246 Birds of San Pedro Martir. [zoE 



Sitta carolinensis aculeata SlEnder-billed Nuthatch. 

 Rather rare but well distributed in the pines. 



Sitta pygmcEa leuco7iiicha. White-naped Nuthatch. The 

 most abundant species on the mountain; found everywhere in the 

 pines. Upon our arrival May 5 this species was mating; noisy 

 little companies of five or six to a dozen were seen chasing one 

 another through the pines, chattering and calling from daylight 

 till dark; although dozens of nests were discovered all were 

 practically inaccessible. A favorite location for the burrow was 

 on the under side of a dead branch, well away from the trunk of 

 a large pine, and from twenty-five to a hundred feet from the 

 ground. A series of over one hundred and thirty skins sustain 

 the characteristics of the types to a very gratifying degree. 



Panis inornatiis griseus. Gray Titmouse. Seen in several 

 localities on San Pedro but not at all common. Specimens from 

 the base of the range were identified as griseus, but as I have 

 no specimens from the pine belt I can only surmise its identity. 



Parus garnbeli. Mountain Chickadee- Abundant in the 

 pines but found chiefly in the region of Manzanita and oak 

 thickets. In winter it was seen about Valladares and along the 

 lower valleys. 



ChamcEa fasciata henshawi. Palijd Wren-Tit. Common 

 along the lower slopes of the mountain and not rare in the 

 highest altitudes where it nests in the shrub oak and Manzanita. 



Psaltriparus minimus cali/ortiicus. Caifornia Bush-Tit. 

 Not common in the pines, but noted from sev^eral localities; very 

 abundant below 3000 feet. 



Regulus calendula. Ruby-crowned Kinglet. Rather com- 

 mon during migrations. 



Turdils ustulatus. Russet-backed Thrush. Seen in the 

 pines as late as May 25; a female taken May 21; it is possibly 

 a resident of the pines, but those taken showed little enlarge- 

 ment of the ovaries, and it is more probable that they were belated 

 migrants. 



Merula migratoria propinqua. Western Robin. Common 

 along the base of the mountain in winter ; a few were seen in 

 May, 1S89, at I,a Grulla, but none were noted the past season. 



