628 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



\Myiarchus] nuUingi Sharpe, Hand-list, iii, 1901, 144, part (Arizona). 

 Myiarchus dnerascens nuttingi American Ornithologists' Union Committee, 



Auk, X, Jan., 1893, 60 (check list no. 454a); Check List, 2d ed., 1895, no. 



454a, part (Arizona). — Bendire, Life Hist. N. Am. Birds, ii, 1895, 2G9, pi. 



2, fig. 14 (egg). — SwARTH, Pacific Coast Avifauna, no. 4, 1904, 22 (Huachuca 



Mts., Arizona, breeding). 

 M[yiarchus] dnerascens nuttingi Ridgway, Man. N. Am. Birds, 2d ed., 1896, 334, 



part (Tucson, Arizona). 

 M[yiarchus] c'inerascens] nuttingi Bailey (Florence M.), Handb. lairds W. U. S., 



1902, 253.— CouES, Key N. Am. Birds, 5th ed., i, 1903, 521. 



MYIARCHUS CINERASCENS PERTINAX (Baird). 

 LOWER CALIFORNIA FLYCATCHER. 



Similar to M. c. dnerascens, but color of back, etc., decidedly more 

 olivaceous (light grayish olive or olive-greenish, instead of hair 

 brown)," yellow of under parts averaging slightly deeper; wing and 

 tail averaging shorter and bill larger. 



Adult male.— hength (skins), 182-211 (196); wing, 92-102 (98.3); 

 tail, 88-95.5 (91.1); exposed culmen, 19-21 (19.7); tarsus, 22-23.5 

 (22.8); middle toe, 13-14 (13.4) .& 



Adult female.— hength (skins), 183-205 (192); wing, 88.5-101 

 (93.6); tail, 81.5-93.5 (87); exposed culmen, 17.5-20 (19); tarsus, 

 19.5-23.5 (22.6); middle toe, 11.5-13.5 (13.1).'^ 



Southern Lower California (Cape San Lucas; San Jose del Cabo; 

 Todos Santos; El Potrero; El Cajoncito; La Paz; Santa Anita; 

 Muleje; Pichilinque Bay). 



Myiarchus mcricanus (not Tyrannula mexicana Kaup) Baird, Proc. Ac. Nat. Sci. 



Phila., 1859, 301 (Cape San Lucas), 303 (do., crit.).— Cooper, Orn. Cal., 1870, 



316, 317, part (Cape San Lucas; crit.). 

 M[yiarc}nus] pertinax Baird, Proc. Ac. Nat. Sci. Phila., 1859, 303, in text (Cape 



San Lucas, Lower California; coll. IT. S. Nat. Mus.). 

 Myiarchus incxicanus, var. pertinax Cooper, Orn. Cal., 1870, 317, in text. — Baird, 



Brewer, and Ridgway, Hist. N. Am. Birds, ii, 1874, 337, footnote. 

 Myiarchus dnerascens pertinax Brewster, Bull. Mus. Comp. Zool., xli, 1902, 117 



(full synonymy; crit.). — American Ornithologists' Union Committee, 



Auk, XX, 1903, 342 (check list no. 4546).— Nelson, Proc. Biol. Soc. Wash., 



xvii, 1904, 34 (monogr.). — Kaeding, Condor, vii, 1905, 134 (San Jose del Cabo). 

 Myiarchus dnerascens (not Tyrannula dnerascens Lawrence) Coues, Proc. Ac. Nat. 



Sci. Phila., 1872, 69, 70, part (Cape San Lucas; crit.); Check List, 1873, no. 



248, part.— Coues and Streets, Bull. U. S. Nat. Mus., no. 7, 1877, 12 (Pichi- 



o This difference in coloration of the upper parts very obvious and in the series exam- 

 ined quite constant, when specimens in fresh plumage are compared. The difference 

 in the yellow of the under parts is equally obvious in a majority of the specimens but 

 is not entirely constant. 



b Ten specimens. 



c Eight specimens. 



