Recently published Ornithological Works. 135 
species of the genus Empidonax lay white eggs (EH. minimus, 
E. obscurus, and E. hammondi); the others have strongly 
marked eges, except H. flaviventris, in which case it seems 
that eggs of both forms occur. 
3. Dubois on Additions to the Avifauna of Belgium. 
[Remarques sur la Faune de Belgique, par M. Alph. Dubois. Bull. 
Acad. R. Belgique, 2me sér., xlvi. no. 6 (1879). ] 
Records the occurrence of Turdus sibiricus, Petrocincla 
cyanus, and Emberiza pusilla in Belgium. 
4. Dubois on two new Birds. 
[Descriptions d’Oiseaux Nouveaux, par M. Alph. Dubois. Bull. Acad. 
R. Belgique, 2™e sér., xlvii. no. 6 (1879). ] 
The species described are Hypoxanthus equatorialis, which 
is the Ecuadorian form of H. rivolii (distinguishable by its 
black rump and smaller bill), and Huplocamus sumatranus 
said to be from Sumatra. But the Sumatran Luplocami which 
we have examined are certainly referable to H. vieilloti. 
5. Elliot’s Monograph of the Hornbills. 
[A Monograph of the Bucerotid, or family of the Hornbills. By 
D. G. Elliot, F.R.S.E. &e. Part VI. Small folio: 1878. Published by 
the author. | 
Mr. Elliot has issued the sixth number of his ‘ Monograph of 
the Hornbills’ since we last mentioned this work. We trust 
he will bring this useful but somewhat lingering piece of 
work to a speedy conclusion. 
Part vi. contains illustrations of the following species :— 
Bucorvus pyrrhops. Anthracoceros fraterculus. 
Ceratogymna elata, Rhytidoceros subruficollis. 
Hydrocissa exarata. Tockus erythrorhynchus. 
6. Godman and Salvin’s ‘ Biologia Centrali-Americana.’ 
[Biologia Centrali-Americana ; or Contributions to the Knowledge of 
the Fauna and Flora of Mexico and Central America. Edited by F. 
Ducane Godman and Osbert Salvin. (Zoology.) Parts I & HU. 4to: 
London, 1879. Published for the Editors by R. H. Porter, 10 Chandos 
Street, Cavendish Square, W.] 
