276 Mr. P. L. Sclater on an undescribed Species of Hawk. 
is the Accipiter poliocephalus of Mr. G. R. Gray, from the Aru 
Islands, described in the c Proceedings of the Zoological Society ' 
for last year*. It is, however, quite distinct in coloration from 
that bird. Other near relatives seem to be Accipiter rufitor- 
ques +, of the Feejee Islands, Accipiter hyogaster%, of Amboyna, 
and Astur trinotatus§, of Celebes. Mr. Gurney thinks that these 
species, together with the well-known so-called Goshawk of New 
Holland [Astur novae hollandioe, Gould, B. Austr. i. pis. 14, 15), 
constitute a small group of stout-built Hawks, which may be con¬ 
sidered in some degree distinct. The term Leucospiza , proposed 
by Hr. Kaup for the isolation of Falco novae hollandioe, might be 
employed for the subgeneric denomination of these birds. They 
are all remarkable for simplicity of coloration in an Order where 
this is the rule rather than the exception. 
Besides Accipiter haplochrous, Mr. Gurney received three 
other species of Accipitres in the same collection, namely, Hali- 
astur sphenurus (Gould, B. Austr. i. pi. 5), J and $, killed at 
Port S. Vincent, New Caledonia, May 21st, 1858 ; Astur ap - 
proximans (Gould, B. Austr. i. pi. 7), $ juv., from “ Nu," New 
Caledonia, March 21st, 1858; and three examples of a Circus , 
probably identical with Circus assimilis, as figured in Gould's 
( Birds of Australia' (i. pi. 26). The latter were obtained in Port 
de France and Port S. Vincent in March, April, and May, 1858. 
Mr. G. R. Gray has lately communicated to the Zoological 
Society a “ List of New Caledonian Birds," which was read at 
their Meeting on May 10th last; and gives a complete account 
of what is known of the ornithology of this island. 
The accompanying figure of Accipiter haplochrous is by Mr. 
Wolf, and represents the bird reduced to one-third of its natural 
dimensions. 
* See P. Z. S. 1858, p. 170. 
t Accipiter rufitorques, Peale, Zool. U. S. Expl. Exp., Birds, p. 68; 
Cassin, ibid., ed. 2. p. 90, Atlas, pi. 2. figs. 1 & 2. This species is figured 
by M. M. Hombron and Jacquinot in Plate 2 of the Atlas of the “ Voyage 
au Pol Sud,” as “ Epervier oceanien, $ ou variete”; their (e Epervier 
oceanien <S ” being referable to Accipiter hyogaster. See Dr. Pucheran’s 
remarks in the “ Zoologie ” of the same work, vol. iii. p. 48. 
X Falco hyogaster, Mull. Verh. Ethn. p. 110. 
§ Astur trinotatus, Temm. MS.: Bp. Consp. i. p. 33. 
