20 



with a tinge of red on the margins, the tip broadly edged 

 with fulvous red, the centre bar black. The hind wings 

 have the fringe blackish. The body is black, crossed by 

 a broad deep fulvous red ring; the head and thorax are 

 also black; the tail-tuft black, with a few minute white 

 lines. 



Localities for this species are Battersea, Chelsea, and 

 other places near London; Grooby near Leicester, 

 Epping, Cambridge, and, I believe, Birmingham. It is 

 also said that Nicholas Aylworth Vigors, Esq., M.P., 

 obtained it in Ireland. 



The situations where it is to be looked for are osier 

 and willow beds. 



The dates of the appearance of the perfect insect are 

 in June, July, and August; the latter part of the first- 

 named month, and the earlier part of the last. July 5. 



The caterpillar is dull whitish, with brownish spots 

 on the second segment, the head of the latter colour. 



The date of the appearance of the caterpillar is in 

 April and also in May. 



It feeds on the stems and shoots of different species 

 of willow. 



SES1A CHEYSIDIFOHMI8. 



Plate V. Ft'ynre 8. 



THIS very rare British insect measures about ten lines 

 across. Male: front wings transparent, black on the upper 

 edge and the outer edge; the bar, which extends half-way 

 across the wing, also black, the tip broadly ended with 

 pale orange-red; the lower edge reddish orange. Hind 

 wings black 011 the edge, as is the fringe. The body 

 is black, two of the segments edged on their upper side 



