ALSEONAX. 435 
Genus ALSEONAX Cabanis, 1850. 
The genus Alseonaz is similar to Culicicapa and Hemichelidon, having 
a very broad bill, but the rictal bristles are fewer and shorter than in 
Culicicapa; the first primary is pointed and but little longer than the 
primary-coverts. ‘The sexes are alike in colors, being earthy brown above 
and white below. The species are migratory. 
397. ALSEONAX LATIROSTRIS (Rafiles). 
BROWN FLYCATCHER, 
Muscicapa latirostris RAFFLES, Trans. Linn. Soe. (1822), 13, 312. 
Alseonaz latirostris SHARPE, Cat. Birds Brit. Mus. (1879), 4, 127; Hand- 
List (1901), 3, 206; Oatrs, Fauna Brit. Ind. Bds. (1890), 2, 35, 
fig. 14 (bill); Oates and Rem, Cat. Birds’ Eggs (1903), 3, 251; 
McGrecor and Worcester, Hand-List (1906), 71. 
Butalis latirostris TWEEDDALE, Proe. Zool. Soe. (1878), 284. 
Bongao (*); Negros (Hverett); Sulu (*). Ceylon, Indian Peninsula, Burmese 
provinces, Greater Sunda Islands, Moluccas, eastern Siberia, Japan, China. 
“Coloration.—Upper plumage ashy brown, the feathers of the crown 
with darker centers; tail dark brown, the outer feathers very narrowly 
tipped with whitish; wings and coverts dark brown, all but the prima- 
ries broadly edged with ashy white; lores and a ring of feathers round 
the eye white; sides of head brown; lower plumage white, tinged with. 
ashy on the breast and sides of the body. 
“The young have the crown blackish, streaked with fulvous; the 
upper plumage and wings with large terminal fulvous spots; the lower 
plumage like that of the adult but mottled with brown. After the 
autumn molt and till the following spring the young are very rufous. 
“Bill black, the base of the lower mandible yellow; mouth orange; 
iris brown; legs and claws black. The young bird has the whole bill 
yellow except the tip, which is dusky. Length rather more than 127; 
tail, 51; wing, 71; tarsus, 13; bill from gape, 18.” (Oates.) 
“Young.—Differs from the adult in being flammulated above, the 
feathers having large ovate spots of ochraceous buff in their centers, the 
wing-coverts and quills being edged with rufous-buff; sides of face light 
brown, streaked with buff; under surface of body white, mottled with 
dusky brown edgings to the feathers; upper tail-coverts and edges to 
the tail-feathers rufous. 
“Observation.—Considerable variation takes place in this species, but 
only as regards the color of the brown upper surface, which differs in 
intensity, and as regards the brown on the chest; this varies in extent, 
being sometimes broad, sometimes narrow, and occasionally dissolved 
* The islands of Bongao and Sulu are given here on the authority of Sharpe’s 
Hand-List. 
