62 LEPIDOPTERA. 



much intensified as greatly to darken the colour of the fore 

 wings with smoky clouding, and even to extend to the thorax. 

 In ]\Ir, W. H. B. Fletchers collection is a male in which the 

 first and second lines do not cross the wings, but are itnited 

 in the middle so as to form a large loop or blunt triangle from 

 the costa. 



On the wing in August, September, and the beginning of 

 October. 



Laeva elongate, twig-like ; skin shining ; slightly tajjering 

 forwards ; having a large dorsal hump and lateral enlarge- 

 ments on the sixth segment, a small transverse dorsal promi- 

 nence on the ninth, and two small points on the twelfth ; also 

 four ventral warts in a transverse line on the seventh, and 

 three anal points ; sides puckered ; third pair of legs placed 

 on a fleshy cushion ; head rounded and flattened, dull brown, 

 paler than the ground colour, which is dark hazel-brown, 

 mottled and shaded with purplish-brown ; undersurface paler, 

 with a greenish tinge, the portion between the prolegs 

 whitish ; jDrotuberances tipped with ochreous ; there are 

 faint traces of ochreous subdorsal lines on the anterior 

 segments. (C. Fenn.) 



May to July on alder, birch, and sallow ; feeding at night ; 

 remaining during the day at rest in the position of a twig 

 of its food-tree. 



Pupa stout, thoracic portion nearly cylindrical, the abdo- 

 minal segments very smoothly tapering off; top of the head- 

 cover strongly ridged ; surface devoid of gloss ; gi'eyish- 

 ochreous or yellowish -ochreous, reticulated and dusted with 

 dark brown ; the wing- and limb-covers whitened with a shelly 

 superficial coating which is cut up in all directions by fine 

 incised lines, and has a curious appearance ; that portion 

 covering the antennte being, however, beautifully sculptured 

 with the joints and pectinations thereof ; segments very much 

 roughened superficially with fine wrinkles, but a band at the 

 hinder margin of each is quite smooth ; cremaster extraordi- 



