BIRDS OF NORTH AND MIDDLE AMERICA 569 



Juvenal, tawny phase (sexes alike). — Similar to the juvenal of the 

 light phase, but the scapulars and remiges and median and greater 

 upper wing coverts barred with pinkish buff, the lesser ones margined 

 with the same; underparts as in light phase, but seldom pure whitish 

 (although young of the light phase are often more buffy than the 

 whitest of the young tawny phase birds). 



Juvenal, dark phase. — None seen, but described by Gurney (Ibis, 

 1879, 173) as follows: "The entire upper surface is of a uniform and 

 unbroken dark brown, with the following exceptions, viz.: a slightly 

 darker shade of brown on the nape; a few indistinct fulvous-brown 

 spots on both webs of the greater wing coverts, bastard wing and 

 tertials, those on the inner webs of the feathers being paler than those 

 on the outer web; similar but larger spots, assuming the character of 

 transverse bars, on both webs of the primaries and secondaries; and 

 white spots on both webs of the feathers of the upper tail coverts, 

 taking the form in those next the tail of three transverse white bars, 

 divided by the dark shaft of the feathers, the spots on the feathers 

 next the rump being smaller and tinged with fulvous. 



"The tail is of a somewhat darker brown than the back, with four 

 white transverse bands, divided by the dark shafts of the feathers, 

 and also narrowly tipped with white, the lateral rectrices with a con- 

 cealed white bar near the base. 



"The chin, throat, and upper breast are of a whole-coloured dark 

 brown, of a similar hue to the nape; the lower breast, abdomen, 

 flanks, and thighs of the same brown tint, but with each feather 

 exhibiting two or three pairs of lateral spots and a narrow tip, all of 

 which are white, with more or less of an ochraceous tinge; the under 

 tail coverts are similar, but with the white spots larger and broad- 

 ened into transverse bars; the under wing coverts are a whole-coloured 

 dark brown, like the breast, except the lowest feathers, which exhibit 

 white spots in pairs; the undersides of the quill feathers of the wing 

 are of a similar, but duller brown, transversely and more or less regu- 

 larly barred with black. 



"The bill is slaty black, slightly mottled with du'ty white about 

 the edges of both mandibles. 



"The tarsi and feet are olive-brown, with a tinge of yellow towards 

 the extremities of the toes." 



Natal down. — Not described. 



Adult male.— Wing 256-275 (263. 7); tail 260-300 (269. 9); culmen 

 from cere 20-23. 5 (22. 1); tarsus 82-87 (84.2); middle toe without 

 claw 43-47 (45. 4 mm.). ^'^ 



Adult fem ale. —Wing 265-285 (273. 1); tail 270-300 (280. 9); culmen 



«" Eleven specimens from Mexico, Honduras, British Honduras, Costa Rica, 

 and Colombia. 



