-
A new genus of tyrant-flycatchers
Vol 50, Page 1
-
The southern races of the great ant-shrike, Taraba major
Vol 50, Page 7
-
The status of Hyla evittata Miller
Vol 50, Page 9
-
A new species oi Spathacanthus from Guatemala
Vol 50, Page 15
-
Notes on Astragalus (Toumef. L)
Vol 50, Page 17
-
A race of the Derby Flycatcher from northwestern Mexico
Vol 50, Page 25
-
The Ferruginous Pigmy Owl of northwestern Mexico and Arizona
Vol 50, Page 27
-
A new mountain sheep from Lower California
Vol 50, Page 29
-
Studies in American spiders: the genus Aigola
Vol 50, Page 35
-
New species of hylid frogs from Mexico with comments on the rare Hyla bistincta Cope
Vol 50, Page 43
-
Five new North American zonitids
Vol 50, Page 55
-
Three new birds from the Malaysian subregion
Vol 50, Page 61
-
New races of the genus Otus from northwestern Mexico
Vol 50, Page 63
-
Revisional note on the didine birds of Reunion
Vol 50, Page 69
-
A new race oi Dactylortyx from Honduras
Vol 50, Page 73
-
A new kangaroo rat from southwestern Arizona
Vol 50, Page 75
-
The distribution of flying suirrels in western British Columbia with the description of a new race
Vol 50, Page 77
-
A new subspecies of the lizard genus Sceloporus from Texas
Vol 50, Page 83
-
Preliminary list of the butterflies of Virginia
Vol 50, Page 87
-
New plants from Oregon
Vol 50, Page 93
-
Four new birds from northwestern Mexico
Vol 50, Page 95
-
Two new owls from Sinaloa, Mexico
Vol 50, Page 103
-
The blue-gray gnatcatcher of southern Sonora
Vol 50, Page 109
-
A new ant-like thrips from Florida
Vol 50, Page 111
-
Notes on the nomenclature of the Trochidae
Vol 50, Page 115
-
Descriptions of two new passerine birds from the western United States
Vol 50, Page 117
-
Some new species and varieties of Oregon plants
Vol 50, Page 121
-
A new snake from southeastern China
Vol 50, Page 125
-
New N. A. leafhoppers belonging to Parabolocratus and related genera
Vol 50, Page 129
-
Two new pocket gophers of the Thomomys bottae group
Vol 50, Page 133
-
Reptiles and amphibians
Vol 50, Page 137
-
A new neotenic salamander from Texas
Vol 50, Page 141
-
On the flightless heron of Rodriguez
Vol 50, Page 145
-
New race of Chubbia jamesoni from Colombia
Vol 50, Page 151
-
Four new rodents from Monterey County, California
Vol 50, Page 153
-
The yellow-green vireo of northwestern Mexico
Vol 50, Page 159
-
The tiger-bittern of northwestern Mexico
Vol 50, Page 161
-
Concerning the genus Leptobyrsa Stal (Hemiptera)
Vol 50, Page 163
-
New species of mites of the subfamily Trombiculinae, with a key to the New World larvae of the akamushi group of the genus Trombicula
Vol 50, Page 167
-
Critical remarks on Crypturellus vanegatus and its allies
Vol 50, Page 175
-
A new species of Dryopteris, subgenus Eudryopteris, from Guatemala
Vol 50, Page 179
-
Description of a race of Perognathus parvus from Arizona
Vol 50, Page 181
-
Two new swifts of the genus Chaetura
Vol 50, Page 183
-
The pigeons of the Columba plumbea group
Vol 50, Page 185
-
A new race of Tinamus major from Brazil
Vol 50, Page 191
-
A new woodpecker of the genus Piculus from Sonora
Vol 50, Page 195
-
A race of Verreaux's dove from Sonora
Vol 50, Page 199
-
New races of Myadestes, Spizella and Turdus from northwestern Mexico
Vol 50, Page 201
-
A new Indian paint-brush from Mount Rainier
Vol 50, Page 207
-
Extinct chough from Rodriguez
Vol 50, Page 211
-
A new race of Peromyscus maniculatus from British Columbia
Vol 50, Page 215
-
A new race of Yuhina flavicollis, from the mountains of north Siam
Vol 50, Page 217
-
Description of a new chickadee from the eastern United States
Vol 50, Page 219
-
Four new mammals from Utah
Vol 50, Page 221
-
A new race of the spotted tinamou, Nothura maculosa, from the Paraguayan Chaco
Vol 50, Page 227