Dicæum sibuyanicum Bourns and Worcester, Minnesota
Acad. Nat. Sci. Occ. Papers (1894), 1, 18; McGregor,
Bur. Govt. Laboratories (1905), 25, 18; McGregor and Worcester,
Hand-List (1906), 96.
Sibuyan (Bourns & Worcester, McGregor).
Male.--Similar to the male of D. intermedium, but the rump more
heavily washed with olive-green; chin and throat clear ashy gray
without the yellow wash. Iris brown; bill black; legs and nails
dark steel-blue. Wing, 56; tail, 26; culmen from base, 14; bill from
nostril, 9; tarsus, 14.
Female.--Similar to the female of D. intermedium. Wing, 52; tail,
24; culmen from base, 13; bill from nostril, 9; tarsus, 14.
"Average measurements from nine males: Length, 99; culmen, 15; wing,
53; tail, 26; tarsus, 13. From two females: Length, 97; culmen, 15;
wing, 50; tail, 24.6; tarsus, 14." (Bourns and Worcester.)