Female.—Above blackish brown, slightly glossed with steel-blue, and the feathers with white bases which show through on the neck and back; a white band across rump, some of its feathers with smoky brown shafts and tips; wings and tail blackish brown; lores, subocular line, and ear-coverts smoky brown; under parts white; chin and breast washed with light smoky brown; under tail-coverts smoky brown with darker shafts and white tips. Length, 117; wing, 104; tail, 46; culmen from base, 7; tarsus, 7.
Very little is known concerning the occurrence of the Siberian swallow in the Philippines where it has been found only during migration.
Genus RIPARIA Forster, 1817.
Plumage dull in color, above brownish black or earthy brown; no band across rump and no light spots on the tail which is but slightly forked; tarsi and toes nearly or quite naked.
Species.
- a1. Larger; wing, 95 mm. or more; a small tuft of feathers on back of tarsus at base of hind toe; a dark band across breast. riparia (p. [425])
- a2. Smaller; wing, 90 mm. or less; no tuft of feathers on tarsus; no dark band across breast. chinensis (p. [426])
388. RIPARIA RIPARIA (Linnæus).
BANK SWALLOW.
- Hirundo riparia Linnæus, Syst. Nat. (1758), 1, 192.
- Cotile riparia Sharpe, Cat. Birds Brit. Mus. (1885), 10, 96; Oates, Fauna Brit. Ind. Bds. (1890), 2, 272, fig. 76 (foot).
- Clivicola riparia Sharpe, Hand-List (1901), 3, 189; Oates and Reid, Cat. Birds’ Eggs (1903), 3, 231; McGregor, Bull. Philippine Mus. (1904), 4, 33; McGregor and Worcester, Hand-List (1906), 69.
Calayan (McGregor). Northern America and Asia; Europe, China; in winter to Central and South America, Africa, Indian Peninsula, and Indo-Burmese countries.