rections in his Illustrations ; and that he has not noticed the 

 source from whence he derived his information is of little con- 

 sequence. 



The insect before us he has retained in his genus Margaritia, 

 which Hlibner has divided into no less than 16 genera, to 

 which Mr. Stephens has added another. I only notice this 

 to show the absolute folly of adopting such arrangements 

 founded merely on markings of the wings, &c. I admit that 

 where these indicate a difference of structure either in the an- 

 tennae, legs, or trophi, they may be kept in view, and prove 

 useful, but unsupported by such characters they are puerile 

 distinctions, and will never, it is to be hoped, be admitted to 

 overload science with useless names, by those who write to 

 elucidate the study of natural history. 



The only specimen I have seen of N. ciUalis came into my 

 possession when I purchased the valuable collections of the 

 late Mr. Edward Blunt. It was taken many years since, in the 

 month of June, in the neighbourhood of Cambridge, by his 

 brother, the Rev. W. Blunt. 



From a careful examination of this insect, it proves to be so 

 different to any of the genera before illustrated in this work, 

 and others of which I have any knowledge, that it ought not to 

 be included in any of them, for whilst its general habit is sin- 

 gularly intermediate between Scopula and Crambus, the short- 

 ness of its maxillae at once distinguishes it from both those 

 genera. 



The Plant is Iris Pseudacorus (Water Flag). 



