128 VISCOUNT WALDEN ON THE BIRDS 
land, linking, as it were, the Papuan and Indian regions. As we quit the mainland of 
the Indian region in the south-east, it is well known that the Indo-Ethiopian types 
diminish in number; and in the Philippines, as in Celebes, they may be said to be at 
their minimum. But along with them many Indo-Malayan types also disappear from — 
both these insular areas; while, on the other hand, they are replaced by peculiarly 
Papuan generic forms, and by a few peculiar forms not in numbers sufficient to balance 
the absence of the Indo-Ethiopian and the Indo-Malayan. We consequently find an ornis 
more anomalous in its admixture of forms, but poorer as regards species. So far as we 
know, it may be asserted that, after Celebes, the Philippine archipelago is the least rich 
in Indian genera and species of all the subareas of the Indian region; while, like 
Celebes, it is stamped with a marked Papuan character by the presence of Cacatua and 
Megapodius, and by its richness in members of the Psittacide, Alcedinidew, and 
Columbide. 
A glance at the table below will show the dearth existing in the Philippines of Indo- 
Malayan forms. Nine of these absent genera occur in Celebes, while the remaining 
sixty genera are wanting in both areas. On the other hand, thirty Indo-Malayan genera 
wanting in Celebes occur in the Philippines. 
TasLe I,—Showing the principal Indo-Malayan Genera wanting in the Philippines.— 
N.B. Those occurring also in Celebes are marked with an asterisk. 
*Polioaétus. Brachypteryx. Enicurus. Palzornis. 
*Neopus. *Trichastoma. Platylophus. Megalaima. 
Ketupa. Mixornis. Tephrodornis. Meiglyptes. 
Bulaca, Malacopteron. Buchanga. Hemicircus. 
Phodilus. Macronus. Dissemurus. Micropternus. 
Batrachostomus. Alcippe. Chaptia. Crysophlegma. 
Eurylaimus. Timalia. Bhringa. Tiga. 
Psarisomus. Garrulax. Hemipus. Sasia. 
Corydon. Pomatorhinus. Tchitrea. Dendrophila. 
Cymbirhynchus. Pteruthius. *Myiolestes. Rhopodytes. 
Calyptomena, Analcipus. Cissa. Coccystes. 
Nyctiornis. Myiophonus. Temnurus. Peloperdix. 
Chalcoparia. Phyllornis. Dendrocitta. Perdicula, 
* Anthreptes. Tora. Crypsirhina. Payo. 
* Aithopyga. Brachypodius. Eulabes. Argusianus. 
* Arachnothera. Tole. Ploceus. Polypectron. 
*Prionochilus. Criniger. Mirafra, Euplocamus. 
*Geocichla. 
The number of species peculiar to the Philippine archipelago, namely 106, amounts 
to nearly half of the total of known Philippine birds. 
This proportion is considerably 
less in the island of Celebes, where, out of a known total of 205 species, 73 only are 
