Volvocivora mindanensis Tweeddale, Proc. Zool. Soc. (1878), 947.
Edoliisoma mindanense Sharpe, Cat. Birds Brit. Mus. (1879), 4,
470; Hand-List (1901), 3, 297; McGregor and Worcester, Hand-List
(1906), 77.
Basilan (Steere Exp., Bourns & Worcester, McGregor); Mindanao
(Everett).
Male.--Above bluish gray, becoming lighter on lower back,
and pearl-gray on rump and tail-feathers; frontal band, lores,
sides of face to above eyes, chin, throat, and fore breast glossy
black; rest of under parts slate-gray; wings and tail mostly black;
secondaries and wing-coverts broadly edged with ashy gray; a few of
the primaries narrowly edged with ashy gray; two middle rectrices gray
for three-fourths of their length and some of the outer ones tipped
with gray. Length, about 230; wing, 122; tail, 100; culmen from base,
21; bill from nostril, 16; tarsus, 21.
Female.--Wings and tail as in the male, remaining plumage ashy gray
or light slate-gray, becoming delicate pearl-gray on rump, abdomen,
and upper and under tail-coverts. Iris dark brown; bill, legs, and
nails black. Wing, 117; tail, 92; culmen from base, 21; bill from
nostril, 16; tarsus, 22.
"Average length of three males, 218; wing, 115; tail, 92; culmen, 25;
tarsus, 21; middle toe with claw, 22. Two females, length, 227; wing,
115; tail, 91; culmen, 24; tarsus, 23; middle toe with claw, 22. Iris,
bill, legs, and nails black; food fruit and seeds in the individuals
examined. This species is very similar to E. everetti." (Bourns and
Worcester MS.)