TITLES OF WORKSj ETC. 
Aves. 23 
Ramsay, R. Wardlaw. On an undescribed species of Nuthatch and 
another Bird from Karen-nee. P. Z. S. 1876, p. 677. 
Reichenow, a. Osteologie von Chionis minor und Stellung der Gat- 
tung im system. J. f. O. 1876, pp. 84-89. 
Dr. Reichenow concludes, from an examination of the skeleton, that 
Chionis should bo placed in the family Charadriidm^ near the' genera 
Glareola and Ilcematopus. 
. Pious {Campothera) permistus^ u. Tom. pp. 95-97. 
. Ueber Sycohius ruhriceps, sp. n., von W. Afrika. Tom. cit. 
p. 209. 
Ridgway, Robert. Second Thoughts on the genus Micrastar. Ibis, 
1876, pp. 1-5. 
A revision of the author’s previous monograph (Zool. Rec. xii. p. 50), 
suggested by an examination of the specimens of Micrastur in the col- 
lection of Messrs. Salvin & Godman. \ Falconidco.'] 
. The genus Glaucidium. Tom. cit. pp. 11-17. 
In this paper, the author’s former monograph (P. Bost. Soc. xvi.) 
and Mr. Sharpe’s review of the genus (Ibis, 1874) are criticised, with 
special reference to Mr. Sharpe’s views. The number of valid American 
species is reduced from Ridgway, 1873 (8), Sharpe, 1874 (9) to 6, and 
reasons given for this reduction. One species is figured. \_Strigidco]. 
. Notes on the Genus Ilelminthophaga. Tom. cit. pp. 166-171. 
Contains a diagnostic table of the ton speciosjrocognizod by the author, 
and notes on some lately described species. . 
. Studies of the American Falconidce. Monograph of the Poly- 
hori. Bull. U. S. Geol. Surv. i. pp. 451-473, pis. xxii.-xxvi. 
The Polyhori are defined as a group of the sub -family FalconincB of 
the Falconidco, differential characters being given. Four genera are 
characterized, and the species contained in them discussed as 
regards synonymy, distribution, &c. Polyhoras luto&us, is described 
as new. 
. Studies of the American Falconidco. Op. cit. ii. pp. 91-182, pis. 
XXX. & xxxi. '' 
Treats of a number of American Falconidce, both as to the characters 
of the genera and of their component species. The range of the latter, 
their synonymy and characters are fully given. [Falconidco.'] 
. Ornithology of Guadeloupe Island, based on notes and collec- 
tions made by Dr. Edward Palmer. Tom. cit. pp. 183-195. 
An account of a small but interesting collection of birds, wherein it 
is shown that all the land birds differ, specifically or as varieties, from 
their representatives on the mainland. 12 species are enumerated, of 
which 3 are undetermined. [Sylviidee, Troglodytidco, Fringillidco, 
Picidco.] 
