200 Recently published Ornithological Works. 



7. Dearborn on Birds from Guatemala. 



[Catalogue of a Collection of Birds from Guatemala. By Ned 

 Dearborn, Assistant Curator of Ornithology. Chicago, 1907. Field 

 Mus. of N. II. Publ. 125. Oru. Ser. Vol. i. No. 3.] 



Mr. Dearborn bases his paper on three collections made 

 for the " Field-Museum " of Natural History, in Chicago, 

 and containing altogether 1187 specimens, which are referred 

 to 305 species and subspecies. The principal collection was 

 made by Mr. Dearborn himself in 1906. The author 

 commences by an exact list of the localities which he visited 

 in Guatemala, and devotes several pages to a description of 

 their physical peculiarities. 



The labours of the late Osbert Salvin and others, as 

 explained in the ' Biologia Centrali- Americana/ have made 

 us well acquainted with the Ornithology of Guatemala. 

 Mr. Dearborn has, therefore, as was to be expected, found 

 few novelties in his series, and has described only four as 

 new : Saucerottea ct/anura guatemalae, Diylossa montana, 

 Regulus sutrapa clarus, and P lanes ticus tristis rubicundus. 

 The last-named is based on a single specimen — how can 

 anyone decide that it is not an individual variety? 



Some short notes on the habits, exact localities, and other 

 peculiarities are added under each species. 



8. Dcivar and Finn on the Making of Species. 



[The Making of Species. By Douglas Dewar, B.A. (Cantab), I.C.S., 

 F.Z.S., and Frank Finn, B.A. (Oxon), F.Z.S., M.B.O.O. London: 

 John Lane, 1909.] 



This work, which contains an examination into the more 

 recent researches and theories of the cause or causes of 

 Evolution, has been prepared by an Indian Civil Servant, 

 Mr. Douglas Dewar, who has devoted his leisure time in 

 India to zoological study and observation, and by a well- 

 known writer of popular works of Natural History, Mr. Frank 

 Finn. The authors regard Evolution as a theory now 

 universally accepted, and devote most of their space to the 

 discussion of the various explanaticns which have been 



