THE GENUS CHOBDEILES SWAINSON OBERHOLSER. 



117 



whitish (the secondaries more so), and otherwise all white save for 

 broad dark brown ends ; the tips of the two inner secondaries some- 

 wiiat mottled with pale drab; innermost secondary and the tertials 

 light drab, mottled, vermiculated, and narrowly and irregularly 

 barred with broccoli brown, basally also with whitish and biiffy; 

 anterior rows of upper wing-coverts dark brown like the wing-quills, 

 much spotted, mottled, and imperfectly barred with buff and whit- 

 ish ; remainder of wing-coverts deep broccoli brown, spotted, barred, 

 mottled, and tipped with white, cream color, pale clay color, and 

 buff; sides of head and neck pale buffy gray, more buffy on auricu- 

 lars, which are narrowly and inconspicuously streaked with brown, 

 all the rest speckled, spotted, and a little streaked and barred with 

 broccoli brown, the streaks darker brown; lores anteriorly jvhitish; 

 an ill-defined superciliary stripe due to the sparseness of the dark 

 spotting; entire lower surface cream white, the jugulum with a wide 

 band of drab gray, obscurely spotted and barred with drab and 

 broccoli brown, the breast conspicuously spotted and imperfectly 

 barred with broccoli brown; inferior wing-coverts cream white, the 

 outer ones dark brown like the wing-quills, somewhat spotted and 

 edged with buff, ochraceous, and whitish, the posterior and longest 

 grayish drab ; edge of wing along the alula mostly buffy white. 



Measurements. — Male : ^ Wing, 172.5 mm. ; tail, 100 ; exposed cul- 

 men, 7.0; tarsus, 13.1 ; middle toe, 13.1. 



Female:^ Wing, 165.5 mm.; tail, 92.5 mm.; exposed culmen, 7.0; 

 tarsus, 13.1 ; middle toe, 13.9. 



Type-locality. — Bogota, Colombia. 



Geographical distribution. — Central Colombia. Probably a per- 

 manent resident. 



Remarks. — This species {Chordeiles rupestris) has hitherto been 

 unrecorded from Colombia, and it must be rare in that country. The 

 two specimens listed in the subjoined table of measurements were col- 

 lected at Bogota, Colombia, by Mr. W. Evans, and have been in the 

 United States National Museum since 1860. They seem to represent 

 a very well characterized geographical race. 



Measurements of specimens of Chordeiles rupestris xyostictus. 



1 One specimen, from Colombia. 



2 One specimen, from Colombia. 



' Used in measurement averages on p. 117. 

 *Type. 



