60 THE BUTTERFLIES Ol' SWITZERLAND 



Dist. Char. un.s. h.w. nervures broadly suffused with greyish-grn. 



Loc. C. everywhere in the plains and alps, and in var, Bri/nnire 

 up to the snow-line, iii. e.-ix. e. 



Directions of Yar. (a.) darkening of the gr. tips and spots up.s. 

 in 2nd brood, known as : 



var. Sabellicse, Stj)Ji. .- ^ has a spot up.s. f.w. ; nervures un.s. 

 much less strongly marked. 



(b.) tendency in 2nd brood to obsolescence of 



markings un.s. h.w., culminating in : 



ab. Napsese, Ei<p. : in wh. they do not extend beyond centre of 



wing, and in extreme cases are represented only by dots at end 



of rays on out. marg. ; gen. larger than type. 



Loc. Occasionally in many places viii.-ix., ejj., Veytaux, ix., e. 

 /{)8(ir//.); Martigny ; Sion ; Sierre ; &c. (I^av.). 



Abries, ab., viii. m. 1900 {Tutt); St. Martin Vesubie ; Cascade de 

 Bor^on (Brut.). 



(c.) tendency in $ to darken up.s. at high 

 elevations, culminating in : 

 var. ? Bryoniae, 0<7/.s. ,• in wh. all the nervures are broadly 

 suffused with dk. scales, wh. sometimes extend over the whole 

 wing, grd. col. varies from It. gr. to yell. 



Loc. Gen. replaces type above 5000ft., vi.-vii., 1 brood only, but 

 also found considerably lower. E. Vaudois Alps, <■.</., Rochers de Naye, 

 vi. b. /Ol, ab., yell. grd. (W/t.): all the alps on S. side of Rhone 

 Valley from Martigny to Simplon (Far.) ; <?.//., Berisal, vii. m. /98, 

 gr. grd. (11 A.); Riffelalp, vii. /Ol (Litui.) ; not e. in Bernese 

 Oberland {Kaiu) ; Gemmi, rare ; but Loeche-les-bains, c. {Fcu\) ; 

 JNIiirren, viii. b. 1900 (K/;.); Weissenburg (/J//.) ; Triibsee Alp 

 {Kane) ; c. on the Jura, descending as low as Tramelan, about 

 3000ft ; Glarus, cfi., Pantenbrucke, vi. 20/02 (Fis.) ; Maloja, vi. e. 

 /95, V. fresh (Miss Ftn.), ttc, &c. 



Piedmont; Savoie ; Jiasses Alps; e.;/., Faillefeu, Larche, 

 Godessart, itc. (h'anr): St. Martin Vesubie; Cascade do Boreon 

 {Brill.): Trafoi, vii. 15, 1900, nearly over (/('.-/'';>/.) ; Mendelpass, 

 vii. e. /95 {Tutt) ; Heiligenblut, vii. e. /97 {Lniu.). 



(d.) un.s. h.w., grd. col. and markings vary 

 extremely ; with us the spring brood 

 IS far brighter and more distinctly 

 marked un.s. 

 (e.) tendency of grd. col. to become yell., 

 culminating in : 

 ab. Sulphurea, Sriioijen : wh. has alj ws. of a clear sulphur col. 

 Loc. The .Tura {Aij.). 



Genus, Pontia, Fabr. 



Prevailing col. wh. with blk. at apex. 



