88 LLOYD'S NATURAL HISTORY. 



the Silver-Studded Blue. Thus restricted, it includes varioug 

 Butterflies, blue in the male, and brown in the female, with 

 rounded hind-wings, not tailed, on the under surface of which 

 the sub-marginal spots bear distinctly metallic markings. 



THE SILVER-STUDDED BLUE. PLEBEIUS ARGUS. 



(Plate XL VL Figs, 4, 5.) 

 Papilio argus, Linnceus, Syst. Nat. (ed. x.) i. p. 483, no. 152 



(1758); id. Faun. Suec. p. 283 (1761); Lewin, Ins. Brit. 



i. p. 82, pi. 39, figs. 5-7 (1795). 

 Polyommatus agon, Godart, Enc. Meth. ix. p. 685, no. 213 



(1823) Kirby, Eur. Butterflies and Moths, p. 32 (1879); 



Barrett, Lepid. Brit. Isl. i. p 89, pi. u, figs, i, \a-c 



(1892) ; Buck'er, Larvae of Brit. Butterflies and Moths, 



i. p. 112, pi. 15, fig. 3 (1886). 

 Papilio cegon> Denis & Schiffermiiller, Syst- Verz. Schmett 



Wien. p. 185, no. 15 (1775); Hiibner, Europ. Schmett. 



i. figs. 313-3*5 (1803?). 

 Polyommatus argus, Stephens, 111. Brit. Ent. Haust i. p. 93 



(1828). 

 Lycana argus, Wallengren, Lepid. Scand. Rhop. p. 206, no. 2 



(1853). 



Lycana cegon, Newman, Brit. Butterflies, p. 119 (1881), Lang, 

 Butterflies Eur. p. 103, pi. 23, fig. i (1882), 



The Silver-Studded Blue is common throughout the greater 

 part of Europe and the Mediterranean Region, as well as in 

 Northern and Western Asia ; and allied species are met with 

 in various parts of Asia and North America. It is common 

 and widely distributed in England, but appears to be scarce 

 and local in Scotland and in the north of Ireland. It fre- 

 quents heaths and meadows, and I have often seen it asleep 

 in the evening, clinging to heath, rushes, or grass-stems. 



