T4 



green lustre. Bill in average longer and stouter 



than b" [Middle Carolines]. A. o. anga. - 



(b") Upper parts of adult somewhat duller than a". 

 Bill in average shorter and less stout than a" 



[South Mariannes] A. o. guami. -+ 



(B). Edge of feathers on body sides in adult faintly or not at all 

 tinged with bronzy-green. Exposed culmen nearly always 

 not exceeding 25mm. Depth of bill not exceeding g.5mm. 

 Immature bird without distinct streaks on abdomen [Eastern 



Carolines] A. o. opaca. 



Differential measurements of the subspecies of Aplonis opaca. 



