MIGRATIONS OF PAPILIONACEOUS INSECTS. 179 



however, from the present subject, to treat on the 

 wonderful irregularity of insect appearance ; some 

 curious facts concerning this I will reserve for a 

 future opportunity ; but it is nevertheless worthy 

 of being observed here, that the Painted Lady 

 Butterfly, which is remarkable, in most places, for 

 the extreme irregularity of its occurrence, is equally 

 remarkable in others, (as in some parts of the west 

 of England, and in Jersey,) for appearing with 

 great regularity. 



t( A very singular circumstance is also related of 

 the Cynthia, Cardui, by Mr Knapp, in his amusing 

 and excellent f Journal of a Naturalist.' After 

 some other remarks on the species, he observes that 

 some years ago a quantity of earth was raised in 

 cutting a canal in this county (Gloucestershire;) 

 and in the ensuing summer, on the herbage that 

 sprang up from the new soil on the bank, this but- 

 terfly was found in abundance, where it had not 

 >een observed for many years before.' Might we 

 not reasonably expect, if the soil about Hamp- 

 stead were to be turned up, on any occasion, to 

 some depth and extent, that the extraordinary and 

 distinctly marked butterfly, Cynthia Hampstedien- 

 sis, would reappear, although so many/years have 

 now elapsed since it was last seen ?" * 



* Field Naturalises Magazine, p. 469. 



