BREWSTER: BIRDS OF THE CAPE REGION, LOWER CALIFORNIA. 159 
Ammodramus rostratus guttatus (Lawr.). 
St. Lucas SPARROW. 
Passerculus guttatus LAwRENCcF, Ann. Lye. Nat. Hist. N. Y., VIII. 1867, 473 (orig. 
descr. ; type from San José). Cooper, Orn. Cal., 1870, 185 (descr. ; crit. ; 
figures head; San José). Bairp, Brewer, and Ripeway, Hist. N. Amer. 
Birds, I. 1874, pl. 25, fig. 1. Rip@way, Nom. N. Amer. Birds (Bull. U.S. 
Nat. Mus., no. 21), 1881, 23, 68, 74, no. 195; Proc. U.S. Nat. Mus., III. 1880, 
2 (crit.); VI. 1883, 158, footnote (‘‘ doubtful”; crit.; S. Lower Calif.). 
Cougs, Check List, 2d ed., 1882, 52, no. 281. 
[Zonotrichia] guttata Gray, Hand-list, II. 1870, 95, no. 7,413. 
[Passerculus] guttatus Cours, Key N. Amer. Birds, 1872, 136 (descr. ; San José). 
Passerculus rostratus, var. guttatus Cours, Check List, 1878, 33, no. 160a. Bairp, 
Brewer, and Ripeway, Hist. N. Amer. Birds, I. 1874, 544, pl. 25, fig. 1 
(crit.; Cape St. Lucas). Jasper, Birds N. Amer., 1878, 154, pl. 104, fig. 14 
(San José). 
P.[asserculus| guttatus RipGway, Proc. U. S. Nat. Mus., V. 1888, 587-539 (crit. ; 
San José del Cabo). Sanvin and Gopman, Biol. Centr.-Amer., Aves, I. 
1886, 382 (crit.). Cours, Key N. Amer. Birds, 4th ed., 1894, 364 (descr. ; 
Cape St. Lucas). 
Ammodramus rostratus guttatus Ripeway, Proc. U. S. Nat. Mus., VIII. 1885, 355. 
A. O.U., Check List, 1886, 267, no. 544a. Bryant, Proc. Calif. Acad. Sci., 
2d ser., II. 1889, 299 (measurements of type; San José del Cabo; Santa 
Margarita Island). 
Passerculus rostratus Suarre, Cat. Birds Brit. Mus., XII. 1888, 680, 681, part 
(Cape St. Lucas). : 
A.[mmodramus] rostratus guttatus Ripegway, Man. N. Amer. Birds, 2d ed, 1896, 
410 (descr.; vicinity of Cape St. Lucas). 
Ammodramus halophilus McGrecor, Auk, XV. 1898, 265-267 (orig. descr.; type 
from Abreojos Point; descr. nest and eggs). 
Passerculus rostratus halophilus RipGway, Birds N. and Midd. Amer., pt. I. 1901, 
202 (descr. ; Abreojos Point). 
[Passerculus] rostratus Dusois, Synop. Avium, fase. IX. 1901, 631, part. 
Passerculus rostratus guttatus RipGway, Birds N. and Midd. Amer., pt. I. 1901, 201, 
202 (descr. ; San José del Cabo). 
Under the name Ammodramus halophilus Mr. R. C. McGregor has character- 
ized a bird which he found breeding at Abreojos Point, Lower California, as 
“most closely related to A. rostratus guttatus, but ‘ uniformly larger and much 
darker; upper parts decidedly olivaceous instead of olive grayish.’” The in- 
cluded quotation was taken by Mr. McGregor from a letter written by Mr. Ridg- 
way, who has since adopted the form as a subspecies in his Birds of North and 
Middle America, while it has been similarly recognized in the Tenth Supple- 
ment to the A. O. U. Check List. 
It does not seem to me justifiable, however, to regard halophilus as distinct 
from guttatus until we have learned where the latter breeds, and especially 
