere to be influenced 

 by the seasons and by local conditions. 



Larva. Head broader than the following segments and 

 slightly cleft at the top, four following segments moderately 

 slender, sixth and seventh each with a large and conspicuous, 

 broadly conical dorsal hump ; another, more flattened, on the 

 twelfth ; ventral prolegs large and strong ; anal prolegs 

 small and but little used ; anal segment tapering to a point 



VOL. III. H 



