REVIEWS AND BOOK NOTICES. 549 
A. linarius of continental N. A., with var. Holbélli of Greenland 
in summer and continental N. A. in winter; III. A. flavirostris 
var. Brewsteri. Leucosticte griseinucha is united to tephrocotis as 
a variety, as are three others, campestris Baird, littoralis Baird, 
and (III, 509) australis Allen. The validity of Passerculus 
princeps Maynard, as distinguished from Centronyx Bairdi, is con- 
firmed. Passerculus alaudinus, Sandwichensis, and anthinus are 
considered to be geographical forms of P. savanna; and P. guttatus 
is united to rostratus. In the Appendix (III, 513), speaking of 
the fact that Coturniculus Lecontei is intermediate between CO. 
Henslowi and Ammodromus caudacutus, Prof. Baird remarks that 
“this renders it necessary to unite Ammodromus and Coturniculus 
into one genus, recognizing them as subgenera, definable chiefly 
by the different style of coloration of the superior surface in the 
two groups,” the name Ammodromus having priority. 
In the same appendix, p. 516, the capture in California of a 
Specimen intermediate between Passerella iliaca and Townsendi is 
said to render it “ extremely probable that all the — forms of 
this genus are but geographical races of one species.” 
To Melospiza melodia are allotted six varieties. Alauda arvensis 
of Europe claims admission, it having been captured in Greenland 
and Bermuda; and it has also been introduced in the vicinity of 
a York City, apparently with success. Eremophila cornuta 
“appears to be absolutely identical ” with E. alpestris of Europe, 
Which latter name has priority. Sturnella neglecta is united to 
. magna as a western race. 
Sturnus vulgaris, having been once obtained in Greenland, is 
included. The raven of Ne orth America is considered to be a race 
of the European C. corax. Another judicious change is the re- 
ferring of Pica Hudsonica and Nuttalli to P. caudata as varieties ; 
Nuttaiti being regarded as a local aberrant form of Hudsonica, 
differing chiefly i in its yellow bill. The difficult family of Tyran- 
nidæ receives a careful and interesting review. Contopus Richard- 
soni is given as vir ens, var.; and Empidonax Trailli as pusillus, 
Var. Chordeiles Henryi is considered to be a western form of C. 
ipetue, 
Of humming birds ten species are described, including the 
doubtful Mamaia: Linnæi. Lampornis mango is mentioned in 
a foot note o only. 
