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586 | MANUAL OF PHILIPPINE BIRDS. 
Bill acrocephaline; upper mandible dark brown, under mandible pale; 
legs, feet, and claws brown; third and fourth primaries longest; second 
primary usually intermediate gent between the sixth and fifth, 
sometimes slightly shorter than” the sixth; bastard [first] primary 
measuring 12.7 to 15.2 mm. Length of wing, male, 72.1 to 68.5; female, 
68.5 to 66; tail, male, 53.3 to 49.5; female, 49.5 to 45.7; culmen, 12.9 
to 13.9; tarsus, 20.3. 
“The changes of plumage in this species are similar to those of the 
preceding species, but at all seasons of the year the general color of 
the under parts is much paler in color in P. borealis (Blasius). The 
smaller size and smaller first primary of the latter species serve, however, 
to distinguish even birds of the year from the present species, though 
they approach each other very closely.” (Swinhoe.) 
The yellow willow warbler is undoubtedly much rarer in the Philip- 
pines than the next preceding species, but upon a careful examination of 
available material I find it necessary to refer to this species a number of 
specimens which were previously recorded as A. borealis. These changes 
will be found in the list of — under each species. 
570. ACANTHOPNEUSTE LUGUBRIS (Blyth). 
MOURNING WILLOW WARBLER, 
Phyllopneuste lugubris Buyru, Ann. & Mag. Nat. Hist. (1843), 12, 98. 
Phylloscopus lugubris SrEBoum, Cat. Birds Brit. Mus. (1881), 5, 48. 
Acanthopneuste lugubris SHarpPE, Hand-List (1903), 4, 217; McGrercor 
and WorcEsTER, Hand-List (1906), 90. 
Basilan (Steere Exp.); Mindanao (Steere); Samar (Steere Hap.). Western 
China to Chuan-che, eastern Himalayas; in winter to eastern Bengal and 
Burmese provinces. 
“Coloration.—Very similar to A. magnirostris, but rather darker and 
smaller, and differing also in the proportions of the primaries. Upper 
mandible dark brown, lower one yellowish, somewhat dusky on the 
terminal half; iris brown; mouth yellow; legs brown; claws horn-color. 
Length, 127; tail, 53; wing, 66; tarsus, 19; bill from gape, 15.7; the 
second primary is intermediate in length between the ninth and tenth, 
and sometimes equals the tenth; the first primary is very long, being 
sometimes 20.3 mm. in length.” (Oates.) 
I have not seen a full description of this species; it is usually compared 
with A. magnirostris, but its very long first primary would seem to be a 
character sufficient to prevent its being mistaken for either of the other 
species found in the Philippine Islands. 
Genus HORORNIS Hodgson, 1845. 
Bill short and stout with a small notch near the tip; rictal bristles few 
and well developed, a few short bristles in front of them; some feathers of 
forehead and chin with long bristle-like shafts; wing moderate to short, 
