TRIFID.^. 301 



collection of Mr. A. Robinson is very curious ; its colour 

 is pale and the central black markings are absent, but along 

 the hind margin is a row of black bars arising from the sub- 

 marginal black spots, and of these, one arising at the anal 

 angle runs far into the wing. Another pale specimen in the 

 collection of Mr. A. C. Vine, and taken near Shoreham, 

 Sussex, is shaded with yellow and in some degree with 

 red. 



On the wing at the end of June and in July. 



Larva. Head small, shining, pale brown reticulated with 

 darker brown ; body uniformly cylindrical, smooth, velvety- 

 brown, with a median series of somewhat shuttle-shaped 

 pale markings placed end to end and forming an almost 

 continuous strijDe ; there is a slightly paler stripe on each 

 side including the spiracles, which are situated just within 

 its upper margin ; the dorsal area as far as this lateral 

 stripe is variegated or marbled with velvety-black ; the 

 undersurface and claspers are paler. (E. Newman.) 



April and May on narrow-leaved willows, and occasionally 

 upon poplar. Mr. G. T. Porritt says that the very young 

 larvas spin themselves up in the young willow and poplar 

 leaves and there feed. When about half an inch in length 

 they leave this habitation and descend to the foot of the tree, 

 where they hide under bark, or among grass and rubbish on 

 the ground, during the daytime, ascending the tree at dusk 

 to feed on the leaves. This costs them no trouble since this 

 larva is remarkably swift in its movements. The winter is 

 passed in the <d^'g state. 



Pupa rather cylindrical, the abdominal segments, however, 

 tapering rapidly ; eye-covers conspicuous, brilliantly glossy ; 

 limb-covers more dull, abundantly sculptured with cross 

 striae, antenna-covers also conspicuously so ; wing-covers 

 dull and roughened by excessive abundance of incised scuI^d- 

 ture, and with ridges representing all the nervures ; dorsal 

 region, with the dorsal segments, also unusually dull and 



