Latreille has divided this beautiful genus into those with 

 the hinder wings more or less tailed (viz. Z,. dispa?; Chryseis, Vir- 

 gaurea and Plilceas) ; and the others with the posterior margin 

 entire, comprising the Blues or Argus Butterflies, amounting 

 to 10 British species. 



The splendid species selected to be figured was first dis- 

 covered in Wales, as we are informed by Mr. Haworth in his 

 valuable work " Lepidoptera Britannica^'' by the celebrated 

 botanist Hudson. It has subsequently been captured by Dr. 

 Skrimshire and Mr. H.; and lately in considerable abundance 

 by Messrs. Benjamin* and Joseph Standish, who went down 

 to Whittlesea Meer, Huntingdonshire, in expectation of find- 

 ing it. They inform me that tlie end of July is undoubtedly 

 the right season for this Insect, although they met with it 

 the beginning of August 1822 and -23, flying amongst reeds, 

 about the centre of the Meer near Yaxley ; that it is very 

 active, and in windy weather conceals itself amongst the 

 highest reeds ; upon which the Caterpillar probably feeds, as 

 they found the Butterfly upon that plant just emerged from 

 the chrysalis, drying its wings. I have therefore introduced in 

 the plate a leaf of Arundo Phragmites (Common Reed) : the 

 Insect at rest is the male, that flying the female. 



* Two collectors ; of whom I purchased L. diipar, — and who dispose of all the 

 Insects they take. One lives at 10 Weymoutli-street, New Kent Road; the other 

 at 10 King-street, Old Kent Road, 



