. A history of North American birds [microform] : land birds. Birds; Ornithology; Oiseaux; Ornithologie. 422 NidtTii amkiu(;an nrRDR. 30138. iia dcscrihed; tlio back diirkor, the ruini) and iixillars more pluiiibeoiis, the sides more bluish. Tlicre is little doubt that the e.\aniinati(»u of series from the States alouj,' the Mississi])pi will show a still closer reseiubhmce to typi- cal C. hiiloviriiniiiti, and tiiat the jiradatiou l)etweeu the two extn^iues will be I'uuud to be cimtiiiuous and unbroken. It therefore seems reiisoiiable to con- sider them all as one species, varying with longit
. A history of North American birds [microform] : land birds. Birds; Ornithology; Oiseaux; Ornithologie. 422 NidtTii amkiu(;an nrRDR. 30138. iia dcscrihed; tlio back diirkor, the ruini) and iixillars more pluiiibeoiis, the sides more bluish. Tlicre is little doubt that the e.\aniinati(»u of series from the States alouj,' the Mississi])pi will show a still closer reseiubhmce to typi- cal C. hiiloviriiniiiti, and tiiat the jiradatiou l)etweeu the two extn^iues will be I'uuud to be cimtiiiuous and unbroken. It therefore seems reiisoiiable to con- sider them all as one species, varying with longitude and r, ^aon according to the usual law, — the more western the lighter, with longer tail. The only alternative is to that two species, originally distinct, have hybridized along the lino of junction of their resiiective provinces, as is certainly some- times the case. The in many respects of coloration of the Shrikes of the Pacific coast to those of the South Atlantic States is not with- out its importance in the discussion of the subject. However it may be, it is necessary to retain the name of cixa- hitoroidvs, as representing, whether as species or variety, a peculiar regional form, which must be kept distinctly in mind. The comparatively greatei' size of the bill in the Cape St. Lucas s])eci- mens is seen in other species from this lo(;ality (Xo. 2G,4;i8 of adjacent figure). The intensity of the black front in this species varies considerably, being sometimes very distinct, and again entirely wanting. This may ])robably be a character of the breeding-season, the dulncss of black anterior to the eye and the lighter color of the bill having a close relationship here, as in other species, to maturity, sex, and season. Haiuts. This variety was first described from specimens obtained in the territory of the Hudson's Bay Co. J'ichardson states that it was not found farther north than the fifty-fourth degriie, and there only in the warm and sandy pla
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbirds, booksubjectorn
