. 
246 Birds of San Pedro Martir. [ZOE 
Sitta carolinensis aculeata SLENDER-BILLED NUTHATCH. 
Rather rare but well distributed in the pines. 
Sitta pygmea leuconucha, WHITE-NAPED NutTuatcH. 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. 
Parus inornatus griseus. GRay Trtmousk. Seen in several 
localities on San Pedro but not at allcommon. 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 gambeli, 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. 
Chamea fasciata henshawi. Patti WREN-TYT. 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 californicus. CAt¥oRNIA BUSH-TIT. 
Not common in the pines, but noted from several localities; very 
abundant below 3000 feet. 
Regulus calendula. Rupy-crowNep KInNGLET. Rather com- 
mon during migrations. 
Turdus 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. é 
Merula migratoria propingua. WrSTERN Rosin. Common 
along the base of the mountain in Winter; a few were seen in 
May, 1889, at La Grulla, but none were noted the past season. 
