Recently published Ornithological Works. 
763 
92. Madardsz on new Birds from Africa. 
[Neue Vogel aus Afrika, beschrieben von Dr. J. v. Madarasz. Ann. 
Mus. Nat. Hungar., 1911.] 
The new species described are Upupa butleri, Riparia 
nigricans, Cisticola sudanica, Passer alexandrinus , P. niker- 
soni, and P. albiventris. It is certainly curious to discover 
a new Sparrow at Alexandria, especially if, as is stated, 
Passer domesticus also occurs in the same district. 
93. Madardsz on Two Humming-birds. 
[Ueber Thalurania venusta (Gould) und Colibri cabanidis (Heine) als 
selbstandige Formen. Von Dr. J. v. Madarasz. Ann. Mus. Nat. 
Hungar., 1911.] 
The author is of opinion that Thalurania venusta (Gould) 
of Central America has been incorrectly united to T. colum- 
bica (Bourc.) of Colombia and Venezuela, and that the 
two species are quite distinct. He also maintains that 
Colibri cabanidis of Costa Bica ought not to be united with 
C. cyanotis of Colombia and Venezuela. 
94. Mathews on Alterations in the Nomenclature of 
Birds . 
[On some necessary Alterations in the Nomenclature of Birds, Part II. 
By Gregory M. Mathews. Nov. Zool. xvii. p. 503.] 
This is a continuation and completion of the author's 
previous article on the same subject, which we have already 
noticed (above, p. 392) ; it contains large additions to the 
list of proposed changes in the nomenclature of birds. 
Mr. Mathews gives us no less than 22 pages of them and 
the explanatory remarks. It seems to us to be a mistake to 
insist on these changes unless the retention of the generally 
adopted names is likely to cause confusion. 
Mr. Mathews is ready to adopt “ Brisson's ” names, but 
rejects those of “Gronow,” while he gives some important 
information with regard to the dates of certain works of 
Lesson, Swainson, Cuvier, and Vieillot. 
