558 BULLETIN 50^ UNITED STATES NATIONAL MUSEUM. 



Brown, Ibis, 18G8, 420 (Vancouver I.)- — Sumichrast, Mem. Bost. Soc. N. H., 

 i, 1869, 557 (Vera Cruz). — Baird, Brewer, and Ridgway, Hist. N. Am. Birds, 

 ii, 1874,366, pi. 44, fig. 9.— Henshaw, Rep. Orn. Spec. Wheeler's Surv., 1874, 

 126 (Arizona). — Brewer, Proc. U. S. Nat. Mus., ii, 1879, 3 (descr. nest and 

 eggs).— Brewster, Bull. Nutt. Orn. Club, vii, 1882, 206 (Tucson, Arizona; 

 crit. ; descr. nest).— Nutting, Proc. U. S. Nat. Mus., vi, 1883, 384 (Sucuya, 

 Nicaragua). — Hartlaub, Journ. fur Orn., 1883, 267 (Dyathal, Alaska). — 

 Drew, Aulc, ii, 1885, 15 (Colorado, breeding from plains up to 8,000 feet). —^ 

 Ridgway, Orn. 40th Parallel, 1877, 539 (Sacramento, California; localities 

 in Nevada and Utah; habits); Nom. N. Am. Birds, 1881, no. 325. — Ameri- 

 can Ornithologists' Union, Check List, 1886, no. 466. — (?) Nelson, Nat. 

 Hist. Coll. Alaska* 1887, 162, part (Dejiih Valley).— Lloyd, Auk, iv, 1887, 

 193 (Tom Green Co., w. Texas, breeding). — Bendire, Life Hist. N. Am. 

 Birds, ii, 1895, 305, pi. 2, figs. 28, 29 (eggs). 



E[7npido7iax] pusillus Cabanis and Heine, Mus. Hein., ii, 1859, 70 (Mexico). — 

 Coues, Key N. Am. Birds, 2d ed., 1884, 442.— Ridgway, Man. N. Am. Birds, 

 1887, 343. 



[Empidonax] pusillus Sharpe, Hand-list, iii, 1901, 138. 



[Emjyidonax pusilhis] var. pusillus Baird, Brewer, and Ridgway, Hist. N. Am. 

 Birds, ii, 1874, 365. 



[Empidonax traillii.] Var. j>usillus Coues, Key N. Am. Birds, 1872, 175. 



Empidonax traillii . . . var. pusillus Coues, Check List, 1873, no. 257«. 



Empidonax train . . . var. ^wsi^tis Henshaw, Zool. Exp. W. 100th Merid., 1875, 

 356 (localities in Nevada, Utah, Colorado, and Arizona; habits, etc.). 



{Empidonax traillii] b. pusillus Coues, Birds Northwest, 1874, 252. 



Empidonax traillii var. pusillus Ridgway, Bull. Essex Inst., v, Nov., 1873, 172 

 (Salt Lake City, Utah, and Wahsatch Mts., breeding up to 7,000 ft.).— Law- 

 rence, Mem. Bost. Soc. N. H., ii, 1874, 287 (Mazatlan); Bull. U. S. Nat. Mus., 

 no. 4, 1876, 27 (Tehuantepec City). 



Empidonax trailli pusillus Minot, Bull. Nutt. Orn. Club, v, 1880, 231 (Boulder, 

 Colorado; notes).— Coues, Check List, 2d ed., 1882, no. 386. 



[Pyroccphalus] pusillus Gray, Hand-list, i, 1869, 361, no. 5490. 



Empidonax ridgwayi (not of Sclater, 1887?) Allen, Bull. Am. Mus. N. H., xiii, 

 1900, 144 (Bonda, Santa Marta, Colombia). 



EMPIDONAX TRAILLII ALNORUM Brewster. 

 ALDER FLYCATCHER. 



Similar to E. t. traillii, but coIdf of upper parts usiuilly more green- 

 ish olive, with pileum and hindneck usually decidedly grayer, some- 

 times in decided contrast with color of back, etc. ; wing-bands usually 

 much paler, even the anterior one being usually pale olive-buff or 

 olive-whitish; wing and tail averaging longer, but bill decidedly 

 smaller. 



Advlt male.— Length, (skins), 120-145 (133); wing, 64.5-78 (71.8); 

 tail, 54-62.5 (58.4); exposed culmen, 11-13 (12); tarsus, 15.5-17.5 

 (16.8); middle toe, 8.5-10.5 (9.5).« 



o Thirty-five specimens. 



