92 THK Bl'TTERFUKS OF SWITZERLAND 



as in P. C-album, with dk. brn. markings; in the '2nd (and later) broods, vii.- 

 viii. (and ix.), known as 



var. Prorsa, L. : the grd. col. is blk., with wh. broken bands and 

 or. ante-margh lines. An intermediate form, v. scarce in 

 nature, but readily obtained by keeping September chrysalids 

 at an artificial heat during the winter (Far.), is called : 



ab. Porima, (h-hs. ; more nearly resembhng Prnrm, but with wh. 

 replaced by tawny, and the band on h.w. almost always divided. 



Log. V. local ; c. round Basle, e.;/., Liestal (Christ) ; the 

 Bechburg (IL-S.) ; c. in the Bernese Mittelland ; Schiipfen ; Burg- 

 dorf ; Berne (J/f/////) ; throughout Oberaargau ; Lenzburg (TF.s<7(^.) ; 

 Glarus {Heei) ; Kupfernaseruns above Fil/.bach, vi. 19/02 ; Thalalp, 

 vi. 20, Ac. /02 ; [jerana (Fis.) ; v. scarce in the Grisons ; Tavanasa 

 (}3ri'uf(/i'r) : Ragatz [FAsenriiuj) ; also in the Valais, at the ft. of Mt. 

 Chemin ; nr. Sierre, esp. in the Pfynwald {Far.) ; in W. Switz. at 

 Lucens, v. 1/8H {Hutchinson) ; also Moudon and Payerne (Fm/) ; 

 (entirely absent from the Cantons of Schatfhausen, Thurgau, St. 

 Gall, and Ziirich ; also from the Rhone Valley up to Martigny, and 

 from the district bordering on the Lake of Geneva). 



The Tyrol; also Wolfsberg, vii. 15/97; Prorsa {Lmn.); Berchtes- 

 gaden, vi. e. 1900 {Laufi). 



Directions of Yar, (a.) size of the dk. brn. markings in Lcrana. 

 (b.) size and continuity of the wh. band in 



Prorsa. 

 (c.) number and extent of thin or. ante- 

 raarg. lines in Prorsa. 



Genus, Pyrameis, lib. 



Dist. Char, a triple wh. spot from centre of costa, and ante- 

 margl. wh. spots from nr. apex half down f.w. 



P. Cardui, /.. .- ooium. Fd. pit. thistles. 



Dist. Char. gi'd. col. un.s. f.w. cherry col. 



Log. IV) 1)H found everywhere, in many years ab., up to 8000ft.; 

 the principal brood emerges in late summer, but the insect is to be 

 seen on brt. days during most of the year. 



Directions of Yar. (a.) blk. markings confluent up.s. 

 ab. Elymi, Hmhr. .- in which the wh. spots are reduced to small 

 streaks. 



(b.) absence of blk. spots up.s. f.w. except 

 apical half. 

 ab. Inornata, liramson: in which the wh. spots are also larger 

 (both abs. scarce). 



P. Atalanta, L. ; 5r)iiiiii. Fd. pit. nettle. 



Dist. Char. Scarlet band across f.w. and border h.w. up.s. 



