348 LEPIDOPTERA. 



grey. Hind wings pale smoky brown, witli white cilia. 

 Female similar. 



Underside of the fore wings smok\' brown ; costa paler. 

 Hind wings smoky white. 



On the wing in July and the beginning of August. 



Larva delicate light green, with somewhat whitish incisions, 

 and a faintly darker dorsal line ; raised dots light green ; head 

 pale green, its outer edge with two brown markings. 



June and July on willow {Salix alba), between the higher 

 leaves, spun together. (Zeller.) 



The moth loves to sit by day on the branches and trunks 

 of willows, and on fences near them, but is not very willing 

 to fly at that time, and unless the weather is quite hot may 

 sometimes be boxed with perfect ease as it sits ; at other 

 times gets into the interstices of bark and runs up them, 

 or flies to the top of the tree. Sometimes common upon 

 the willows growing by the river Lea and along ditch 

 sides, near London. It is rarely seen in flight, and in the even- 

 ing probably keeps near the tops of the trees. Its favourite 

 haunts seem to be around London — in Essex, Kent, Surrey, 

 Middlesex, and Herts; — but it has been found also in Devon, 

 Cambs, near Scarborough, Yorkshire ; and commonly in 

 Herefordshire ; but I know of no other locality in these 

 Islands. Abroad it is found throughout Central Europe, 

 Northern Europe except the coldest portions, and Northern 

 Italy ; and in North America in Maine, Massachusetts, and 

 New York State. 



3. B. woodiana, Z)'a)r.' — Expanse | inch (IG mm.). Fore 

 wings bright white with black mottling and a large somewhat 

 x-shaped black spot from the costa bej^ond the middle. 



Antenufe reddish brown ; palpi, head, and collar black- 

 brown ; shoulder-lappets and thorax white, dotted with 

 black ; crest black-brown ; abdomen yellowish brown. Fore 

 wings short, rather broad, costa slightly arched, apex bluntly 



