5 2 PACIFIC COAST AVIFAUNA. [No. 4 



almost completely renewed, there is still no sign of the chestnut crown 

 patch of the adult bird. It is rather curious that in all these juveniles 

 the yellowish rump, and upper and lower tail coverts, are nearly or quite 

 as bright as in the adult. 



To sum up, it would seem that on leaving the nest the young bird is 

 in a plumage, grayish-brown above, on the breast and sides, and whitish 

 on throat and abdomen, which is retained but a very short time ; a moult 

 of the lower parts taking place almost immediately, and those parts be- 

 coming a more or less uniform buffy-yellow from the bill to the anal 

 region. A little later the plumage of the upper parts is moulted, and at 

 the same time the buffy breast and abdomen changes to gr.ayish-white 

 with the yellow breast spot. Through the changes the rectrices and re- 

 miges are retained and the bird is now much like the autumnal 

 adult, though lacking the chestnut crown patch, which possibly is not 

 acquired until the following spring. 



Helminthophila rubricapilla gutturalis (Ridgway). Calaveras Warbler. 

 Contrary to my expectations I found the Calaveras to be rather a 

 common migrant in this region, and in the spring at least, occurring in 

 the lowlands as well as in the mountains. The earliest noted .in the 

 Huachucas was on April 6th and the last seen on April 25th ; while about 

 the middle of April I saw several in the willows along the San Pedro 

 River. In the spring they were most abundant in the oaks at the mouths 

 of the canyons, but also occurred up as high as 6560 feet. They re- 

 appeared in the fall on August i8th, and until I left, September 5th, were 

 fairly abundant, but frequented rather different localities than in the 

 spring; for I took none below 5500 feet, and they were most abundant 

 along the divide of the mountain, from 9000 to 10,000 feet, where they 

 fed mostly in the flowers and weeds which had sprung up from the sum- 

 mer rains. Both adults and young were taken at this time, but the old 

 birds seemed to be the most numerous. 



Helminthophila celata (Say). Orange-crowned Warbler. 



On September 2, 1902, I secured a male bird of this species from 

 where it was feeding in some low bushes at an altitude of 9000 feet. The 

 same day I saw several more apparently the same, fluttering in and out 

 of a thick patch of sunflowers, but was unable to get any of them. The 

 one secured is a facsimile of some fall birds I have taken in Southern 

 California, with the head very gray, grayish-white orbital ring, and the 

 lower parts dull greenish yellow, obscurely streaked with grayish. On 

 April 17, 1902, I secured a female in some willows near the San Pedro 

 River which appears to be of this species. Allowing for the greater 

 abrasion of the plumage, it is practically the same as the autumn bird 

 just mentioned. 



Helminthophila celata lutescens Ridgway. Lutescent Warbler. 



Although I found the Lutescen Warbler to be a most abundant 

 migrant in the spring in this region, I took but few specimens which 

 can be considered as typical of the race ; but one or two, in fact, which 

 are as brightly colored as Pacific Coast specimens. The greater part of 

 those secured appear to be intermediate between celata and lutscens, 

 but nearer the latter from which they differ principally in being of duller 

 coloration. 



Although I have seen the species at Tucson in the middle of March, 

 the earliest arrival noted in the Huachuca Mountains was on April 8th ; 

 the last seen on May 5th. 



