80fi 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



yellow, the former usiiall}^ more or less streaked with gray (sometimes 

 reduced to mere shaft-streaks, but usually broad streaks of pale gray 

 inclosing a narrow shaft-line of dusky) ; sides and flanks light yellow 

 next to white of breast and abdomen, passing into oclu-aceous or 

 ochraceoLis-yellow or buff-yellow externally; under tail-coverts vary- 

 ing from white to primrose or pale canary yellow; axillars and under 

 wing-coverts buff-yellow to naples yellow; inner webs of remiges 

 gra^ash, passing into pale grayish Iniff or cinnamon along edges; 

 bill horn color, the mandible and (usually) lower basal portion of 

 maxilla paler; iris brownish red or light reddish brown; legs and feet 

 grayish dusky or dusky horn color in dried skins, bluish gray or 

 grayish blue" in life; length (skins), 161-185 (171); wing, 85-93.5 

 (89.8); tail, 68-77 (72.4); exposed culmen, 22-25.5 (23.1); tarsus, 

 23-25.5 (24.4); middle toe, 15-17 (16.1).« 



Adult female. — Not constantly different in coloration from the 

 male, but sometimes with the chest more uniform pale gray or olive ; ^ 

 length (skins), 155-180 (170); wing, 81.5-87.5 (84.9); tail, 63.5-71.5 

 (67.4); exposed culmen, 21-25 (22.6); tarsus, 22-25.5 (24.5); middle 

 toe, 15-17.5 (16.1).*^ 



a Sixteen specimens. 



6 These differences, which are shown in only two out of a series of ten specimens, 

 are probably purely individual variations and not sexual. 

 c Ten specimens. 



T am puzzled to know whether specimens from the coast district of British Honduras 

 (Manatee Lagoon) should be referred to the southern or northern forms of this species, 

 since they are intermediate, both in coloration and measurements. On the whole 

 they seem to be nearer to A. c. salvini in coloration. 



Specimens from the line of the Panama Railway (the type-district of A. sdateri 

 Lawrence) are as a rule decidedly more olive (less brown above), the whole back being 

 olive, scarcely different -from the color of the pileum and hindneck. No similarly 



