286 LEPIDOPTERA. 



Strongly arched; apex bluntly angulated ; hind margin 

 oblique and very slightly curved ; dorsal margin a little filled 

 out and softly ciliated ; colour pea-green ; first line white, 

 so curved as to reach the dorsal margin not far from the 

 base of the wing ; second line also white, oblique, and much 

 straighter, almost parallel with the 'hind margin ; extreme 

 edge of costa white ; no trace of other markings ; cilia green, 

 tipped with white. Hind wings rather elongated; apical 

 portion of the hind margin much rounded, and its middle 

 portion bluntly angulated ; ^anal angle squared ; of nearly 

 the same shade of green as the fore wings, but a little whiter 

 toward the base ; beyond the middle is a slender, slightly 

 curved, or bent, white transverse line ; cilia green, tipped 

 with white. Under a strong lens all the green surface 

 appears to be minutely frosted, from shining white atoms 

 placed in transverse rows. Female extremely similar, but 

 rather larger, stouter, and having simple antenna?. 



Undersides of all the wings paler green, shading off to 

 whitish-green on the dorsal margins of the fore wings, and 

 the basal portion of the hind ; the white transverse line 

 faintly visible. Body green, legs to the knees also green ; 

 tarsi pale reddish-brown. 



Not variable, but the colour is fugitive, changing to dirty 

 yellow or yellowish-white under the influence of the slightest 

 moisture or of almost any chemical preservative. 



On the wing in July and the beginning of August. 



Larva rigid ; moderately stout, but tapering a little to 

 the head, which is deeply divided, the two lobes project- 

 ing forward into points, purple-brown ; face flat, rather de- 

 pressed, and when at rest placed close to the legs, which are 

 drawn together ; colour of the body pale green, roughened 

 or shagreened, every tip of the minute roughnesses white ; 

 the second segment purple-brown, produced into two points 

 which extend beyond the head ; sometimes there is also a 

 purple-red dorsal line ; or the dorsal line is deeper green, and 



