194 University of California Publications in Zoology [Vol.12 



seen daily. The species was thus well represented as a migrant 

 through the region. 



Twelve specimens were taken, nos. 13551-13562. No. 13522, an 

 adult male, shows conspicuously a character not mentioned in text 

 descriptions, namely, a mixture of long, fine, black hairs (filoplumes) 

 in plumage of sides and especially the flanks. Examination of appro- 

 priate series of specimens shows this character to be possessed in 

 varying degrees, even in female first-winter plumage, by both Vermi- 

 vora ruficapilla gutturalis and V. r. ruficapilla, but not by other 

 members of the genus. 



Vermivora celata celata (Say) 

 Orange-crowned Warbler 



Apparently the only member of the genus present in the Colorado 

 Valley through the winter. That it does winter here is quite apparent 

 from its being observed by us almost daily during the latter part of 

 February, and early March, whenever we were at work in favorable 

 localities. Later its identity was obscured by the arrival of its close 

 relative. Vermivora celata lutescens, which, as a migrant, outnumbered 

 V. c. celata. 



The orange-crowned warbler was closely confined to the riparian 

 strip, where it foraged singly at a low level in the tangle of under- 

 brush in the willow association, or, less often, in the arrowweed 

 thickets. Its presence was betrayed as a rule through the sharp, 

 single call note. Though usually repeated at not infrequent intervals, 

 this clue was not always alone sufficient for the discernment of the 

 bird, because of the impenetrability of its cover. 



The first bird was seen in the river bottom near Needles, February 

 17. On the 20th, five miles below Needles, a specimen (no. 13574) was 

 secured. Although observed frequently, no more were obtained until 

 April 8, when one (no. 13575) was taken on the Arizona shore, ten 

 miles below Cibola. On the California side, eight miles east of 

 Picacho, another (no. 13576) was taken April 20. And two examples 

 were secured on the same side near Pilot Knob, May 9 and 14 (nos. 

 13577, 13578). 



These five specimens are unequivocally celata, save that one shows 

 a slight but notable aberrancy. This is no. 13577, a male, in which 

 the grayness characteristic of celata pervades the plumage as usual, 



