XXX INTRODUCTION. 
Genus Hirunvo, Linn. 
The 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. neowena. 
52. Hirundo neoxena, Gould. : , 5 : ; : - é Vol. II. Pl. 13. 
Hirundo neowena, Gould in Proc. of Zool. Soc., Part X. p. 113. 
Genus Cueiivon, Boie. 
I find that by some unaccountable mistake I have placed the Australian members of this genus in that of 
Collocalia,—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 . f : ; : ; ; : ; ; “ F Vol. II. Pl. 14. 
54. Chelidon Ariel. 
Collocalia Ariel, Gould. : 1 A 2 : ’ ‘ : ; . ‘ i Vol. IL. Pl. 15. 
Family MEROPIDA, Fie. 
Genus Merops, Zinn. 
India and Africa may be said to be the great nursery of this lovely group of birds; one species of which, 
common in the southern parts of Eufope, is beautifully represented in Australia by the Merops ornatus, the only 
species inhabiting that country. 
55. Merops ornatus, Lath. . . ; ; : 5 ; i , ’ : d . Vol. II. Pl. 16, 
Family —— ? 
Genus Eurysromus, Vieil/. 
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. . : Q 2e aioe . : - “Vol R erage 
Family HALCYONIDA, Vig. 
Genus Daceno, Leach, 
The members of the genus Dacelo comprise the largest species of the great family of the Haleyonide, 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 
