20A. Bi7TLER o// a Nezv Aminodfamus. [J^'y 



tory in New York. My friend. Prof. J. A. Allen, the Curator 

 of the zoological department of the Museum, having placed the 

 Hummingbirds contained in the collection in my hands for iden- 

 tification, I have great pleasure in giving his name to this ap- 

 parently new bird. The only known species with which this 

 one can be compared seems to be the Thanmatias cceruleiceps^ 

 Gould, P. Z. S. (i860), p. 240, from Bogota, now I suppose 

 contained in the British Museum collection, but it diflers from 

 that bird in some seemingly important particulars. The green- 

 ish blue of the head is not shining, but rather dull, and does not 

 extend onto the back of the neck. The tail of shining bronze 

 instead of having "a faint indication of a zone of brown across 

 the outer feathers near the tip," has all the rectrices tipped with 

 pale gray, very conspicuous on the outermost feathers, gradually 

 diminishing in extent to the central pair, which have but an in- 

 dication of gray at the tip. The under tail-coverts instead of be- 

 ing gray with brown centres, are pale brown with white edges. 

 In size the two species seem to be about equal, except that 

 the tail oi cceruleiceps is stated to be but half an inch in length, 

 while that of A. alleni is i 7-16 inch. It is possible that there 

 may be a typographical error in the figures given of the length of 

 tail in Mr. Gould's species. Professor Allen will later on pub- 

 lish a list of the species contained in Dr. Rusby's collection. 



ON A NEW SUBSPECIES OF AMMO D RAMUS SAND- 

 WICHENSIS FROM MEXICO. 



BY AMOS W. BUTLER. 



Certain peculiarities in some Savanna Sparrows taken by me 

 in the winter of 1S79-80, within the Valley of Mexico, induced 

 me to undertake a comparison with the forms generally recognized 

 as Mexican and with the United States form which might possibly 

 extend toward the Mexican plateau in winter. In my studies I 

 have, through the kindness of Mr. Robert Ridgway and Mr. J. A. 

 Allen, been permitted to examine the series of Western and Mex- 



