62 PACIFIC COAST AVIFAUNA. [No. 4 



Baeolophus wollweberi (Bonaparte). Bridled Titmouse. 



This, one of the characteristic birds of the mountains of Southern 

 Arizona, is found in the greatest abundance everywhere in the oak re- 

 gions of the Huachucas, breeding occasionally up to 7000 feet, but most 

 abundant below 6000 feet. On one occasion, late in the summer, T saw 

 a Bridled Titmouse in a flock of Lead-colored Bush Tits on the divide 

 of the mountains at about 8500- feet, but it is very unusual to see the spe- 

 cies at such an altitude. In February and March they were in small 

 flocks of from twelve to fifteen birds, and about the middle of March 

 they began to pair off, though one or two small flocks were still seen 

 during the first week in April. Early in June young birds began to ap- 

 pear, and soon the broods, attended by their parents, were seen every- 

 where in the oaks. The young are essentially like the adults as to the 

 markings about the head, but duller colored and with the black of the 

 throat more or less obscured by grayish. About the middle of July the 

 adults commence to moult, the new plumage being entirely acquired by 

 about the first of September. Adults in fresh autumnal plumage are 

 more olivaceous on the dorsum and rump than are spring specimens, 

 which are usually of a more uniform grayish cast throughout. At the 

 end of August they were gathered in rather larger flocks than I have 

 seen them in at other times, sometimes as many as twenty or twenty-five 

 being seen together. 



Psaltriparus plumbeus Baird. Lead-colored Bush-Tit. 



T found this species in the Huachucas in February, though not as 

 abundant as it was later on, nor did I see any in the higher parts of the 

 range until later in the spring. During the summer it seems to be 

 equally distributed over all parts of the mountains, from the highest 

 peaks down to the groves of live oaks on the plains immediately below 

 the mountains. About the middle of March the birds commenced to 

 pair off, and I found one nest about half finished on March 26th. The 

 earliest nests found were all in the lower foothill regions, built mostly in 

 scrub oak and small juniper trees, usually not over eight or ten feet 

 from the ground; but later in the season they nest abundantly in the 

 higher altitudes, sometimes high up in the pine trees. I saw one nest 

 at the very top of a tall pine, but the tree was growing on a steep hill 

 side, and the nest was about on a level with the trail from which I saw it. 

 Of the spring specimens collected, the majority had bright yellowish- 

 white eyes ; but in about a third of either sex the iris was brown ; several 

 of the adults have the flanks decidedly tinged with vinaceous. I took 

 no specimens that could be referred to Itoyd'i though several juveniles, 

 undoubtedlv plumbeus, have some slight indication of a duskv line over 

 the auriculars ; and one young female has a fairly distinct, though nar- 

 row, black line or collar across the hind neck. 



Auriparus flaviceps (Sundevall). Verdin. 



Though the Verdin is exceedingly abundant along the San Pedro 

 River and everywhere in the lowlands it but very rarely ventures up into 

 the mountains, and I have seen it in the Huachucas but once or twice, 

 and then only in the foothills. I have seen one or two old nests. in some 

 of the canyons so it sometimes breeds in the mountains, though prob- 

 ably very rarely. 



Regulus calendula (Linnaeus). Ruby-crowned Kinglet. 



A common migrant and probably a winter resident. I saw a few 

 in February, but they did not become abundant until about the middle 



