'iS<S J Antiionv, Ai'ifniDKi of tUc Revillairigedo hltuids. IJI 



78. Certhia familiaris montana. Rocky Mountain Creeper. — Fairly 

 coinniou up to 10,000 feet, breeding between 7,000 and 9,000, occasionally 

 up to timber line. 



79. Sitta carolinensis aculeata. Si.icNDER-ini.i.En Nuthatch. — Abun- 

 dant. IJrceds commonly in pines from 9,000 feet down to 7,000. 



80. Sitta pygmsea. Pigmy Nuthatch. — Abundant. The only really 

 common bird during the winter months. They go up to 9,000 feet to 

 breed and come much lower during the winter. 



81. Parus gambeli. Mountain Chickadee. — Common. Breeds in 

 May and June, from 9,000 feet up to timber line. 



82. Myadestes townsendii. Townsend's Solitaire. — Rare. Took 

 a nest with four fresh eggs on June 7, at an altitude of nearly 10,000 feet. 



83. Merula migratoria propinqua. Western Robin. — Abundant. 

 Arrives the latter part of February, breeding in April, May and June, 

 ac ording to altitude. Common up to 10,000 feet. 



r|. Sialia mexicana bairdi. Chestnut-backed Bluebird. — Fairly 

 ccmmon up to 12,000 feet. Breeds up to nearly 10,000 feet during May 

 nndjune. Nests usually in deserted Woodpecker's holes or in hollow 

 stumps. 



85. Sialia arctica. Mountain Bluebird. — Common. Arrives early 

 ill February, breeding in May up to 9,000 feet. 



AVIFAUNA OF THE REVILLAGIGEDO ISLANDS. 



BY A. W. ANTHONY. 



During the past summer (1897) a little over a month was 

 spent in exploring the Revillagigedo Islands, lying to the south- 

 west of Cape St. Lucas, Lower California, and as very little is 

 known of the birds of this region I have thought it worth while 

 to -put on record my notes taken while there. 



Socorro Island, the largest of the group, lies about 240 miles 

 southwest of Cape St. Lucas and about 285 miles to the westward 

 of Maria Madre, the largest of the Tres Marias group, off San 

 Bias. 



Clarion Island lies approximately 200 miles to the westward of 

 Socorro and somewhat further south, while San Benedicte is but 

 35 miles north of Socorro. Rocca Partida (Divided Rock) is 



