PLEBEIN^. 21 



Plebeius optilete, Papilio optilete, Knoch, Beitr. Ins. i. p. 76, pi. 5, figs. 5, 6 (1781). Central 



Japan, Europe, Siberia, Amurland, Trans-Baikal. 

 Plebeius cleobis, Lycaena cleobis, Bremer, Butt. Acad. Petr. iii. p. 472 (1861). Habitat, Central 



Japan, Corea, Amurland, Bureja Mountains. 

 Plebeius pheretes, Papilio pheretes, Hiibner, Eur. Schmett. i. p. 45 (1865). Habitat, Western China, 



Europe, Turkestan, Amurland, Lapland. 

 Plebeius micrargus, Lyesena micrargus, Butler, Cist. Ent. ii. p. 283 (1873). Habitat, Tokio, Japan. 

 Phebeius chinensis, Lycsena chinensis, Murray, Trans. Ent. Soo. 1874, p. 523, pi. 10, fig. 5 ; Synonym, 



Lycsena mandschuriea, Staudinger, Rom. sur Lep. vi. p. 160 (1892). Habitat, N. China. 

 Plebeius bracteata, Lycsena bracteata, Butler, Proc. Zool. Soc. 1880, p. 407, pi. 39, fig. 4, $. 



Habitat, Kandahar. 

 Plebeius pseudegon, Lycsena pseudegon, Butler, Proc. Zool. Soc. 1881, p. 851. Habitat, Yesso Island, 



Japan. 

 Plebeius ihiriensis, Lycsena iburiensis, Butler, I.e. p. 852. Waterhouse, Aid, pi. 108 (1882). Habitat, 



Yesso Island, Japan. 



Genus POLYOMMATUS. 



Polyommatus, Latreille, Hist. Nat. Crust. Ins. xiv. p. 116(1805); id. Enc. Meth. ix. p. 11 (1819). 



Tutt, Brit. Butt. i. p. 313 (1906). 

 Lycsena, de Niceville (part), Butt, of India, iii. p. 66 (1890). Bingham, Fauna of Brit, India, 



Butt. ii. p. 334 (1907). 

 Hirsutina, Tutt, Brit. Lep. x. p. 154 (1908). Type, damon, Schiff. 

 Agriades, Tutt, I.e. p. 155. Type, coridon, Scop. 



Eyes hairy, coloration, structure and venation much as in Lycsena and Plebeius ; 

 differs from Plebeius in the genitalia, in having a less heavy base to the clasp, a less 

 slender upper portion, and its curvature is simple ; the hard process of the clasp is 

 rather shorter than in Agriades ; in both there is a soft process between the two 

 divisions of the clasp (it often swells out in preparation in a balloon-like way) ; 

 whether we regard it as a part of the soft process of the clasp, or a development of the 

 membrane between the two processes does not much matter, but its considerable 

 development (it occurs elsewhere) is characteristic of these two genera. The hairy eyes 

 of the species of this genus makes it a link between the Plebeince and Lampidince, 



Type, Icarus, Eottenburg. 



POLYOMMATUS SARTOIDES, nov. 

 Plate 645, figs. 1, ^, la, 9,1b, ^. 

 Lycsena sarta, Bingham (nee Alpheraky), Fauna of Brit. India, Butt. ii. p. 345 (1907). 



Imago. — Male. Upperside purple-blue, with some darker blue scaling at the base. 

 Porewing with the costal line finely black, terminal line black, with indications of 

 suffused sub-terminal blackish spots. Hindwing with the costa broadly suffused with 



