XXX 
INTRODUCTION. 
Genus Hirundo, Lmn. 
Tlie members of the genus Hirundo, or true Swallows, inhabit Europe, Asia, Africa, North America, the Indian 
Islands and Australia, where the European and American chimney Swallows, Hirundo rustica and H. rufa, are 
beautifully represented by the H. neoxena. 
62. Hirundo neoxena, Gould ............. Vol. II. PI. 13. 
Hirtcndo neoxena, Gould in Proc. of Zool. Soc, Part X. p. 113. 
Genus Chelidon, Bote. 
1 find that by some unaccountable mistake I have placed the Australian members of this genus in that of 
CoUocalia, — an error which I take this opportunity of correcting. 
The two species inhabiting Australia are both represented by others in Europe, Asia, Africa and America. 
They differ somewhat from each other in habits, one always resorting to the holes of trees for the purpose of 
nidification, and the other building a clay nest similar to those constructed by the martins of Europe and America. 
53. Chelidon arborea. 
Collocalia arborea, Gould ............. Vol. II. PI. 14. 
54. Chelidon Ariel. 
CoUocaha Ariel, Gould . ' . Vol. II. PI. 15. 
Family MEROPID^, Fig: 
Genus Merops, Linn. 
India and Africa may be said to be the great nursery of this lovely group of birds ; one species of whichj 
common in the southern parts of Europe, is beautifully represented in Australia by the Merops ornatus, the only 
species inhabiting that country. 
55. Merops ornatus, Lath. ............. Vol. II. PL 16. 
Family 
Genus Eurystomus, Vieill. 
One species of this genus is found in Australia, and others inhabit India and Africa. They are closely allied to 
the Rollers, and not very distantly related to the Halcyons. 
56. Eurystomus Australis, Swains. . Vol. II. PI. 17. 
Family HALCYONID^, Ftg: 
Genus Dacelo, Leach. 
The members of the genus Dacelo comprise the largest species of the great family of the Halcyonidce, and form 
a conspicuous portion of the ornithology of Australia ; but remarkably enough are confined to the south-eastern 
and northern portions of the country, the south-western parts being uninhabited by any species of this group. I 
believe that water is not essential to their existence, and that they seldom if ever drink. They feed almost 
