21 
of Australia and the island of Van Diemen’s Land constitute the 
habitat of the species. 
16. Astur radiatus Vol. I. PI. 16. 
Astur testaceus (Ernest.), Kaup, Isis, 1847, p. 367. 
A curious form not quite agreeing with Astur ; it is very rare, and 
nothing whatever is known of its habits. 
17. Astur approximans, Vig . Horsf. .... Vol. I. PI. 17. 
Astur radiatus , Cuv. Reg. An., 1829, p. 332. 
Nisus ( Urospiza ) radiatus , Kaup, Mus. Senckenb., 1845, p. 259. 
( ) approximans , Kaup, Isis, 1847, p. 182. 
Accipitur approximans , List of Birds in Brit. Mus. Coll., Part I. 
2nd edit. p. 74. 
The Astur approximans has been with propriety removed to the 
genus Accipiter by Mr. G. R. Gray, and to this genus my A. cru- 
entus is also referable ; for although of a larger size than the other 
members of that form, their structure, except in the shorter middle 
toe, is very similar. 
18. Astur cruentus, Gould Vol. I. PI. 18. 
Astur cruentus , Gould in Proc. of Zool. Soc., Part X. p. 113. 
This species and the preceding are representatives of each other 
in the eastern and western portions of the continent. 
I have lately seen specimens from Port Essington. 
Genus Accipiter. 
19. Accipiter torquatus Vol. I. PI. 19. 
Sparvius cirrhocephalus , Vieill. Nouv. Diet. d’Hist. Nat., tom. x. 
p. 328. 
tricolor , Vieill., ibid. p. 329. 
Falco melanops, Lath. Ind. Orn. Supp., p. 12? 
Sparvius melanops , Vieill. Nouv. Diet. d’Hist. Nat., tom. x. p. 239 ? 
Astur ( Micronisus ) torquatus , Kaup, Mus. Senckenb., 1845, 
p.259. 
Nisus ( Urospiza ) torquatus , Kaup, Isis, 1847, p. 181. 
Accipiter cirrhocephalus , List of Birds in Brit. Mus. Coll., Part I. 
2nd edit. p. 73. 
Precisely similar in all its actions and in its economy to the 
Sparrow Hawk, Accipiter nisus of Europe. 
Genus Buteo. 
Several species of the genus Buteo are dispersed over the great 
continents of Europe, Asia, Africa and America, but only one has 
yet been discovered in Australia. 
20. Buteo melanosternon, Gould. Vol. I. PI. 20. 
This bird departs somewhat in form from the typical species of 
the genus Buteo ; but so little is known respecting it that we are 
ignorant how far this departure may influence its habits and eco- 
nomy. One most singular story has been transmitted to me and is 
