I7t LEPIDOPTERA. 



among the leaves, and readily disturbed by jarring the tree, 

 when it usually darts to the ground, and there shams death, 

 but if touched becomes excessively restless. Like very many 

 other Bombyccs it must not be imprisoned in a pill-box, as it 

 will flutter and beat its wings to pieces. The female some- 

 times flies in the afternoon sunshine for short distances about 

 the oak trees. It appears to be nowhere very common with 

 us, but is found in the New Forest, Woolmer Forest, and 

 other woods in Hants, also in most parts of Sussex, Kent, 

 Berkshire, Oxfordshire, Essex, and Suffolk, wherever there is 

 any extent of oak woods. Abroad it is found in the South of 

 Sweden, widely distributed and rather common in Central 

 and Southern Europe, Livonia, and Bithynia, also in other 

 parts of Asia Minor. 



Genus 2. HETEROGENEA. 



Fore wings broad, rather triangular, unicolorous ; thorax 

 and abdomen slender. 



1. H. asella, ScMff. — Expanse | to | of an inch. Fore 

 wings triangular, shining, unicolorous, yellow-brown or dark 

 brown ; hind wings darker. 



Antennge short, simple in both sexes, thorax small ; 

 abdomen short and rather thick in proportion ; fore wings 

 somewhat triangular, with the costal margin much arched, 

 the apex pointed, the hind margin oblique and rather rounded, 

 and the dorsal margin short and straight. Anteuni^, head, 

 thorax, abdomen, and fore wings, in the male, glossy dark 

 purple-brown or dark liver-brown, without markings but 

 with the tips of the cilia slightly paler ; hind wings still 

 darker brown, with pale brown cilia. In the female the 

 head, body, and forewings are of a rather light ochreous-brown 

 without markings ; the hind wings darker brown, with 

 ochreous-brown cilia. Legs short, brown. 



Under side, in the male, extremely glossy, dark brown, 



