. Bulletin of the British Ornithologists' Club. 1961 23 Vol. 81 the writer inappropriate in that the subjects concerned are yi///juveniles and that Stresemann's "Fortsschritskleid", Mayr's "Progressive" plumage, refer to birds which have passed the post-juvenile moult and might therefore even be breeding birds; in fact Mayr {loc. cit.) comments "such plumages may also occur in adult birds: namely, "retarded" plumages in adult males and "progressive" plumages in adult females". Therefore in the use of the above terms the operative condition is t
. Bulletin of the British Ornithologists' Club. 1961 23 Vol. 81 the writer inappropriate in that the subjects concerned are yi///juveniles and that Stresemann's "Fortsschritskleid", Mayr's "Progressive" plumage, refer to birds which have passed the post-juvenile moult and might therefore even be breeding birds; in fact Mayr {loc. cit.) comments "such plumages may also occur in adult birds: namely, "retarded" plumages in adult males and "progressive" plumages in adult females". Therefore in the use of the above terms the operative condition is the implied breeding of the individual. The dusky throat patch in P. domesticus juveniles while affording a clue to the sex of the individual is, in the writer's opinion, of far greater significance as a phylogenetic expression for the reasons already advanced {vide supra).. Plate vir PLATE VII. Overlap of characters in females ot Passer domesticus ihmesticus (Linnaeus) and Passer hispaniolensis hispaniolensis Temminck. A. B. and D. Passer hispaniolensis hispaniolensis Temminck, Thrace. Collection of James M. Harrison. C. Passer hispaniolensis hispaniolensis Temminck, Malta. Collection W. H. Payn. E, Passer domesticus domesticus (Linnaeus). Breeding adult British Isles. Collection James M. Harrison. F. Passer domesticus domesticus (Linnaeus). Full juvenile female showing dusky throat patch and "ghost" hispaniolensis pattern of breast and flanks, British Isles. Collection James M. Harrison. VII. SUMMARY This paper describes certain plumages in the House-Sparrow. Passer domestieus (Linnaeus) and relates these phylogenetically to the Spanish Sparrow, Passer hispaniolensis (Temminck). The implications drawn from the study of certain races and intersexes. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original B
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