48 



The perfect insect appears about the end of June and 

 the beginning of August. 



The caterpillar is yellowish green, dotted with darker 

 green and reddish, and having a reddish stripe along the 

 back spotted and edged with yellow, the red interrupted 

 on the sixth and seventh segments. 



The date of the appearance of the caterpillar is in 

 August. 



It feeds on the sallow and the willow. 



The chrysalis is found enclosed in a very hard cocoon 

 attached to the bark of the tree whose leaves had formed 

 the food of the larva. 



CERURA BIFIDA. 

 Plate XXXVI. Figure 9. 



Localities for this species are York, Huddersfield, 

 Rotherham, Sutton-on-Derwent, Stockton Forest, Askham 

 Bog and Langwith near York, Brighton, Lewisham, 

 Ashford, Halton, Kingsbury, Manchester, Horndean, 

 Taunton, Sherwood Forest, Carlisle, Preston, Stowmarket, 

 Lower Guiting, Cambridge, Epping, Birkenhead, Bristol, 

 Burton-on-Trent, Wavendon, Hammersmith, and near 

 London. 



The perfect insect appears in June, July, and the begin- 

 ning of August. 



The caterpillar is pale green dotted with brown, with a 

 broad stripe along the back, on the second and third seg- 

 ments, on the latter of which it ends in a point, widening 

 again to the eighth, and then diminishing to the thir- 

 teenth, where it finally again widens. 



