356 Recent Literature. {juW 



books and local collections available to present day bird lovers. In this 

 republication of Thoreau's bird notes the original author of them is most 

 fortunate in ha%ang the work fall to the lot of an editor and commentator 

 so sympathetic, intelligent, and painstaking. The 'notes' are of course 

 fragmentary, but when brought together chronologically form a consider- 

 able amount of text about each of the more common species of the 'Concord 

 region ', where Thoreau lived, made surveys, walked in the woods and fields, 

 and made daily note of what he saw and experienced. 



The present volume is made up exclusively of excerpts from the 'Journal,' 

 but the editor has given in an Appendix an index to the bird matter con- 

 tained in Thoreau's other works, so that within the present volume are 

 given not only the passages contained in the 'Journal' but an index to 

 all of Thoreau's other ornithological references, these amounting, it is 

 stated, "to less than one twelfth as much as that contained in the 'Journal'." 

 A map of Concord, compiled by Herbert W. Gleason, shows the localities 

 mentioned by Thoreau in his Journals, and is based in part on Thoreau's 

 own surveys. This map is furnished with an index, thus greatly facilitat- 

 ing its use in reading the 'Notes,' and furnishing pilgrims to the haunts of 

 Thoreau with the means of locating and identifying his favorite resorts. — 

 J. A. A. 



Ridgway on New Forms of Swifts and Hummingbirds.' — In this paper 

 Mr. Ridgway describes a new species of Choetura (C. richmondi) from Costa 

 Rica, a new subspecies of Streptoprocne from Mexico, and two new sub- 

 species of Cypseloides niger, respectively from Costa Rica and Jamaica; 

 also a new species and five new subspecies of Hummingbirds, mostly from 

 Mexico and Costa Rica. A new genus Nesophlox is proposed, with Tro- 

 chilus evehjnos Bourcier as the type. — J. A. A. 



Swarth on Two New Owls from Arizona.- — The first of the two new sub- 

 species here described is Otus asio gihnani, nearly related to O. a. cinera- 

 ceus, but described as paler and smaller, and as occupying a different life 

 zone, it inhabiting "the giant cactus country, valleys and mesas which 

 are subject to extremes of heat and aridity, while cineraceus is at home 

 along the shaded canon streams and on densely timbered hillsides." The 

 other is a subspecies of the Spotted Owl, and is named Strix occidentalis 

 huachucce, described from a single specimen from the Huachuca Moun- 

 tains of Arizona, and as differing from true S. occidentalis in being paler 

 and smaller. The juvenal plumage of the latter is here described for 

 the first time from two specimens taken near Pasadena. California, both 

 from the same brood and just able to fly when captured. — J. A. A. 



1 Diagnoses of new forms of Micropodidse and Trochilidse. By Robert Ridgway. 

 Proc. Biol. Soc. Washington. Vol. XXIII, pp. 53-56, April 19, 1910. 



2 Two New Owls from Arizona, with Description of the Juvenal Plumage of Strix 

 occidentalis occidentalis (Xantus). By Harry S. Swarth. University of California. 

 Publications in Zoology, Vol. VII, No. 1, pp. 1-8. May 26, 1910. 



