400 i.i-:i'ii)nrTi-:i<\. 



Underside of llie tore \vini;s sliiiiiiii,' liu'lit ^re\ ; discal 

 spot black but small; lieyond the middle is a {jjrey-wliite 

 strij)p edtred inside at the costa with lilack ; cilia dotted with 

 black. Hind wings irreyisli-wliite ; central spot black; 

 beyond it is ;i slender j,^rey transvers.- tlii'cad. followed by a 

 broader ijrey stripe: cilia spotted with <rrey. Body and lejjrs 

 j^reyish-white : taisi in front black-brown. 



Hardly varialjle. lint tlic central band is a little nioi'e 

 distinct in some specimens than in others. 



On the winf^ iu -May and .limr. and as a partial .-econd 

 generation in the later half of -Inly and in .Viigust. 



JjAI{V.\. riie head is ratiier narrower than the body and 

 distinctly divided into two rounded lobes on the crown ; 

 body uniformly cylindrical, without excrescences, but a good 

 deal wrinkled : the thirteenth serrinent terminatinsi' in two 

 divaricating jioints directed liackwards; colour of tiie head 

 oi)aque yellow-green ; of the body a))])le-green, with three 

 indistinct whitish stripes down the back'; the tips of the 

 anal points are ])ink. It rests in a nearly straight posture. 

 generally stretched at full length on the midrib of the leaf 

 of its food-plant, the head being tucked in and the mouth 

 concealed between the first pair of legs. (I"]. Newman.) 

 Mr. IJuckler's figures show in some specimens dorsal and 

 spiracular white stripes, in others narrower dorsal, subdorsal, 

 and spiracular white lines. 



.\ugust and Septendier. on ><ii\ii- raprna, and other species 

 of sallow. 



I'l r.\ very thick, almost ovate, but the head and eye-covers 

 pronunent, greenish-brown; wing-covers thickened, smooth, 

 and glossy, antenna-cases just ncjticeable, sculptured in tiny 

 squares, all this surface shining pale olive-green; dorsal 

 region and abdominal segments dark chestnut, covered with 

 minute punctures except the smooth hind band, which is 

 ridged : cremaster strong, somewhat triangular but with 

 projecting jjoints at the sides; apex continued into a strong 



