. The introduction and spread of Pieris rapae in North America, 1860-1885 [ 1886] [microform]. Butterflies; Cabbage; Papillons; Chou. OF PIERIS RAPAE IN NORTH AMERICA. 67 it up and its ic ()i)inion of Amei'ica, or knows how 1. It is well 1st are more Itocky Mts.; rapae, they ^. rapae ex- Lumtschatka allied to P. ned that all () the Euro- â¢atalogne he parates as a 1 yiven birth express my s been de- ^, >as no spots reion. The laving beei» uund along Lat. 52»N. It is, how- [â al onteoine lese speeies s. It mat- y undonbt- rujme and , then the a, were dis- f them, and apae is u
. The introduction and spread of Pieris rapae in North America, 1860-1885 [ 1886] [microform]. Butterflies; Cabbage; Papillons; Chou. OF PIERIS RAPAE IN NORTH AMERICA. 67 it up and its ic ()i)inion of Amei'ica, or knows how 1. It is well 1st are more Itocky Mts.; rapae, they ^. rapae ex- Lumtschatka allied to P. ned that all () the Euro- â¢atalogne he parates as a 1 yiven birth express my s been de- ^, >as no spots reion. The laving beei» uund along Lat. 52»N. It is, how- [â al onteoine lese speeies s. It mat- y undonbt- rujme and , then the a, were dis- f them, and apae is un- â ^0 at Great lingly cov- ered ihe area upon tlie map over whieh P. rmosa is known to extend with close cross rul- ing, and that which i( may |)r()l)ably als(» occupy with more open ruling. It will thcieby be seen that the introduced /*. ra/xit- is rapidly progrt'ssing t')ward its near of kin. It may well he believed that if J*, rnjit/t' has in the last five years crossed ihe high plains of Kansas and Nebraska on its westwai'd march, as it has done, the butterfly considered by Mr. AV. II. Etlwards and others as Pliris rn/xic, which has been on the Pacific coast since lS~)i), would, in rnoi-e than a quailer of a century, if it were /\ rapiif, certainly have extended eastwai-(l across the less ai'id country along the northern boundary of the United States to a ])!'(tj)i)rti()nal)ly longer distance.âwhich it certainly has not done. It there- fore fail-* in one characteristic of that ravenous and di'stiau'tive si)ecies. It should be added that the oidy I'orms eonsidei-ed by any one as identical with P. mpae are those descriln'd by myself as P. iiHu-f/iiid/is and by Mr. Rcakirt as /*. >/ri'kf(. They came from California, Oregon and AVashington Territory. AVith regard to the nature of the documentary evidence a few words may be said. One would expect tliat inneh might be learned from agricultural and horticultural jour- nals abont the movements of the butterlly. l)U
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbutterf, bookyear1887
