THE GRASS EMERALD. lOl 



GEOMETRIN^. 



The Rest Harrow {Aplasia ononaria). 



This greyish-brown moth has two darker, sometimes 

 reddish, cross lines on the fore wings, and one such line on 

 the hind wings. It is presumably only to be regarded as an 

 accidental visitor to England. The first record was of a 

 specimen captured in the Warren at Folkestone in July, 1866, 

 and since that year others were obtained in the same locality, 

 but apparently not more than about half a dozen altogether. 

 None seems to have been recorded for over thirty-five years. 

 The specimen, whose portrait is shown on Plate 38, Fig. 3, was 

 obtained from Dresden. 



Abroad, the range includes Central and Southern Europe 

 Asia Minor, Syria, and Armenia. 



The Grass Emerald {Pseudoterpna pruinata). 



When freshly emerged from the chrysalis, the species 

 represented by Figs. 6 to 8 on Plate 38 is of a beautiful 

 blue-green colour, but in course of time a greyish shade 

 creeps over the wings. The dark cross lines vary in intensity ; 

 in some specimens well defined and blackish, in others very 

 faint, and hardly discernible ; occasionally, the space between 

 the lines on the fore wings is dark shaded ; the whitish sub- 

 marginal line is not always present. This species is the 

 cyihisaria of Schiffermiller, and the cytisaria of other authors. 



The caterpillar (figured on Plate 41, Fig. i, from a coloured 

 drawing by Mr. A. Sich) is green, with three lines along the back, 

 the central one dark green, the others whitish ; a pinkish stripe 

 low down along the sides, the points on the head and the first 

 and last rings of the body are often pink also. It feeds on 

 pettywhin {Genista anglicd)^ also on broom {Cytisus scoparius) 



