( xiii ) 



In 1853, Wallengren (apparently only knowing one species 

 our British one) said it was Linn6's argus. Afterwards, know- 

 ing both, he maintained our British insect as argus. 



In 1871, Kirby in his "Synonymic Catalogue" called our 

 species argus. 



In 1882, Schoyen wrote a critical review {^Ent. Tids., iii, 

 pp. 34, 100), concluding that the Linnean argus was our aegon. 



In 1901, Staudinger followed the conclusion of the Scan- 

 dinavians, and since then every one has followed Staudingei". 



On the descriptions we should have followed Schiffermiiller. 



On the fact that there are still in the Linnean collection at 

 Burlington House, besides four examples of aegon labelled as 

 English in Smith's handwriting and one without any label, 

 two specimens, a $ labelled " 1074," the " Faun. Suec." number 

 of Linne's argus, and a $ labelled " 1075, idas," the Faun. Suec. 

 number of Linne's idas — -we are inclined to agree with the 

 advisability, now that the change has become effective, of 

 maintaining argus for our aegon, and argyrognomon for the 

 continental insect so long known as argus. 



Mr. Tdtt next drew attention to the remarkable distribution 

 and local races of our British Plebeius argus {aegon), pointing 

 out that in Britain we have three distinct forms, a chalk-hill, 

 a heath, and a moss or moorland form. On the continent, 

 in Northern (except the far north) and Central Europe the 

 type occurred as the form of the plains. In the high Alps 

 philonomiis, Brgstr. ( = aegidion, Meissner), was the racial form ; 

 aegiades, Gerh., occurred in Central Europe on the heath land ; 

 the var. Corsica, Bellier, was confined to Corsica, and further 

 east in Asia Minor the form orientalis, with its ab. bella, 

 H.-Sch. From west to east of the Palaearctic region the chief 

 racial forms of argus were distributed as follows : — 



fpyrenaica, Tutt. \ 

 Pyrenean . U.^pochionoides, Tntt.F'^''''^ ^y^^^""^^'- 



'hypochiona, Ramb. — white underside. 



bejarensis, Chpmn. 

 Spanish . . - casaicus, Chpmn. 



hranuelasensis, Tutt. 



joigensis, Tutt. 



