Recently published Ornithological Works. 767 
peasei (Kapiti Plains); P. 1. phceocephalus (Uganda); Pogono- 
cichla cucullata keniensis ; Eminia lepida hypochlora (B.E.A.); 
Sylvietta whytii loringi (Fort Flail, B.E.A.). 
We may remark that the results arrived at by Mr. F. J. 
Jackson, who has lately studied the Francolins of B.E. Africa 
and Uganda (see above, p. 569), do not seem to coincide 
with those of Dr. Mearns. 
99. Oberholser on the Forms of the Ladder-backed Wood¬ 
pecker. 
[A Revision of the Forms of the Ladder-backed Woodpecker 
(Dryobates scalaris). By H. C. Oberholser. Pr. U.S. Nat. Mus. xli. 
p. 139 (1911).] 
Having compared a large series of specimens from various 
American Museums, Mr. Oberholser divides the Woodpeckers 
of the genus Dryobates allied to D. scalaris into subspecies. 
The six generally recoguised forms of this group are thus 
increased to fifteen, and nine are described as new sub¬ 
species.” An ouiline map illustrates the distribution of the 
group from Texas to Flonduras. 
100. Pycraft on the Skeleton of Palaeocorax. 
[On the Skeleton of Palceocorax moriorum. By W. P. Pycraft, 
M.B.O.U. Nov. Zool. xviii. p. 122.] 
Remains of this extinct bird w r ere discovered by Dr. H. 
O. Forbes in Chatham Island (see f Nature/ xlvi. p. 252). 
Mr. Pycraft gives us an excellent description of its bones, 
accompanied by a figure of its cranium. Though the skull 
agrees very closely with that of the Raven ( Corvus corax) 
it differs from it in one or two noteworthy particulars. 
Mr. Pycraft is doubtful whether this form ought to be 
considered as generically distinct from Corvus , but is certain 
that it has no generic connection with Gymnorhina. 
101. Reichenow on Birds from Spanish Guinea. 
[Ueber eine Vogelsammlung vom Rio Benito im Spanischen Guinea. 
Yon Anton Reichenow. Mitth. Zool. Mus. in Berlin, Band v. Fleft 1. 
Berlin, 1910.] 
From the territory called “ Spanish Guinea,” south of the 
