4l6 BIRDS OF THE REPUBLIC OF PANAMA — PART 2 



primary coverts black, with the outer primaries edged narrowly 

 with white ; lower foreneck and upper breast metallic blue to violet- 

 blue, bordered posteriorly by a narrow band of black, in which some 

 of the lower feathers are tipped lightly with yellow; rest of lower 

 surface and lateral tufts on either side of rump orange-yellow ; under 

 wing coverts slate-black edged with grayish white or gray ; proximal 

 base of primaries and secondaries white ; tibia black. 



Adult female, above, including the lesser wing coverts, side of 

 head and upper breast slate color, blacker on the crown ; three 

 central pairs of rectrices slate, tipped with black ; three outer pairs 

 black, tipped and barred on the outer web broadly with white; a 

 white spot immediately before and behind eye ; wings black, the 

 longer primaries edged narrowly with white ; outer webs of secon- 

 daries and greater and middle coverts black, barred very narrowly 

 with white; sides somewhat brownish gray; rest of lower surface 

 and lateral tufts on side of rump orange-yellow, usually slightly 

 paler than in the male, with an indefinite white bar where the yel- 

 low meets the slate of the breast; underside of base of primaries 

 and secondaries white ; under wing coverts slate gray ; tibia black. 



Immature male, for a period while attaining adult plumage, may 

 show slate feathers mixed with the blue on the lower breast. 



The orange-yellow of the under surface in both sexes fades as speci- 

 mens age, even in closed museum cabinets, those in the National Mu- 

 seum collection secured in Panama by W. W. Brown, Jr., in 1900, 

 and by E. A. Goldman in 1911, being much paler than those that I 

 have collected between 1950 and 1964. Two in my series dated 1946 

 and 1949 are now (1966) appreciably lighter than the others. In some 

 males, especially in immature individuals, the lower breast changes 

 to grayish blue. 



An adult male, collected February 17, 1961, near the Peluca Hydro- 

 graphic Station on the Rio Boqueron, had the iris dark brown ; thick- 

 ened rim of the bare eyelids honey yellow; bill pale greenish gray; 

 toes dark neutral gray ; claws dusky neutral gray. Another male, Feb- 

 ruary 5, 1962, from El Llano, Panama, had the iris warm brown ; rim 

 of eyelids bright yellow ; bill pale neutral gray ; toes dull neutral gray ; 

 claws black. 



Measurements. — Males (23 from Panama), wing 108.2-117.8 

 (113.0), tail 112.0-124.0 (117.7), culmen from base 16.0-18.4 (17.2), 

 tarsus 12.8-14.0 (13.4) mm. 



Females (11 from Panama), wing 110.7-116.7 (113.7), tail 113.0- 



