198 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
crit.; Cape St. Lucas). Scrarer, Cat. Amer. Birds, 1862, 17 (Lower Calif.). 
Exuior, Illustr. New and Unfig. N. Amer. Birds, I. 1869, pl. 4 (quotes orig. 
descr.). Cooper, Orn. Cal., 1870, 62, 63 (descr.; crit.; Cape St. Lucas). 
Cougs, Check List, 1873, 18, no. 44; 2d ed., 1882, 30, no.64. Bairp, Brewer, 
and Ripeway, Hist. N. Amer. Birds, I. 1874, 1338, 134, pl. 8, fig. 6 (descr. bird, 
nest, andeggs; crit.; Cape St. Lucas). Jasper, Birds N. Amer., 1878, 151, 
pl. 108, fig. 8 (Cape St. Lucas). Rip@way, Nom. N. Amer. Birds (Bull. 
U.S. Nat. Mus., no. 21), 1881, 14, 61, 74, no. 57; Proc. U. S. Nat. Mus., VI. 
1883, 158, footnote (crit.; S. Lower Calif.). Brtpine, Jbid., V. 1888, 535 
(Cape Region) ; VI. 1888, 345 (Cape Region). A. O. U., Check List, 1886, 
325, no. 714. Bryant, Proc. Calif. Acad. Sci., 2d ser., II. 1889, 315 (Cape 
Region ; San Quintin and_s.); Zoe, II. 1891, 188 (San José del Cabo). 
TOWNSEND, Proc. U. S. Nat. Mus., XIII. 1890, 186 (Cape St. Lucas). 
ALLEN, Auk, X. 1898, 142 (tropical type). ANnTHony, Zoe, IV. 18938, 245 
(San Pedro Martir). 
[Campylorhynchus] affinis Gray, Hand-list, I. 1869, 192, no. 2,652. Couzs, Key N. 
Amer. Birds, 1872, 85 (descr.; Cape St. Lucas). 
C.[ampylorhynchus] affinis Cours, Birds Col. Valley, 1878, 157 (crit.) ; Key N. Amer. 
Birds, 4th ed., 1894, 275 (descr.; Lower Calif.). Brxpine, Proc. U. S. Nat. 
Mus., VI. 1883, 344 (Lower Calif.). 
Campylorhynchus brunneicapillus (not of .LAFRESNAYE) SHARPE, Cat. Birds Brit. 
Mus., VI. 1881, 197, 198 (descr. ; La Paz). 
Heleodytes affinis A. O. U. Comm., Auk, XI. 1894, 48, no. 714. Anruony, Jbid., 
210-214 (crit.) ; XII. 1895, 280 (status). 
Hi [eleodytes] afjinis Ripeway, Man. N. Amer. Birds, 2d ed., 1896, 547 (s. portion 
of Lower Calif.). 
Heleodytes brunneicapillus affinis A. O. U. Comm., Auk, XIV. 1897, 18), no. 713 b. 
[Campylorhynchus] brunneicapillus DuBois, Synop. Avium, fasc. VI. 1901, 420, part 
(Basse-Californie). 
Sexual variations: — The sexes apparently differ only in respect to size, the 
females being usually, but not invariably, smaller than the males. 
Seasonal variations : — Young in juvenal plumage differ from old birds in 
breeding plumage only in having the crown of a darker, duller brown (almost 
slaty brown in some specimens); the light markings of the back rusty white 
and broader, on many of the feathers taking the form of deltoid spots; the 
light markings of the wings, including those of the outer primaries (but not 
of the tail), strongly rusty ; the spotting of the under parts finer and somewhat 
fainter. 
Young (and perhaps old birds also) in autumn differ from spring adults and 
young in juvenal plumage in having the light streaks of the back broader and 
whiter; the flanks, abdomen, anal region, and crissum bright cinnamon or 
ochraceous buff, instead of rusty white. 
Individual variation: — Baird remarked} “a tendency to a whitish spot- 
ting in the ends of the feathers of the cap,” which he regarded as characteristic 
of immature birds, but in the large series before me it occurs quite as fre- 
1 Rev. Amer. Birds, pt. I. 1864, 100. 
