216 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



MIMODES GRAYSONI (Lawrence). 

 SOCORRO THRASHER. 



Adults (sexes alike). — Above plain grayish brown (deep broccoli 

 brown), the rump and upper tail-coverts slightly browner ; wings and 

 tail with indistinct paler edgings, the middle and greater wing-coverts 

 narrowly and rather indistinctly tipped with paler; primaries rather 

 distinctly edged with pale gray; under parts soiled white, the sides 

 and flanks streaked with brown or grayish brown; under tail-coverts 

 dull brownish white, streaked or marked with central or mesial areas 

 of grayish brown; lores dusky; auricular region streaked with gray- 

 ish brown and dull brownish white; suborbital and malar regions dull 

 brownish white flecked with grayish brown; sides of chin and throat 

 margined with a more or less distinct submalar streak of dusky gray- 

 ish brown; bill dusky brown or blackish, the mandibular rami more 

 horn colored; legs and feet blackish or blackish brown. 



Young. — Similar to adults, but rather brighter or more rusty brown 

 above ; middle and greater wing-coverts tipped with pale tawny 'or 

 brownish buft"; chest rather sparsely and indistinctly spotted with 

 grayish brown; under tail-coverts light brown. 



Adult male. —Length (skins), 233-25.3 (243); wing, 104-110 (107.2); 

 tail, 110-122 (117.3); exposed culmen, 18-22 (19.9); depth of bill 

 at frontal antise, 7-7.5 (7.3); tarsus, 36-37 (36.6); middle toe, 23." 



Adult female.— Length (skins), 230-255 (243); wing, 99-107 (102.2); 

 tail, 111-120 (115.8); exposed culmen, 19-21 (19.9); depth of bill 

 at frontal antia^, 6-7 (6.7); tarsus, 34-38 (35.6); middle toe, 22-23 

 (22.2).'' 



Island of vSocorro, Revillagigedo group, northwestern Mexico. 



Harporhynchvs graysoni Lawrence, Ann. Lye. Nat. Hist. N. Y., x, Feb. 1, 1871, 1 

 (Socorro I., Revillagigedo group, n. w. Mexico; colL U. S. Nat. Mus.; ex 

 "Baird, MS.")-— Orayson,- Proc. Bost. Soc. N. H., xiv, 1871, 298.— Law- 

 rence, Mem. Bost. Soc. N. H., ii, 1874, 267.— Sal vin and Godman, Biol. 

 Centr.-Am., Aves, i, 1879, 33. — Ridgway, Norn. N. Am. Birds, 1881, no. 

 18.— Sharps, Cat. Birds Brit. Mus., vi, 1881, 3G1. 



M[irnodes] graysoni Ridgway, Man. N. Am. Birds, 1887, 543. 



Mimodes graysoni Townsend (C. H.), Proc. U. S. Nat. Mus., xiii, 1890, 135. — 

 Anthony, Auk, xi, 1898, 317 (song). 



[Mivwdes] graysoni Sharpe, Hand-list, iv, 1903, lOB. 



Genus GALEOSCOPTES Cabanis. 



Dumetella S [?] D [?J W [?], Analyst, v, no. xviii, 1836, 206, in text. (Type, 



D.felivox S. D. W.,="The Cat Thrush of Latham.") 

 Spodesilaura Reichenbach, Av. Syst., Mar., 1850, pi. 53. (Type, Musckapa 



carolinensis Linnseus.) 



a Six spt'cimens. ^ Five specimens. 



