i6o LEPIDOPTERA. 



larva uutil April or May. Sometimes the cocoons are 

 formed in groups upon the rotten wood. 



The moth sits on the rough bark of oak-truuks during 

 the day or sometimes upon the rougher branches. It is shy 

 and restless and darts down or away when disturbed ; but at 

 about 8 P.M. flies boldly and vigorously over and about the 

 trees. It is rather frequently to be found in the London 

 parks and suburbs, looking somewhat conspicuous as it rests 

 upon the dark trees, but by no means always allowing itself 

 to be boxed. Also found upon oaks elsewhere in Surrey, 

 Middlesex, and Kent, and also \\\ Sussex, Dorset, Devon, 

 Somerset, Wilts, Essex, Suffolk, Norfolk, Herefordshire, 

 and very locally in Lancashire, Yorkshire and Westmore- 

 land. This, so far as I have any certain knowledge, is the 

 extent of its range in these Islands. Abroad it is known in 

 most parts of Central Europe, and also in Sweden and 

 Dalmatia. 



5. C. nimbana, H.H. — Expanse § inch(lG mm.). Fore 

 wings blunt, dull slate-black with a trigonate dull white 

 dorsal blotch followed by a very obscure ocellus. 



Antennae black-brown ; palpi, head and thorax dull slate- 

 brown ; abdomen more glossy, black-brown. Fore wings 

 rather narrow, blunt; the costa flatly arched, ajiex squarely 

 angulated, hind margin neai'ly perpendicular ; gre}— black 

 or slate-black, faintly streaked behind with golden-brown ; 

 on the middle of the dorsal margin is a broad upright dull 

 white blotch, somewhat trigonate in shape, and having a 

 faint cloudy dark dot in the middle of its base ; on the 

 costa are six or seven partially gemmated white dots ; 

 cilia black-brown. Hind wings dark smoky -brown with 

 dull white cilia. Female similar. 



Underside of the fore wings leaden black ; costa dotted 

 with white. Hind wings leaden brown. 



On the winu- in Ma\'. 



