THE GRASS EMERALD. lOI 



GEOMETRIN.^. ^ f I Q "^ 



The Rest Harrow {Aplasta ononaria). 



This greyish-brown moth has two darker, sometimes 

 reddish, cross Hues on the fore wings, and one such hne 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 {Psetidoterptia 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 

 cythisaria 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 anglica), also on broom {Cytisus scopariiis) 



