144 THE MOTHS OF THE BRITISH ISLES. 



has transferred the group to the Noctuidrt' and separated 6". 

 revayana from the others, placing it in his sub-family Sarro- 

 thripiniu, to which also belong certain Indian species. 



Only four species occur in our islands. Three of these have 

 green fore wings and pale grey or whitish hind wings. The other 

 species, SarrotJiripa revaya?ia, has the fore wings of various 

 shades of grey, brown, or blackish ; its boat-shaped cocoon is 

 very like a small edition of that of HylopJiila bicolorana^ and, 

 although the caterpillar is in some respects not very dissimilar 

 to those of the green-winged species, the moth does not seem 

 quite to be one of their set. 



The Cream-bordered Green Pea {Earias chlorana). 



In size, colour of the fore wings, and general appearance this 

 moth might be mistaken for the much more common Green 

 Tortrix {Tortrix viridana). On examination however, it will 

 be seen to have white hind wings, whilst those of the Tortrix 

 are grey. Again, the head, front of thorax, and front edge of 

 the fore wings are white in the present species (Plate ']^'. 



The caterpillar is green, inclining to whitish on the back, the 

 latter lined with brownish, and bearing warts on rings six and 

 eleven. It feeds in July and August on the terminal leaves of 

 osier and willow ; these leaves are drawn together with silk, 

 and the solid appearance of the foliage at the end of the twig 

 will afford a clue to the probable whereabouts of the caterpillar 

 when one is searching for it. Chrysalis, brown, darker on the 

 back, paler on the under parts, and on the wing covers ; 

 enclosed in a tough boat-shaped cocoon which is often con- 

 structed on the bark of a twig or stem of the food plant. As a 

 rule the moth does not emerge until the following year, but 

 in some years a few will appear in the autunm, and others 

 remain in the chrysalis until the following May or June. 



This species inhabits damp places where there are osiers. 



