198 bulletin: museum of comparative zoology. 



crit. ; Cape St. Lucas). Sclater, Cat. Amer. Birds, 1862, 17 (Lower Calif.). 



Elliot, Illustr. New and Unfig. N. Amer. Birds, I. 1869, pi. 4 (quotes orig. 



descr.). Cooper, Orn. Cal., 1870, 62, 03 (descr. ; crit.; Cape St. Lucas). 



CouEs, Check List, 1873, 13, no. 44 ; 2d ed., 1882, 30, no. 64. Baird, Brewer, 



and KiDGWAY, Hist. N. Amer. Birds, L 1874, 133, 134, pi. 8, fig. 6 (descr. bird, 



nest, and eggs ; crit. ; Cape St. Lucas). Jaspek, Birds N. Amer., 1878, 151, 



pi. 103, fig. 8 (Cape St. Lucas). Ridgway, Norn. N. Amer. Birds (BuU. 



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.). Belding, Ibid., V. 1883, 535 



(Cape Region) ; VI. 1883, 345 (Cape Region). A. 0. U., Check List, 1886, 



325, no. 714. Bryant, Proc. Calif. Acad. Sci., 2d ser., IL 1889,315 (Cape 



Region ; San Quintin and s.) ; Zee, II. 1891, 188 (San Jose' del Cabo). 



TowNSEND, Proc. U. S. Nat. Mus., XIII. 1890, 136 (Cape St. Lucas). 



Allen, Auk, X. 1893, 142 (tropical type). Anthony, Zoe, IV. 1893, 245 



(San Pedro Martir). 

 [Campi/lorhynchus] affinis Gray, Hand-list, I. 1869, 192, no. 2,652. Codes, Key N. 



Amer. Birds, 1872, 85 (descr.; Cape St. Lucas). 

 C .[ampylorhynchus'] affinis Coues, Birds CoL Valley, 1878, 157 (crit.) ; Key N. Amer. 



Birds, 4th ed., 1894, 275 (descr. ; Lower Calif.). Belding, Proc. U. S. Nat. 



Mus., VI. 1883, 344 (Lower Calif.). 

 C ampylorhynchus brunneicapiUus (not of Lafresnaye) Sharpe, Cat. Birds Brit. 



Mus., VL 1881, 197, 198 (descr. ; La Paz). 

 Heleodytes affinis A. O. U. Comm., Auk, XI. 1894, 48, no. 714. Anthony, Ihid., 



210-214 (crit.) ; XII. 1895, 280 (status). 

 H.[eleodytes] affinis Ridgway, Man. N. Amer. Birds, 2d ed., 1896, 547 (s. portion 



of Lower Calif.). 

 Helfodytes brunneicapiUus affinis A. 0. U. Comm., Auk, XIV. 1897, 131, no. 713b. 

 [Camjii/lorliynchus] brunneicapiUus Dubois, Synop. Avium, fasc. VI. 1901, 420, part 



( Basse-Calif ornie). 



Sexual variations : — The sexes apparently differ only in respect to size, the 

 females being usuall}^ but not invariably, smaller than the males. 



Seasonal variations: — Young in ju venal 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. 



