one of the islands of Ruk group Middle Carolines. 

 Habitat. — Caroline Is.: Ruk, Wolea or Ulie. 



3. A. opaca giiavii Momiyama, subsp. nov. Type loc. Guam, 

 Mariannes. 



Habitat. — Marianne Is.: Guam, the subspecies is probably 

 peculiar to the island. 



4. A. opaca hartcrti Momiyama, subsp. nov. Type loc. Saipan, 

 Marianne Is. 



Habitat. — Marianne Is.: Saipan. 



5. A. opaca kiirodai Momiyama. lype loc. Main island of 

 Yap, Western Carolines. 



Habitat. — Caroline Is.: Yap. 



6. A. opaca, subsp. nov. 



Habitat. — Pelew Is.: Main island of Pelew and Angaur. 



Very similar to A. o. ai?j^a, bui the bronzy-green lustre on both sides of body stronger. 

 In the immature, the under-parts show distinct streaks as the same stage of A. 0. anga 

 do. 



Key to the subspiecies (excluding the no. 6). 

 (A). Edge of feathers on body sides in adul distinctly tinged with 

 bronzy-green lustre. 



(a). Exposed culnien nearly always exceeding 25mm. (with 

 rare exceptions). Immature bird without distinct streaks 



on abdomen [Western Carolines] A. 0. kurodai. — 



(b . Exposed culmen nearly always not exceeding 25mm. 

 Immature with very distinct streaks on abdomen. 

 (a') Bill rather thicker than b', not rarely exceeding 10 



mm. [Middle Mariannes]. — • A. o hartcrti. -4- 



(b') Bill rather less thick than a', not exceeding 9.5mm. 

 (a"j Upper parts of adult with very distinct bronzy- 



~f- 



