58 THE BUTTERFLIES OE SWITZERLAND 



Fam. PIERID^. 

 Tribe Aporiidi. 



Genus, Aporia, Hl>. 

 Prevailing col. \\h. 



A. Crataegi, /.. ; (35mm. Fd. pit. liavvthoiii, fruit trees, 



and at higher altitudes I'mmis /lathis and Cotonca-'^tcr {lutv.) : 

 hyb. 1. 

 5> with cl. area f.w. almost transparent. 

 Dist. Char. Nervures of all ws. strongly marked in hlk., In-owner 

 in 2 ' 



Loc \\'idely distributed and gen. ab. over the whole district ; in 

 the Alps up to 6000ft. or more ; v., vi., vii., viii. according to altitude, 

 >'.;/., I)e\, V. b. /97 ; Martigny, vi. 4/02; Berisal, vii. b. 01 (HA.) ; 

 Zinal, vii, 81/9iS ; Rochers de Nave, viii. 4,9G, v. fine and fresh ; 

 Ferpecle, viii. 14/96 {IL-llni.). 



Directions of Yar. (a.) increase of blk. markings. 



ab. Suffusa, I'utt : with blk. suffusion on out. mai-g. forming tri- 

 angular patches. 



ab. Marginata, Tntt : further increased to form broad dk. border 

 (v. rare). 



ab. Lunulata, 'latt : with a marked thickening of disc, lunule h.w. 

 (b.) col. un.s. 



ab. Melaina, Jatt .- un.s. h.w. with a thick dusting of blk. scales 

 between the nervures. 



ab. ? Flava, Tntt: un.s. h.w. yell. ; not uncommon in fresh (esp. 

 bred) specimens. 

 [Obs. — The ab. Alepicu, Cosmovici, " grey, transparent, completely without 



scales," I think we can all make with judiciously rough handling; it is doubtless 



not uucoinmon in nature towards the end of the season.] 



Tribe Piekidi, hyb. 1. 



Genus, Pieris, SclmDiL 



Prevailing col. wh., apex f.w. more or less blk. 

 Dist. Char. un.s. h.w. without markings, or only along the 

 nervures. 



P. Brassicae, L. : (JOmm. Vd. pit. vurious Cnicii'c.nr. 



S without, 5 with, blk. spots, up.s. f.w. 



Dist. Char, large size, without markings un.s. li.w. 



Loc. Everywhere in the plains and up to 4n00ft., in 2 brood?, 

 iv.-vi., and vii. -viii. ; above that height one brood only, vii. -viii. My 

 earliest date is Veytaux, iv. 5/99. The greatest heights I find 

 recorded are Riiielberg, 84.S0ft. and Fuorcla di Hnrlej, 9055ft. 



