156 Lloyd's natural hlstory. 



This species is a native of Europe and Western Asia. 



It expands nearly two inches. 



The thorax and fore-wings are deep grass-green, the latter 

 being crossed by two oblique whitish lines. The hind-wings 

 and abdomen are glossy white. The palpi, antennae, and legs 

 are tinged with red. 



The larva is green, with a lateral yellowish line and a dorsal 

 tubercle on the second segment. It frequents various trees, 

 but seems most partial to the oak. The pupa is pale green, 

 with a black dorsal line. The Moth appears about the middle 

 of June, and is much scarcer in Britain than the last species. 



FAMILY XV. LITHOSIID^. 



Eggs. — Usually resembling round pearly beads. 



Larva. — Cylindrical, with sixteen legs, clothed with short or 

 moderately long hair, arranged in tufts ; gregarious, and often 

 feeding on lichens. 



Pupa. — Enclosed in a cocoon. 



Imago. — Allied to the ArciiidcE, but the ocelli are gener- 

 ally absent; the fore-wings are long and narrow; and the 

 hind-wings rounded. The neuration is usually simple, and the 

 colours seldom much varied. Most of the species fly in the 

 evening, but some of the more brightly-coloured species by 

 day. When the former are beaten out by day they simulate 

 death in the net. 



The LithosiidcE are a very extensive Family, with ciliated or 

 slightly pectinated antennae, slender bodies and large wings ; 

 in most cases the fore-wings are much narrower than the hind- 

 wings, and overlap above them when at rest. The fore-wings 

 are rounded at the tips, and the hind-wings are rounded. 

 The species are generally simply coloured, being white or 



