1914 BIRDS OF ARIZONA 37 



T51. Aeronautes melanoleucus (Baircl). 



Wii rn-;-THRC)ATi;u S\v ift. 



Synonyms — .■Icantliylis sa.vatalis; Cypselus uiclanolciicits; Panyptila mrlatio- 

 Ict'.cn: Micropns viclanoleucns. 



Status — Breeds commonly on rocky clilTs and precipices throughout the 

 state. Kcmains through tlie winter in parts at least of southern and western Ari- 

 zona. 



152. Eugenes fulgens (Swainson). 



RivoLi Hummingbird. 

 Status — A common summer visitant of some of the higher mountains of 

 southeastern Arizona. While apparently most numerous in the Huachuca and 

 Chiricahua mountains, it has been reported from the Santa Ritas, the San Luis 

 Mountains, the Santa Catalinas (one specimen, Rhoads, 1892, p. 117), and 

 Mount Graham (Henshaw, 1875b, p. 379), the latter being probably its northern 

 limit. The vertical breeding range — where the nests are located — is about from 

 5000 to 7000 feet, but the adult males are usually to be found in high Transition, 

 above 8000 feet. 



153. Cyanolaemus clemenciae (Lesson). 



Blue-throated Hujm mingbird. 



Synonym — Cociignia clcinciiciac. 



Status — A rather uncommon summer visitant in the damp shady canons of 

 the mountain ranges of southeastern Arizona. Has beeri found in the Santa Cata- 

 iinp, Santa Rita, Chiricahua, San Luis, and Huachuca mountains. Nests and 

 eggs have been secured in the last mentioned range (see Brenmger, 1903, p. 435; 

 Willard, 191 1, p. 46). 



151. Archilochus alexandri ( Eourcier and Mulsant). 



Bi.ACK-CHINNED HUMAIINGPIRD. 



Synon_\-m — Trocliihis alexandri. 



Status — Very common summer visitant, found generally in foothill country 

 and along wo'rvled streams. Ranges north info the Mogollon Mountains in cen- 

 tral Arizona, where Mearns (1890a, p. 255) found it breeding in the pine belt, 

 casually still farther north: 1 specimen, Keam Canon, July 31 (Fisher, 1903, p. 

 35). Breeds along the Colorado River to the northern boundary of the state. 



155. Calypte costae (Bourcier). 



Costa Hummingbird. 



Synonyms — Sclasphorus costae; Atthis eostae ; Trocliilits costae. 



Statu.s — Common summer visitant of the T^ower Sonoran zone in southern 

 and western Arizona ; reported north to Fort Grant and Tucson in the east, and 

 to Fort Mohave on the Colorado River. A few seem to remain through the win- 

 ter as it has been found both at Bill Williams River ( Baird, 1858, p. 138) and in 

 the extreme southwestern corner of Arizona (Bendire, 1895, p. 202) in Febru- 

 ary. Though found breeding only at low altitudes, it is of common occurrence 

 in the high mountains during the migrations, especially in the late summer : 

 Huachuca Mountains, 5500 feet. July (Swarth. T904b, p. 17). 



