AND THK ALl'S OF CENTRAL KUKOPE. 13 



(e.) un.s. shade of 'j;n\. col. 

 (f.) $ , amount of or. up.s. 

 (g.) tendency to develop mai'gl. I'ow of l)lk. 

 spots up.s. h.w. J . 

 (var.) ab. Bella, ll.-S.: with liglitci' un.s. (a transitional form is 

 ab. in the Rhone Valley). 



R. Argyrognomon,! Hifisir. (Ar<j,ii^, umloninn ; •iTiiini. to 



;-!.")mm. Fd. pit. (ri'itista, Mrlilotiis, Lotus, '['riiodiiin, ('idtitr,i, 



iV.c. : hyb. p. 



J lilac-bl.. $ brn. with bl. suffusion over a large portion 



of ws. 

 Dist. Char. 3 narrow well-defined blk. border up.s., ? propor- 

 tionately small eye-spots un.s. 

 Log. More local than the preceding, but still widely distributed, 

 often c, sometimes ab., v.-vi. and vii.-viii. ; in mtns., only vii.-viii. 

 Basle; Liestal (Clnist)\ the .Tura; St. Gall {'irtsridcr) ; Gadmen- 

 thal {lliitzer): Engelberg (/»rt/,ry) : Coire, scarce (rrt///.sr/() ; I'ontre- 

 sina, vii. /Si {Luin.) ; c. throughout the Valais, esp. on the banks of 

 the Khone ; and in the high valleys, <>.(i., in immense numbers at 

 the Ganter bridge, vii. /98, &c. (IIV*.). 



Gen. distributed through the rest of the region. 

 Directions of Yar. (a.) size : largest gen. in hotter Iocs., Sierre, 



Jiranson, and larger still from Mendrisio, viii. 15/02 (/'Vs.). 



$B of 27mm. -2Bmm. are usual where ? Ilninura is found. 



The smallest constitute : 

 var. iEgidion, McUsjirr ; 22mm. -2omm. J with rather darker 



grd. col. up. and un.s., $ gen. with some bl. up.s. 

 Log. Gen. the mtn. form, but not to the exclusion of others, 

 e.KC. the large <? and type 2 , nor is J'](jidion confined (exc. as var.) 

 to the mtns. ; e.//., liranson, with type not uncommonly. At 

 Berisal, vii.-viii., it occurs in innuense pi'ofusion, in about equal 

 numbers with ? Jinimwa and the J of 27mm. (117/.); so also on 

 the Weissenstein (/''/r//). In the upper Engadine it replaces the 

 type {Freij), so also at Thusis, viii. /95 (JY/.s-s b'tn.). 



(b.) ? , bl. extending over whole ws. exc. 

 border. 

 ab. ? Argulus, I'tey : of small size, av. 27mm. 



I Xote. — Staudimjer'sme ot tliis name (Cat., litOl, p. 7H), with the brn. ? as 

 the type, is indefensible. As Dr. Spuier (Die SchmettevUnge Kuiopas, 1902, p. 61 ) 

 has pointed out, Bertintriixiter'x sp. is figured with the bl. ? , and as this is quite a c. 

 form (I sliould say the connnonestj, it is perfectly permissible to regard it as the 

 type. (The case of Ale.ii^ is quite different.) Dr. Spuier suggests the name ab. v 

 Bnmnen for the brn. 5 . The only objection is that the brn. ? is gen. associated 

 with a smaller and slightly darker j , but as this is not invariably the case, I have, 

 after nuich consideration," decided to adopt the suggestion, rather than the only 

 alternative of adding to the already existing confusion by re-naming this sp. In 

 my own judgment it would be immeasurably better to retain the traditional use of 

 the names Argm and .Eijon ; it is probable that Linnieus reganled both as one sp. 



