256 BRITISH BUTTERFLIES AND MOTHS 



The expansion of the wings is about f inch. The 

 fore-wings are pale green, with the costal edge sulphur- 

 coloured ; the hind-wings are grey. 



The larva is green, posteriorly yellowish -green, with 

 the head brownish ; the spots are small and black ; it 

 feeds on oak, hornbeam, etc., in May and June ; some- 

 times it occurs in such quantities that the trees in an 

 oak wood will be stripped of their leaves, and present 

 a bare appearance just when Midsummer is at hand. 



The perfect insect appears towards the end of June 

 and in July ; we may generally dislodge a small shower 

 of these pretty green moths by tapping smartly the end 

 of an oak bough with the beating-stick at that period 

 of the year. 



FAMILY II. PLICATE. 

 NOTOCELIA UDMANNIAhA. 



(Plate XIV., Fig. 3.) 



This rather conspicuous species seems pretty gene- 

 rally distributed throughout the country, and tolerably 

 common ; in Ireland it has been noticed in the neigh- 

 bourhood of Dublin. 



The expansion of the wings is nearly J inch. The 

 fore-wings are pale grey, with a large dark grey patch 

 occupying the entire basal portion of the wing, extend- 

 ing along the costa to beyond the middle, and there is 

 a small dark grey patch along the hind margin towards 

 the costa ; the most conspicuous mark is, however, a 

 triangular chocolate-coloured spot on the inner margin 

 towards the anal angle, neatly outlined with whitish ; 

 in the extreme apex of the wing is a smaller and far less 

 distinct chocolate-coloured spot. 



