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. H. Publ. 125. Orn. Ser. Vol. i. No. 3.] 
Mr. Dearborn bases bis 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 Centralis 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 cganura guatemalce , Diglossa montana, 
Regulus satrapa clams , and Planesticus ty'istis 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. Dewar 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.Q. 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 explanations which have been 
