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This is the final version. Available on open access from Wiley via the DOI in this record ; We will not be archiving data because this manuscript does not use data. ; In mimicry systems, receivers discriminate between the stimuli of models and mimics. Weber's Law of proportional processing states that receiver discrimination is based on proportional, not absolute, differences between stimuli. Weber's Law operates in a variety of taxa and modalities, yet it has largely been ignored in the context of mimicry, despite its potential relevance to whether receivers can discriminate models from mimics. Specifically, Weber's Law implies that for a given difference in stimulus magnitude between a model and mimic, as stimulus magnitudes increase, the mimic will be less discriminable from their model. This implies that mimics should benefit when stimulus magnitudes are high, and that high stimulus magnitudes will reduce selection for mimetic fidelity. Whether models benefit from high stimulus magnitudes depends on whether mimicry is honest or deceptive. We present four testable predictions about evolutionary trajectories of models and mimics based on this logic. We then provide a framework for testing whether receiver discrimination adheres to Weber's Law and illustrate it using coevolutionary examples and case studies from avian brood parasitism. We conclude that, when studying mimicry systems, researchers should consider whether receiver perception conforms to Weber's Law, since it could drive stimulus evolution in counterintuitive directions ; European Union Horizon 2020 ; Biotechnology and Biological Sciences Research Council (BBSRC) ; European Research Council (ERC) ; University of Cambridge

20 p. publisher's catalog at end: Mr. Murray's forthcoming works. ; Printer's statement on verso of title page and p. 415: London : Printed by Spottiswoode and Co., New-Street Square and Parliament Street. ; Includes index. ; Mode of access: Internet.

Errata: p. [1] at end of v. 5. ; Publisher's advertisements on 24 p. at end of v. 1 and v. 4. ; Pagination, v. 1: xxxvi, 578, [2], 24 p., [17] leaves of plates (6 folded); v. 2: xi, [1], 676 pages, [10] leaves of plates (2 folded); v. 3: xi, [1], 635, [1] p., [19] leaves of plates (4 folded); v. 4: xiv, 641, [3], 24 p., [16] leaves of plates (2 folded); v. 5: x, [2], 694, [2] p., [11] leaves of plates (2 folded). ; Translation of: Reisen und Entdeckungen in Nord- und Central-Afrika in den Jahren 1849 bis 1855. ; Includes bibliographical references and index. ; Mode of access: Internet.

Hollander 2508: Binding: Early 20th-century half red sheepskin over marbled boards; gold lettering on spine; top edge gilt. ; Hollander 2508: Provenance: "Mr. Hutches Town[?]" inscribed in ink on title-page. ; Signatures: [A]² B-G H². ; Colophon: "London : Printed by A. & R. Spottiswoode, New-street Square." ; Mode of access: Internet.

No other recorded copy of this work identified at time of cataloging. ; Royal arms at head of title. ; Signatures: 8D². ; Imprint from colophon. ; Caption title. ; Mode of access: Internet.

No other recorded copy of this work identified at time of cataloging. ; Royal arms at head of title. ; Signatures: 3I². ; Imprint from colophon. ; Caption title. ; Mode of access: Internet.

Publisher's advertisements facing title page, and (32 p.) following main sequence, dated April, 1880; printed by J. Ogden and Co. ; "London: Printed by Spottiswoode and Co., New-Street Square and Parliament Street."--Title page verso. ; "First edition."--Cf. Tinker. ; Butler Cat. of Swinburne, ; Shepherd, R.H. Swinburne, ; Tinker Lib., ; Kerr, L. Swinburne Cat., ; Mode of access: Internet. ; Spec: Copy 2: Illustrated bookplate on front pastedown: Swinburne Collection of Evelyn & Lowell Kerr. Textblock cracking at gutter. ; Spec: Copy 1: In manuscript on half-title: John E. Holloway. Binding extremely worn; cloth puckering; covers stained and scuffed; mid-spine damaged; front hinge cracked; new endpapers. ; Spec: Copy 1 & 2: Bound in blue-green cloth; gilt fillet line-border on front cover and in blind on rear cover; gilt lettering and publisher's device on spine; corners bumped; partially unopened.

"Theresa Watts, sister of Theodore Watts."--Cf. Kerr. ; Publisher's advertisement facing half-title; and (32 p.) at end dated October, 1884; printed by J. Ogden and Co. ; "London: Printed by Spottiswoode and Co., New-Street Square and Parliament Street."--Half-title verso. ; "First edition."--Cf. Kerr. ; Wise, T.J. Swinburne Lib. (1925), ; Wise, T.J. Swinburne (Bonchurch), ; Butler Cat. of Swinburne, ; Kerr, L. Swinburne Cat., ; Mode of access: Internet. ; Spec: Copy 2: Illustrated bookplate on front pastedown: Swinburne Colletion of Evelyn and Lowell Kerr. In manscript on front flyleaf: "To Miss Watts with kind regards from A.C. Swinburne." ; Spec: Copy 1: Armorial book-plates: Lowell Kerr; T. Tileston Wells. ; Spec: Copies 1 & 2: Bound in blue-green cloth; gilt fillet line-border on front cover and in blind on rear cover; glt lettering and publisher's device on spine; corners bumped; cloth puckering on covers; paper slightly browning.

"London: Printed by George E. Eyre and William Spottiswoode"--t.p. verso of v. 2. ; "London: Printed by W. Clowes and Sons"--t.p. verso of v. 1. ; Consists largely of tables. ; V. 2 has other title information: "with discussions of the observations at St. Helena, the Cape of Good Hope, the Falkland Islands, Carlton Fort in North America, and Pekin." ; Mode of access: Internet.

Publisher's advertisement facing title page. ; Dedicated, "To Christina G. Rossetti."--P. [v]. ; "London: Printed by Spottiswoode and Co., New-Street Square and Parliament Street."--Title page verso. ; "First edition."--Cf. Kerr. ; Shepherd, R.H. Swinburne, ; Wise, T.J. Swinburne (Bonchurch), ; Wise, T.J. Swinburne Lib. (1925), ; Kerr, L. Swinburne Cat., ; Mode of access: Internet. ; Spec: Copy 3: Armorial bookplate of Lowell Kerr on front pastedown. Paper browning. ; Spec: Copy 2: Bookplate: Exlibris John A. Spoor, 1921. Ms. note affixed to front fly-leaf: "Swinburne's Roundels ., with autograph letters attached both from Swinburne himself and from W. Theodore Watts-Dunton, in reference to it"--A.H.J. (i.e., Alexander H. Japp), the recipient of the letters. Manuscripts removed to Modern Manuscripts, Swinburne Collection. Cloth puckering; paper browning; very fragile. ; Spec: Copy 1: Armorial bookplates: T. Tileston Wells; Lowell Kerr. Bookseller's label on front pastedown at lower spinefold: Sold by Slatter and Rose, Oxford. Cloth puckering; scuffed; head of spine damaged. ; Spec: All copies: Bound in blue-green cloth; gilt fillet line-border on front cover and in blind on rear cover; gilt lettering on spine; corners bumped.