456 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



breast, and abdomen white; a broad black band across chest; sides 

 and flanks olive, or grayish washed with olive; upper parts (except 

 pileum and hindneck) plain olive-green, varying much in shade, some- 

 times brownish or dusky; edge and bend of wing bright yellow; bill 

 light yellowish (orange or orange-red in life), partly dusky in younger 

 birds; iris brown; legs and feet varymg from deep to pale horn 

 brownish. 



Immature. — Similar to adults but colors duller, the median crown- 

 stripe more or less olivaceous, the jugular collar partly brownish, and 

 the white of under parts, etc. , more or less tinged with buff. 



Young. — Uniform sooty olive, paler on throat and abdomen. 



Adult male.— Li%xyg\h (skins), 148.59-167.64 (154.94): wing, 73.66- 

 84.58 (78.49); tail, 58.93-74.17 (67.31); exposed culmen, 14.73-16.51 

 (15.49); depth of bill at base, 8.89-10.92 (9.91); tarsus, 25.40-28.19 

 (27.18); middle toe, 16.51-19.05 (17.53).' 



Adult female.— \i^vLg^ (skins), 137.16-149.86 (144.53); wing, 70.61- 

 75.69 (72.90); tail, 59.69-66.55 (62.48); exposed culmen, 13.97-16.00 

 (15.24); depth of bill at base, 8.64-10.16 (9.14); tarsus, 25.91-27.94 

 (27.18); middle toe, 16.51-18.29 (17.53).' 



' Eleven specimens. 



''■ Nine specimens. 



I am unable to make out any sufficiently well defined geographic variation in this 

 species, and therefore can not recognize Mr. Cherrie's A. u.. saturatus, although the 

 material upon which the supposed subspecies was based (including the type) , together 

 with additional specimens, has been carefully examined. To a certain extent the 

 alleged difference in coloration between specimens from opposite sides of Central 

 America is apparent; but in my opinion it is not sufficiently constant to warrant 

 subspecific separation. Average measurements are as follows: 



Locality. 



Wing. 



Tail. 



Ex- 

 posed 

 culmen. 



Depth 

 of bill 

 at base. 



Tarsus, 



Middle 

 toe. 



MALES. 



Six adult males of A. aurantiirostris (Panama to 

 Costa Rica) 



Five adult males of A. a. "saturatus" (Veragua to 

 Nicaragua) 



FEMALES. 



Four adult females A. avxantiirostris (Panama to 

 Guatemala) 



Five adult females of ^. a. " saturatus ' ' (Costa Rica 

 to Honduras) 



SEX NOT DETERMINED. 



Five unsexed specimens of ^. a. ''saturatus" from 

 Guatemala 



78.99 

 77.98 



73.41 

 73.15 



67.56 

 67.06 



62.74 

 62.48 



15.49 

 15.24 



15.49 

 14.99 



10.16 

 9.65 



9.65 

 9.65 



26.92 

 27.43 



26.67 

 27.43 



27.94 



17.53 

 17.78 



17.53 

 17.27 



As may be seen from the above, Guatemalan specimens average decidedly larger 

 than those from more southern localities, and it is possible that with a good series of 

 specimens, with sex determined and exact locality recorded, the validity of A. a. 

 satnmtun (the type of which is from Choctum, Vera Paz) may be established. 



