198 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Fasserculus savanna . . . var. anOihms Coues, Check List, 1873, no. 159«, part. 



Passercidus savanna, var. anUdnus Baird, Brewer, and Ridgway, Hist. N. Am. 

 Birds, i, 1874, 539, part, pi. 24, fig. 10. 



[Passerculus savannal b. anthimis Coues, Birds N. W., 1874, 128, part. 



Pnsserculus sandvicensis anthimis Coues, Check List, 2d ed., 1882, no. 228, part. 



P. \_assercidus'] s. [ayidvicensls'] antkhms Coues, Key N. Am. Birds, 2d ed., 1884, 363, 

 part. 



(?) Passercidus alaudbms (not of Bonaparte?) Heermann, Rep. Pacific R. R. 

 Surv., X, pt. iv, 1859, 49 (Benicia, CaUfornia). 



Passerculus sandvAchensis hryantl Ridgway, Proc. U. S. Nat. Mus., vii, no. 33, 

 Jan. 19, 1885, 517 (Oakland, California; U. S. Nat. Mus.). 



Ammodramns sandwicheasis bryanil Ridgway, Proc. U. S. Nat. Mus., viii, sig. 23, 

 Sept. 2, 1885, 354.— Wichs, The Avifauna, i, 1885, 27 (San Francisco, Cali- 

 fornia; descr. nest and eggs). — American Ornithologists' Union, Check 

 List, 1886, no. 542c. — Fisher, North Am. Fauna, no. 7, 1893, 86 (coast, , 

 Santa Barbara to Carpentaria, Dec). — Swarth, Condor, iii, 1901, 17 (San 

 Pedro, California, Dec. 10). 



A.[mmodrainus'] sandwichensis hryanti Ridgway, Man. N. Am. Birds, 1887, 409. 



Passercidus sandwichensis {not Ember iza sandivichens is Gmelin) Sharpe, Cat. Birds 

 Brit. Mus., xii, 1888, 674, part. 



Ammodramns sandwicliensis brunnescens Butler, Auk, v, July, 1888, 265 (Valley 

 of Mexico, Nov. ; coll. A. W. Butler) . \ 



PASSERCULUS BELDINGI Ridgway. ^ 



BELDING'S MARSH SPARROW. 



Similar to P. sandwichensis hrycuitl^ but still darker in coloration, 

 the under parts more heavily and more extensively streaked with 

 black, the upper parts more olivaceous and more uniform; wing andjl 

 tail averaging shorter, but bill larger; legs and feet darker (grayish 

 brown). 



Adtilts {sexes alllie). — Above olive, streaked with black, the streaks 

 very broad on dorsal region; pileum with an indistinct median lighter 

 narrow stripe; under parts white, or bufiy white, the entire chest, 

 breast, sides, and flanks broadly streaked with black, these streaks, in 

 winter plumage, sufi'used terminally with olive-brownish; under tail-, 

 coverts with concealed dusky wedge-shaped mesial streaks. ll 



Adult 7/m/6>.— Length (skins), 115.32-139.70 (121.71); wing, 61.01- 

 71.63 (67.31); tail, 1:6.99-50.80 (48.77); exposed culmen, 10.41-12.70 

 (11.18); depth of bill at base, 6.60-7.37 (6.86); tarsus, 20. 07-22. :J5 

 (20.83); middle toe, 15.24-15.75 (15.49).^ \ 



Adult female.— hQngt\i (skins), 110.49-139.70(122.68); wing, 60.96-, 

 67.56 (62.99); tail, 42.42-46.48 (43.94); expo.sed culmen, 10.16-11.43] 

 (10.67); depth of bill at base, 5.59-6.60 (6.10); tarsus, 18.29-20.57] 

 (19.81); middle toe, 14.73-15.49 (14.99).'' 



Salt marshes of southern California and Lower California, from^j 

 Santa Barbara to San Quentin Bay and Todos Santos Island. 



^ Seven specimens. - Eight specimens. 



