Croft, William (2000). Explaining Language Change: An Evolutionary Approach. Harlow, Essex: Longman. This book develops and account of language change using modern evolutionary ideas in the tradition of Hull and others. It is a very good starting point getting an up-to date overview of evolutionary arguments in linguistics.
Naumann, Bernd, Frans Plank and Gottfried Hofbauer, Eds (1992). Language and Earth: Effective Affinities between the Emerging Sciences of Linguistics and Geology. Philadelphia, J. Benjamins Publ. Co. This edited volume contains 17 essays that compare the intellectual developments in linguistics and geology in the 19th century
Schleicher, August ((1983). ). Die Sprachen Europas in Systematischer ?˙bersicht: Linguistische Untersuchungen. With a new introdu. Philadelphia, John Benjamins Publ. Co. Provides an overview of the early connections between evolutionary thought in linguistics and biology before Darwin published his On the Origin of Species, 1859.
Schleicher, August, Ernst Heinrich Philipp August Haeckel and W. H. I. Bleek ((1983). [1863, 1865, 1867]). Linguistics and Evolutionary Theory: Three Essays. With an introduction by J. Peter Maher. Philadelphia, J. Benjamins. Three essays by Schleicher, Bleek and Haeckel protray the early reactions in linguistics to the ideas of Darwin.
Senghas, Ann , Sotaro Kita, and Asli ├ľzy├╝rek (2004). "Children Creating Core Properties of Language: Evidence from an Emerging Sign Language in Nicaragua." Science, Vol. 305, (1779-1782). This article provides important new evidence on language development, analyzing an amazing natural experiment in Nicaragua where deaf children created a new sign language.
Taub, Liba (1993). "“Evolutionary Ideas and ‘Empirical’ Methods: The Analogy Between Language and Species in the Works o." British Journal for the History of Science, 26, (171-193).