BIRDS OF NORTH AND MIDDLE AMERICA. 201 



73.66 (70.61); tail, 46.99-53.34 (50.55); exposed culmen, 11.43-12.70 

 (11.43); depth of bill at base, 7.11-8.13 (7.37); tarsus, 21.59-23.86 

 (22.35); middle toe, 16.00-18.03 (17.02).^ 



Aduli fmtale.— Length (skins), 119.38-129.54 (125.48); wing, 65.53- 

 68.33 (66.80); tail, 46.48-50.29 (48.51); exposed culmen, 11.68-12.45 

 (12.19); depth of bill at base, 7.11-7.37 (7.24); tarsus, 19.81-22.35 

 (20.83); middle toe, 15.75-16.51 (16.00).'' 



San Benito Island, Lower California. 



This is merely an insular form of P. TOHtvatuH. The bill averages 

 exactly the same in both forms, both in length of culmen and basal 

 depth. Some specimens are scarely to be distinguished bj^ color, but 

 the average dijfference is ver}^ decided and quite sufficient to separate 

 the two forms subspecificallj^. 



Passerculus guttatua (not of Lawrence) CouEsand Streets, BulL U. S. Nat. Mus., 



no. 7, 1877, 10, excL syn. (San Benito I., Lower California; crit.). 

 Passermlus sanctorum Cones Eidgway, Proc. TJ. S. Kat. Mus., v, sig. 34, Mar. 



21, 1883, 538, in text (San Benito I.; nomen nudmn.'). 

 P-lasserculus'] sanctorum Ridgway, Proc. U. S. Nat. Mus., v, 1883, 538, 539, in 



text (crit.).— CouEs, Key N. Am. Birds, 2d ed., 1884, 364 (San Benito I., 



Lower California; U. S. Nat. Mus.). 

 Ammodramus {PassercLdus) sanctorum CouES, Auk, xiv, Jan., 1897, 92. 

 Ammodramus sanctorum Amehican Ornithologists' Union Committee, Auk, xiv, 



Jan., 1897, 121 (Check List, no. 544.1) .—McGebgoh, Auk, xv, 1898, 264 



(descr. young). 



PASSERCULUS ROSTRATUS GUTTATUS (Lawrence). 

 ST, LTJOAS SPARROW. 



Similar to P. r. rostratics but smaller, with relatively smaller and more 

 slender bill and with the coloration darker; upper parts grayish olive 

 or hair brown, the pileum with narrow streaks of dusky, the back and 

 scapulars with very broad streaks, or longitudinal mesial spots, of 

 dark sepia brown; under parts white, shaded with light hair brown or 

 grayish olive on sides and flanks; sides of throat, chest, sides, and 

 flanks conspicuously streaked, the strealis blackish brown medially 

 (broadly), light hair brown along edges. Length (skins), 123.19-124.46 

 (123.70); wing, 63.50-64.77 (64.01); tail, 47.50-47.75 (47.62); exposed 

 culmen, 11.18; depth of bill at base, 5.59-6.10 (6.84); tarsus, 20.57- 

 21.34 (20.83); middle toe, 14.99-15.75 (15.24).^ 



Southern portion of Lower California (San Jose del Cabo) in winter; 

 breeding range unknown. 



Passerculus guttatus Lawrence, Ann. Lye. Nat. Hist. N. Y., viii. May, 1867, 473 

 (San Jos6 del Cabo, Lower California; IT. S. Kat. Mus. ). — Cooper, Orn.Cal., 

 1870, 185. — Baibd, Bhewbb, and Eidgway, Hist. N. Am. Birds, i, 1874, pi. 25, 



' Five specimens. 

 '' Four specimens. 

 ^Two specimens, one of them an adult male, the other wi,th sex undetermined. 



