LA RENTID.E—E i 'PIS TERIA . 209 



On the wing in June and the early part of -Tuly. 



Larva slender; head as broa<l as tlie second segment, 

 globular and sli^-htly notched on the crown, glaucous-green 

 with a large Ijlack ocellus on the upper part of each lobe: 

 mandibles brown ; body cylindrical and of nearly uniform 

 width throughout ; each segment is plump in the middle, 

 which makes the divisions distinct ; skin clothed with a few 

 short scattered hairs; colour bright green ; a broad velvety- 

 lilack band extends throughout the dorsal area, and is inter- 

 sected by a pale, indistinct, greenish-yellow dorsal line ; it is 

 also edged on each side by a clear ^'ellow stripe, and is 

 divided into black squares by clear yellow segmental divisions ; 

 these black squares vary in intensity in different specimens, 

 in some only occupying the front portion of the segment, the 

 other half being of the ground colour ; all have a mark of the 

 ground colour, varying in size, on the posterior part of each 

 segment ; sides minutely dotted with grey, and thei'e is a 

 very indistinct yellowish line along the spiracular region ; 

 ventral surface, legs, and prolegs green, of a darker shade 

 than the dorsal ground colour. When young the conspicuous 

 dorsal black band is absent. Shortly before spinning up the 

 colour entirely changes, becoming dark green with a jnirple 

 tinge, and the segmental divisions purple. (G. T. I'orritt.) 



July and August ; on alder. Hofmann says also on low 

 bushes of birch, but I feel certain that it is Bot so with us ; 

 also that it occurs in two generations — which I think is never 

 the case here. 



Pupa extremely short and stumpy, very broad across the 

 middle ; abdomen suddenly and rapidly tapering ; head and 

 eye-covers much protruded forward ; antenna-cases con- 

 spicuous, barred throughout at the joints ; the whole of 

 the covers of the wings and front organs olive-green minutely 

 l)ut abundantly sculptured with fine incised lines ; back of 

 the wing-covers much thickened, so that the dorsal region is 

 ■depressed, and its segments, which are chestnut-coloured, 



VOL. VIII. o 



