172 CATALOGUE OF MEXICAN ANIMALS. 



ondaries with a broad terminal bar of the same ; general plumage much 

 less fulvous ; cheeks streaked with dusky, and lower basal angle of the 

 maxilla destitute of any black spot. 



Adult S (type, No. 215, collection of the Comision Geografico Ex- 

 ploradora de Mexico. Laguna del Rosario, Tlaxcala, Mexico, October, 

 1884): Pileum nearly uniform dusky brown, the feathers narrowly 

 edged, however, with dull buft", especially on forehead and sides of crown, 

 and with glossy black shaft-streaks ; this dusky color of the pileum 

 continued as a narrow, well defined, lighter brown stripe down the middle 

 of the cervix. Rest of head and neck light dull bull', the anterior por- 

 tion of the lores (extending back nearly half an inch from the base of 

 the bill), the chin, malar region, and entire throat, entirely immaculate ; 

 other portions narrowly streaked with dusky, these streaks sparser and 

 smaller in a well-defined superciliary stripe and in a stripe immediately 

 beneath a very distinct dusky post-ocular stripe, the latter being con- 

 tinued in front of the eye as a broader stripe along the upper border of 

 the lores. Prevailing color of the rest of the plumage dark sooty brown, 

 but this broken by distinct buff borders or edgings to all the feathers, 

 including the lesser and middle wing-coverts, and tertials. Greater wing- 

 coverts brownish gray, broadly tipped with deep black, and crossed by a 

 narrower subterminal band of white ; secondaries metallic bluish green, 

 with a distinct terminal band of pure white, and a broader subterminal 

 one of deep black. Priparies and their coverts slaty brown. Rectrices 

 dusky brown, edged with buff, each marked with a longitudinal stripe 

 of decider buff on the outer web and an obliquely transverse bar of the 

 /Same on the inner web. Bill olive-yellow, darker on culmen, the nail 

 and basal portion of culmen blackish brown ; iris dark brown ; legs and 

 feet deep orange.* Wing, 10.00; tail, 4.00; culmen, 2.05; width of bill 

 near end, .90, at base, .80 ; tarsus, 1.60 ; middle toe, 1.95. 



Immature ? (collection of the Comision Geografico Exploradora de 

 Mexico, San Ysidro, Puebla, March, 1884): Very similar to the adult 

 male, but pileum more distinctly streaked, cervix also streaked, and 

 duskj' streaks or stripes on lower parts narrower, the ochraceous pre- 

 vailing on the under surface; white band across greater wing-coverts 

 much obscured by grayish mottling, the black terminal band much 

 less intensely black. Wing, 8.90; tail, 3.80 (much worn at tip); cul- 

 men, 1.85; width of bill near end, .75; at base, .08. 



This fine new species is respectfully dedicated to Professor Augustin 

 Diaz, C. E., director of the Geographical Exploring Commission of 

 Mexico, under whose intelligent direction the exceedingly beautiful 

 collection, of which the type specimens form part, was formed. 



Anas diazi is probably the same species as that which Col. A. J. 

 Grayson identified as Anas ohscura, Gm., and which is mentioned by 



* Colors as represented by the taxidermist, and believed to correctly represent those 

 of the living or freshly killed sijecimen. 



