888 The American Naturalist. [ October, 
10. Phlegoenas johanne Sclat. Duke of York Island. 
11. Phlegoenas granti Salvad. Guadalcanar, Solomon Is- 
lands. 
12. Phlegoenas vitiensis Finsch. Fiji Islands. 
13. Phlegoenas stairi G. R. Gray. Tonga Islands. 
14. Phlegoenas samoensis Finsch & Hartl. Samoa Islands. 
15. Phlegoenas canifrons Hartl & Finsch. Pelew Islands. 
16. Phlegoenas virgo Reichenow. Pelew Islands. 
17. Phlegoenas pampusan Quoy et Gaim. Marianne or Lad- 
rone Islands. 
18. Phlegoenas kubaryi Finsch. Ruk I., Carolines. 
19. Phlegoenas erythroptera Gmel. Eimeo, Society Islands. 
20. Phlegoenas albicollis Salvad. Bow Island, Paumotu Is- 
„ands. 
21. Phlegoenas pectoralis Peale. Carlsoff, Paumotu Islands. 
22. Phlegoenas yapensis Hartl. & Finsch. Uap, Mackenzie 
Islands. 
The genus Phlegoenas shows a very extensive differentiation 
of species on the different groups of islands. On the Philip- 
pines there are three species, two confined to single islands, 
and the third to two other islands. Celebes has a peculiar 
species on the north and one on the south end. One species 
is found on the N. W. Papuan Islands and New Guinea, 
another one on the Aru Islands and southern New Guinea, a 
third one is on New Guinea, Duke of York Island and New 
Britain. All the other 14 species are restricted to single local- 
ities: New Guinea ; Duke of York Island ; Guadalcanar, Sol- 
omon Islands; Fiji Islands; Tonga Islands; Samoa Islands; 
two to the Pelew Islands; Marianne Islands; Ruk Island, 
Carolines; Eimeo, Society Islands; Bow Island, Paumotu 
group; Carlshoff, Paumotu group; Uap, Mackenzie Islands. 
This peculiar differentiation of Phlegoenas can only be ex- 
plained by the former connection of these islands, and not by 
accidental immigrants. This is another proof for the former 
existence of a Pacific Continent. | 2 
I shall now discuss the geographical distribution of two 
genera of the Sturnoid Passerine Birds, the Sturniformes. 
