60 BANGS — ROUGH-WINGED SWALLOWS PES. 
Upper parts nearly uniform dark hair-brown, the head just perceptibly 
darker and the rump very slightly paler; primaries and rectrices pale clove- 
brown; tertials narrowly edged with drab; throat pale grayish hair-brown, 
faintly suffused with pale orange buff; breast and sides hair-brown — slightly 
paler than back; belly and under tail coverts white; the longer under tail 
coverts with dusky shafts and usually, but not always, with small dusky sub- 
terminal markings across the feathers. 
Stelgidopteryx ruficollis serripennis (Aud.) 
Hirundo serripennis Aud., Orn. Biog., Vol. IV, 1838, p. 593- 
Type locality.— South Carolina. 
Geographic distribution.— Northern Mexico and North America. Inter- 
grading with S. rujicollis fulvipennis at the southern part of its range. 
Characters.— Differing from S. rujicollis fulvipennis in having the upper 
parts paler brown, the tertials less noticeably edged with drab, and the throat 
clear grayish brown without trace of orange buff. 
Upper parts pale hair-brown, the head hardly darker, the rump just per- 
ceptibly lighter; primaries and rectrices pale clove-brown; tertials not edged 
with drab, though the edges are slightly paler than the rest of the feather; 
throat clear, pale, grayish hair-brown; breast and sides pale hair-brown, but 
slightly paler than back; belly and under tail coverts white; the longer under 
tail coverts sometimes with dusky shafts, and rarely with slight dusky subter- 
minal spots. 
This form is wonderfully constant in color throughout its 
range. I can detect no difference between birds from the south- 
eastern States and those from Washington and British Columbia. 
