256 Oberholser, A New Geothlypis. Vl^t 



Cyanocitta stelleri azteca. Aztec Jay. 



Similar to C. s. diademata ( = Cyanura macrolopha Baird ') but neck, 

 "back, and scapulars dull blue, instead of brownish gray, crest more or 

 less tinged with blue, and the general blue color much deeper (rump, 

 underparts, etc., azure blue instead of pale blue or turquoise blue, the 

 wing-coverts, secondaries, and tail dull paris blue instead of dull cobalt 

 blue) ; streak on forehead more tinged with blue. 



South-central Mexico, in the States of Vera Cruz (Orizaba, etc.), Puebla, 

 Morelos, Mexico, and Michoacan. 



Type, No. 35156, U. S. Nat. Mus., Mountains near Mirador, Vera Cruz, 

 June, 1864 ; C. Sartorius. 



The name Cyanocitta galeata Cabanis is a synonym of C. s. 

 (oronata (Swains.), Cabanis, like Sharpe, having incorrectly 

 applied the name coronata to the present form. 



DESCRIPTION OF A NEW GEOTHLYPIS. 



BY HARRY C. OBERHOLSER. 



The form of Geothlypis trichas inhabiting the Pacific coast 

 region of the United States appears to be subspecifically distin- 

 guishable from that of the interior, to which it has heretofore 

 been referred. As the type of Geothlypis t. occidentalis came from 

 the Truckee River, Nevada, and thus represents the bird of the 

 latter area, it is the purpose now to separate the Pacific race 

 under the name 



1 The name Cyanocitta diademata or Cyanocitta stelleri diademata has been 

 quite universally misapplied to the form of southern central Mexico, here 

 renamed as above. The type locality of Bonaparte's Cyanogarrtdus diadematus 

 is Zacatecas, on the western side of the Mexican plateau ; and specimens col- 

 lected there by Mr. Nelson are distinctly referable to the Rocky Mountain form 

 which Prof. Baird later named Cyanura macrolopha. It therefore becomes 

 necessary to use the name diademata, instead of macrolopha for the Rocky 

 Mountain bird, and to rename the bird to which the name diademata has been 

 erroneously applied. 



