28 



Description. — Head above grayish brown, very slightly olive; the rest 

 of the upper parts, including tail and exposed edges of all wing feathers, 

 dark olive green; ear coverts and region around eye grayish brown, a 

 little lighter than top of head (in many specimens, probably immature, 

 this area has a faint reddish wash) ; chin and throat white with distinct 

 dusky shaft lines, bordered posteriorly by an obscure crecentric, dusky 

 band ; sides of breast and flanks dusky olive green ; breast, abdomen, and 

 under tail coverts yellow; anteriorly paler, but on under tail coverts 

 nearly as rich sulphur yellow as in II. philippinensis ; thighs yellow; 

 edge of wing, under wing coverts, and auxiliaries white, washed with 

 yellow ; inner edge of quills edged with white. Bill black, legs plumbeous 

 blue; nails flesh. Total length, 6 inches; wing, 3.19; tail, 2.60; tarsus, 

 0.83; exposed culmen, 0.60. 



Type. — No. 3485, adult female, Collection Philippine Museum. Cala- 

 yan Island, P. I. Collected October 6, 1903, by R. C. McGregor and 

 A. Celestino. 



In all respects like the male. Total length, 6 inches ; wing, 3.12 ; tail, 

 2.70 ; tarsus, 0.88 ; exposed culmen, 0.56. 



Ten males measure: Wing, 3.11-3.30 (average, 3.19); tail, 2.57-2.81 

 (average, 2.61) ; exposed culmen 0.55-0.63 (average, 0.59) ; tarsus, 

 0.77-0.88 (average, 0.83). 



Ten females measure: Wing 3.00-3.28 (average, 3.14) ; tail, 2.48-2.80 

 (average, 2.60) ; exposed culmen, 0.54-0.62 (average, 0.58) ; tarsus, 

 0.76-0.89 (average, 0.82). 



This well-marked race was perhaps derived from II. philippinensis. 

 The latter species, however, has the entire lower breast, abdomen, and 

 under tail coverts rich sulphur yellow. A comparison with II. albiventris 

 is unnecessary, as that species has the posterior under surface white, 

 with but a faint wash of yellow on under tail coverts. The majority of 

 our specimens, which I take to be slightly immature, have the bill dark 

 brown, the lower mandible a little the lighter. The variation in plumage 

 is slight, consisting in the sides of face and breast band being washed 

 more or less with faint reddish and in a slight variation in the strength 

 of shaft streaks on throat. Some examples have a little more olive on 

 crown and in others the exposed margins of inner primaries are washed 

 with reddish brown, both of which points I take to be signs of slight 

 immaturity. 



This new form was abundant on Calayan and was found in thickets 

 along the beach as well as in the deepest forests. Occasionally seen 

 singly, lint more often in bands of four to six or seven. Numerous 

 specimens were secured without difficulty, as it was quite fearless, passing 

 from the ground or low brush to the high trees and down again with 

 little regard to the collector's presence. It was often killed by mistake, 

 as it had a habit of perching motionless in low, thick brush or on the 

 branch of a tall tree, when its plain colors made it difficult to identify. 



