THE GENERAL SUBJECT. 
Aves 25 
Retchenow, a. Neue Vogel aus Ostafrika. Om. Centralbl. 1879, 
pp. 107, 114, 138, 155, 
From the novelties sent by Dr. Fischer from Zanzibar, two new genera 
and species, Cosmopsarus, Speculipastor [^Sturnidce] and one new species 
Trochocercus \^Miiscicapidce] are selected for description in the first paper ; 
9 new species, Thamnohia^ Sylviella, Hapalus \^Sylviidce\ Vidua^ Urcegin- 
tJius [^Ploceidce'}, Dryoscopus \^LaniidcE\ Cypselus \^Cypselidaf\^ Barbatula 
\CapitonidcR\^ Colius\^Coliid(n\ in the second; in the third, in anticipation 
of the J. f. O., 5 new species : — Pitylia \^Ploceidce], Cuculus [^Cuculidce], 
Criniger (2) IPycnonotidcB^^ Aedon [^Sylviidce'] are described ; and in the 
last 1 new genus and species, Spilocorydon [AlaudidcBj^ and 1 new species, 
Turdirostris [^Timeliidce], are added. 
& SCHALOW, H. Compendium der neu beschriebenen Gattungeu 
und Arten. i. ii. J. f. O. 1879, pp. 308-329, 420-437. 
The first and second instalments of a reproduction of the descriptions 
of recently-named genera and species. 
Reinhardt, J. See Mitua salvini, sp. n. ICracidcc'], (Edemia, Somateria 
[Anatidce]. 
Ridgway, R, Descriptions of several New Species and Geographical 
Races of Birds contained in the Collection of the United States 
National Museum. Pr. U. S. Nat. Mus. i. pp. 247-252 [Dec. 18th, 
1878]. 
The forms and species named are Rhodinocichla rosea, )8, schistacea 
{^Tiirdidm'], Emhernagra rufivirgata, crassirostris, E. y, verticalis, 
Loxigilla violacea, bahamensis \_Fringillidce], Anas aberti, sp. n ( ? , /I. 
wyvilliana, Scl., being also described) [^Anatidie'\. 
. Description of Two New Species of Birds from Costa Rica, and 
Notes on other rare species from that country. Tom. cit. pp. 252-255. 
The new species are Thryophilus zeledoni [^Troglody tides] and Pseudo- 
colaptes lawrencii \De)xdroGolaytidoe]\ Carpodectes nitidus and Junco voU 
cani are also noticed. 
. Descriptions of New Species and Races of American Birds, includ- 
ing a Synopsis of the Genus Tyrannus, Cuvier. Tom. cit. pp. 466- 
486 [May 22nd, 1879]. 
In the first portion of this paper, 13 species are enumerated and 
described under the genus Tyrannus^ 1 being new ; for those in the second 
portion, see Tyrannidce, Ccerebidee, Paridee. 
. On the use of Trinomials in Zoological Nomenclature. Bull. Nutt. 
Orn. Club, iv. pp. 129-133. [A German translation has appeared in 
J. f. O. 1879, p. 410.J 
. In an Appendix to Mary Dartt's “ On the Plains and among 
the Peaks ; or. How Mrs. Maxwell made her Natural History Collec- 
tion.” Philadelphia : 1879. 
The above writer enumerates 234 species and varieties obtained in 
Colorado, and describes a new variety of Owl, Scops asio var. E. max- 
