10 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



cuneate or deltoid on the breast, tbe posterior lower parts siiEfused 

 with much deeper fulvous, and the tail spots pale isabella-color or brown- 

 ish white, instead of pure white. 



Adult : Above grayish brown, the remiges and tail more brownish ; 

 middle and greater wing-coverts sometimes narrowly tipped with dull 

 white, but these markings occasionally quite obsolete; three or four 

 outer tail-feathers tipped with dull brownish white or pale isabella- 

 color, the spots about .3o-.40 of an inch wide on inner web of lateral 

 feathers, successively much more restricted on the others. Lower parts 

 pale isabella-color, paler on chin and throat, which are nearly white, as 

 is sometimes also the breast and middle of the abdomen, the color grad- 

 ually deepening into brownish ochraceous or fulvous on the flanks, anal 

 region, and crissum. Jugulnm marked with distinct, regularly cuneate 

 or deltoid, spots of grayish brown, like the color of the upper parts; 

 breast and sides marked with roundish, elliptical, or tear-shaped spots 

 of the same, the spots largest on the breast, where sometimes more or 

 less blended. Bill black, the basal portion of the mandible more brown- 

 ish; legs and feet dark brownish. AVing, 4.45-4.70 (4.5(3) ; tail, 5.00-5.20 

 (5.10); culmen, 1.12-1.30 (1.20); bill from nostril, .90-1.15 (1.02); gonys, 

 .70-.S5 (.77); tarsus, 1.40; middle toe, 1.00-1.10 (1.05).* 



Hab. — Coast region of western Mexico, in the vicinity of Tepic and 

 Mazatlan ("common resident"). 



2. MIMUS GILVUS LAWEEXCEI. 



Ch. — Differing from true M. (jiJvus in much longer wing and tail, de- 

 cidedly smaller and slenderer bill, decidedly lighter and browner gray 

 of upper parts, much less distinct light superciliary stri])e, and other 

 details of coloration. From var. (p'ociUs is much less distinctly black 

 wings, with less sharply contrasted light markings, u^iper parts browner, 

 the bill smaller and more slender, etc. 



Adult: Above uniform brownish gray (much as in M. polyglottiis, hut 

 rather browner); wings and tail dusky (not black), the greater coverts 

 and remiges broadly edged with brownish gray (like the back), the mid- 

 dle and greater wing-coverts distinctly tipped with white (forming two 

 uarrow bands), and the extreme base of the primaries white, usually, 

 however, concealed by the i)rimary coverts; three to five outer tail- 

 feathers abruptly tipped with white, this 1.40-1 .65 inches in extent on 

 the outer feather, which has. the outer web mostly or entirely white; 

 the middle rectrices narrowly and indistinctly whitish or pale grayish at 

 extreme tips. A very indistinct paler superciliary stripe, strongly con- 

 trasted only with the dusky lores ; an indistinct dusky jiost-ocular streak ; 

 eyelids pure white. Lower parts dull white, purer on the throat and 

 belly, the jugulnm shaded with pale grayish, the flanks and anal-region, 

 sometimes the crissum also, more or less strongly tinged with buff. Bill, 



^Extreme aud avera'^e lucasmemeiits of 4 adults. 



