May, 1908 SOME FALL MIGRATION iSTOTES FROM ARIZONA 111 



Sayornis nigricans. Black Phoebe. One or two observed in the vicinity of 

 Benson, along the San Pedro River, were the only ones seen. 



Sayornis saya. Say Phoebe. Fairly common, both in the Rincons and along 

 the base of the Huachucas. They were in the latter locality when I left, November 

 8, and would doubtless remain there through the winter months. 



Contopus richardsoni. Western Wood Pewee. The only one seen was a single 

 bird noted near the base of the Huachucas on October 29, probably an unusually 

 late date for the species in this region. Mj^ earliest record of a spring arrival in 

 these mountains is May 4 (1903). 



Empidonax difficiiis. Western Flycatcher. An immature female was secured 

 near the mouth of Miller Canyon, in the Huachucas, on October 1. It was the 

 only individual of the species noted on the trip. My earliest spring record for the 

 species is May 18 (1903). 



Empidonax hammondi. Hammond Flycatcher. Two small flycatchers, an 

 adult male and an immature male, were secured in the Huachucas, one at 5000 feet, 

 the other at 5500 feet elevation, which, for the present, at any rate, I feel obliged 

 to refer to this species. When I shot them I had no doubt that they were some- 

 thing else, and it is with considerable hesitation that I now refer them to hammondi. 

 Through the courtesy of Mr. F. S. Daggett and Mr. Joseph Grinnell I was able to 

 get together quite a series of this species, presenting several points of interest but 

 containing nothing to duplicate my two birds. Two specimens collected by Mr. 

 Daggett near Pasadena, California, during the same week in September, represent 

 what are probably the extremes of what Mr. Ridgway designates as the " white- 

 bellied" and the "yellow-bellied" phases of plumage. The first is an extremely 

 light colored bird, grayish above and almost white below; the latter very dark 

 colored, dark brownish olive above, breast buffy olive, and abdomen sulphur yellow. 

 My two birds, absolutely alike in coloration, differ from both these, in that, above 

 and below, they are decidedlj^ greenish, with no trace of olive or olivaceous any- 

 where. The throat is gray; in sharp contrast to the rest of the underparts and the 

 abdomen is yellow. Four specimens of hammondi taken in the Huachucas in 

 September, 1895, are all more or less olivaceous on the back. It is possible that 

 these two birds represent a hitherto undescribed species, but as the differences are 

 all of color, there being apparently none of size or proportions, I hesitate to give 

 them a name. 



They were shot on November 2 and 4, making their appearance after a hard 

 storm, no other Em-pidonaces having been seen for a month. They remained in 

 the topmost branches of the live oaks, kept calling incessantly, and were extremely 

 shy and hard to approach, in all these respects reminding me very much of the 

 little 07-nithion imberbe that is found in this region; and it was with a faint hope 

 that they might belong to that species that I pursued them. The two were the 

 only ones seen. 



Empidonax griseus Brewster. Gray Flycatcher. An immature female taken 

 at the base of the Huachucas on October 1 was the only one of the species observed. 



Pyrocephalus rubineus mexicanus. Vermilion Flycatcher. An adult male 

 seen in the foothills of the Rincon Mountains on September 22 was the only one 

 observed during the trip. 



Otocoris alpestris adusta. Scorched Horned Lark. 



Otocoris alpestris occidentalis. Montezuma Horned I^ark. Horned I^arks 

 were quite abundant on parts of the plains below the Huachuca Mountains, 

 but very irregular in their distribution, there being large areas apparentlv well 

 adapted to their needs where they could not be found at all. Some of the specimens 



