Brewster o)i a Collection of Arizona Birds. 1 39 



40. G-eothlypis macgillivrayi (^ ?/(/.) ^^'''''''^''- Macgilli- 

 VRAv's Warbi.er. — Two specimens collected at Tucson (9 

 April 20, $ June 8). -T have not found it common in either 

 Arizona or New Mexico." 



41. Geothlypis trichas {Linn.) Caban. Maryland 

 Yellow-throat. — Mr. Stephens found this species '"abun- 

 dant along streams." an experience at variance with that record- 

 ed by Mr. TIenshaw. who met with it but twice while in 

 Arizona. 



The only specimen taken ag^rees closelv with some examples from the 

 Truckee River, Nevada, and differs from mj eastern representatives, in 

 having the upper parts jellowish-olive instead of olive-green; the crown- 

 band much broader and creamy white in color; the wings and tail longer; 

 the yellow beneath richer, and extending more over the abdomen. Mr. 

 Ridgway has already called attention* to some of these diffei-ences which, 

 as he now writes me, would be enough to warrant the varietal separation 

 of the western bird, were it not that specimens from both sections of the 

 country occasionally var\- in such a manner as to invalidate any charac- 

 ters that could at present be proposed. With the acquisition of better 

 series, however, it is probable that the representatives of two regions, as 

 yet undefined, will be found to present sufficiently constant characteristics 

 to deserve distinctive names. 



219. $ ad., Cienega Station. April 17. Length, 5.40: extent, 6.90; 

 wing, 2.16; tail, 2.40; culmen. .55. ••Iris brown; bill black, bluish be- 

 neath ; legs pale brown." 



42. Icteria virens longicauda {Lazvr.) Cones. Loxg- 

 TAILED CiLvr. — This bird was observed only in the vicinity of 

 Tucson. The first specimen was taken April 30. and it soon 

 afterwards became abundant. 



310. (J ad.. Tucson. .Vpril 30. Length. 7.50: extent. 9.40: wing, 3.12: 

 tail. T,.s,2. ••Bill and legs black." 

 318, $ ad.. Tucson. .May 3. Length, 7.70; extent. 9.60: wing. 3.05 : 



Length. 7.30: extent. 9.70; wing. 3.12; 



Length. 7.10; extent. 9-4): wing, 3.15: 

 tail. 3.36. 



43. Myiodioctes pusillus pileolatus {Pall.) Ridgw. 



PiLEOLATED VVarBLER. 



Although Mr. Henshaw referred all his Arizona Black-capped Flycatch- 

 ers to pusillus. mine are absolutely typical oi pileolatus: in fact they are 

 brighter than some specimens from Nicasio (California), the yellow below 

 being richer, and the upper surface more yellowish, while the bill is equally 



* Hist. N. A. Birds, Vol. I, 1874, pp. 297-298. 



