G\ 



GEOailAlMlICAl, DISriniUl'PioN. 



TIu^ portion ol' llui Nonli AiiMMiciiii coiiiiiiciit, wliicli \]\i\ birds (tflliis 

 ^•(Miiis inlinlMl <lmiii.!4' MuOjiocdiiiiL;' scnsoii lies cliiclly (<> llio noidiwnid of 

 tilio HiiitiHl S(:i((^N :iti(l wcsl oC (lur AMiiiilic. (li;iin:ij;(^or r>rilJsli A iii(M-i(i;i. 

 Jn Mh"! lliiitc*! Stnics, I1m\v ;l^<^ liiiiilcd to llni cIcAiitrd iiioiiiitiiin rjui^cs 

 :iM(i plnlciiiix oI'Mio \V(\sl(>ni iKCi^ioii ; o\h\ ov two tA\HM-\o» (I ^.(nistra I is :uid 

 j>ossihly Jj. ainilci) iidiiibitiii^' MM^ ;d|>iiio Mniniiii(,.s diii'iii^' siimiiicr, ;um1 

 hII hill. oiuw»r tliciii {\",\\: (jriseiHKclia) lollowiiiji' Wh) b!i.s«^H of Mio iiioiiiil- 

 !iiM-i';in<;(^s soiiMiWiiid in tlicir \vin(or-ini^ra(ion,s. 'IMM^ (^xl,<Mit, of Mu^ir 

 sontli\v;ird iiii;;riilion is not known ; bn(, iVorn the i'iw.i, Mint/ Muiy m'<' •^>^'- 

 ocsNiv(ily iibnii<l;inli in porlionHof (loloradc*, wliiln oll(^ Hpcx'ins {aiislrdiiN) 

 Ijiis been oblaincdcvdn in Ncnv Mexico, i( is possibles llial,llM\\' extend tlieir 

 mij^rat ions HontJiward to llu^ limit (»!' arctic, winter cliniate on tin^ hifj;li 

 nionntain-snninuts. 



Tlie alpine snniniitsol' ('olorado appear to b(^ the sontlnMii liniitd.o 

 tlieii- sninrnei'-distribiit i(»n ; lint, lle^(^ tliey a^^^ restricicMl ai t-liis season to 

 an alt itnde of 1L',(I(M) t'eet and npw aid. 1 n t In^ sann'. count ly, the i(\sid(int, 

 species ( /a <nf,s7;vf//.s) niij^'ralcs (illicitly to tin'* l>alS(^ of the inonidiiins, oi" 

 sibont. .">,00() to (!,(K)() leet lowtn'. In tin' main Itoeky Monntain chain, ad 

 the mijiralory forms [L.tcpkrocotis var. (cjikfocotls ainl var. Utloyails^ L. 

 «lr(il((, and Jj. (tuslnilis) occnr together dniin^" the wint>er-Hea,son, even 

 minii^lin}^ in the samcs tlock ! L. h'/throcolis (proper) <;ome,s from diriM't-ly 

 ninthwaid; var. ////o>7f//.s' from tlicHioitiiwest, and I j. au.stnUis imm the 

 snmmitH of the peaks. Itds nnceitain whence /y. ^t//vf/f6 (!om«vs, biity its 

 bre(ulin};-;j;i'oniHl is probably tlni hi<i;ii monntain.s t.oward the northein 

 border of th(^ United Slates. These tbrms ai'(^mix<'d in winter piobaJdy 

 tJii'on^hoiit- the K'ocky iMonnlain system, siiM*,<i var. Ifphrocolis has been 

 ((btained (in IMarch) at Salt, Lake C'ity on the \ery verj^e of tlni desert 

 basin; while Ij. atidUt has been obtained (in Septx^mber) on the IlintaJi 

 Monntains just U) the easlwai*!. Westward of the eastern bender of the- 

 (Ireat I5asin, it is piobable that/ \ai'. litloralis very hii/^'ely predominai<'S, 

 or thati it entiri^ly icplaces the othei- Ibirns. 'V\\{\ sonllMirnmost hx^dity 

 in the Sierra Nevada, at whi(^h the latter tbrm has been S(M',n in winteids 

 tlu^ vicinity of Lake 'I'aiioe, in the VVasiioe Spur, laiitnde abonl, .»'.)' ' north. 

 At that, place Uu'X were said to hav<', been abnndant<lnrinj;- the cold win 

 ter of 1 St) I -'Oli ; and u specinuMi i'roni there came iid-o tlni possc^ssion of 

 Mr. l\ (Jrnber, of Sa,n I^'raricisco, )>y whom it was present,ed to the (Jei'- 

 man Aca,demy of Natnral Scii^nces in that, city (se(i Oinitholoj^y of ()a,li- 

 foi'nia, I, 1870, ]). l()l). At Viij^inia. ( 'ity, Nevada, otdy a> few miles to 

 the eastwaid, a, larjue tIo(;k was seen by the writ(U' in .lannary, ISdS, 

 llntteiin^' over the snow in the outskirts of the town, ]»recisely aftei' the 

 ma,niM'i' (►!■ Lon^jfspnrs {PIcclfojilmiKs l<(i>i)<niicii.s). It is not a.bsolntely 

 ce.itain that, these birds were vai\ lillorHlis^ as none wei'c, seen red ; t,hey 

 wer<', however, all ^ray-lMsided birds. The liake Tahoe specimen may 

 possibly also have been var. Icplirocotis, bnt, the <;<'oj;raphica,l location of 

 the conntiy is moie in favor of its l»ein^' the, otlnu* (brm.* 



*A coUoction of thoRpi binls recently rfie«iv««l from Captain Botifliro, ohtainod at Oamp 

 llaiiKiy, ((astern Oii'irdii, coinpriHiMl iiiiK^ HpcH'iiiinii,'^, of vvliicli all Imt orid Wdi'o lypicral l.il- 

 londU; tlio .siiiiijld Hpni-imnn hnitiii' of l-lin " ciiiniHulrlH" Kt,yl(i. l''oiir HpociiimiiH homI, hy (Jap- 

 tain JJondin!, IVom tlio .sauKi p!a('.<!, to tlin UoHton So<',ii'ty df Natinal IliHtory, wm'n all tnin Lit- 

 loralis. .Six HpcciiiK^nH loccivcui nt tlid National Mn.sciiiii IVtiin V\\\\, SainnliTM, Wyoniinff 

 Torritory, collccU'd by Dr. A. (J. I'.iuckctt, iiicliKlcil iJircn of //Y^)r«,//.s and tlm .sunir nuird)i'i- 

 of Uplirocotls, 



