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HIRUNDO. 429 
393. HIRUNDO STRIOLATA (Boie). 
MOSQUE SWALLOW, 
Cecropis striolata Botr, Isis (1844), 174. 
Hirundo striolata SHarpr, Cat. Birds Brit. Mus. (1885), 10, 161; Hand- 
List (1901), 3, 196; WuuirErnrap, Ibis (1899), 236 (migration in 
northern Luzon); McGrecor and Worcester, Hand-List (1906), 70; 
McGrecor, Phil. Journ. Sci. (1907), 2, sec. A, 326 (nesting habits). 
Batan (McGregor); Bohol (McGregor); Calayan (McGregor); Camiguin N. 
(McGregor) ; Cebu (McGregor) ; Luzon (Whitehead) ; Masbate (Bourns & Wor- 
cester) ; Mindoro (Porter). Formosa, southern China, Burmese provinces, Java, 
Assam, Flores, Cachar. 
Adult (sexes similar).—Above, except rump, dark steel-blue; loral 
feathers black with gray bases; a more or less triangular patch above 
and behind ear-coverts chestnut, streaked with black, continued forward 
over eye and slightly connected across occiput by fine lines of chestnut; 
feathers of neck and upper back largely white basally, this showing as 
white lines ; under tail-coverts black; remainder of under parts including 
axillars and wing-lining white, or very pale fawn, with conspicuous 
blackish shaft-lines producing a very striking appearance; rump rusty 
chestnut with blackish shaft-lines; tail-coverts, secondaries, and second- 
ary-coverts black, slightly glossed with blue; alula, primary-coverts, pri- 
maries, and rectrices black, slightly glossed with dark green. Bill black; 
legs and nails brown. Length, 190 to 195. A male from Cebu meas- 
ures: Wing, 123; tail, 102; depth of fork, 55; bill from nostril, 6; 
tarsus, 14. A female from Cebu, wing, 120; tail, 93; depth of fork, 46; 
bill from nostril, 6; tarsus, 14. 
Young.—General color pattern as in the adult, but head and back less 
strongly glossed: with blue; chestnut on head and rump much lighter; 
wings and tail dark brown instead of black, and inner secondaries tipped 
with white; lower parts heavily washed with fawn, and shaft-stripes 
shorter, browner, and less sharply defined, very faint or altogether 
- wanting on abdomen and under tail-coverts; axillars, wing-lining, and 
flanks strongly washed with fawn, shaft-lines faint or wanting. 
If the Philippine representatives of the mosque swallow be included 
with H. striolata, as they must be at present, this species has a consider- 
able range but it appears to be very local in occurrence. It may be found 
in numbers in one part of an island and be altogether absent a short 
distance away. It often appears in large flocks and may disappear 
within a few hours. I found it nesting in Bohol Island in May and 
in the Island of Batan during June. The nest is a bottle-shaped struc- 
ture of mud, plastered to a wall in a cave or to a beam beneath a building. 
The eggs are pure white; three from Bohol measure: 22.6 by 14.73 22.3 
by 14.2; 22.8 by 14.7. 
83286——2 
