CYPSELID.E — THE SWIFTS — PANYPTILA. 



547 



p. melailoleuca. 



than its digit. Ilind toe very sliort; lialf versatile, or inserted on the side of the tarsus. 

 Tarsi and toes featliercd to tlie claws, except on the under surfaces. 



Panyptila melanoleuca, Laird. 



THE WHITE-THEOATED SWIFT. 



Ci/psdiis melanolcucus, Baird, Pr. A. N. Se. Phil. VII. .June, 1854,118. (San Francisco 

 Mountains, N. M.) — Cassin, IUus. I. 1855, 248. — Pani/ptUa melamkiirun, Baird. P. K. 

 Rep. IX. Birds, 141. — Kennerlt, X. iv. 23. — Heer.manjj, X. v. 10 ; X. vi. 35 ; ]jl. 

 xviii. f. I (lower figure). — CouEs, Pr. Phih Acad. 1866, 57. 



Sp. Ch.\1!. Wings very long ; tail forked ; tarsi and feet covered with feathers. Black 

 all over, except the chin, throat, middle of the belly as far as the vent, a patch on each 

 side of the rump, the edge of the outer primary, and blotches on the inner webs of the 



median tail feathers, near the base, which are white, as is also a band across the ends of 

 the secondaries. Length, 5.50 ; wing, 5 50 ; tail, 2.70. Tris brown ; bill black. 

 Hab. Colorado Basin, New Mexico to San Diego, California. 



Dr. Kennerly discovered this species along Williams Fork of tlie Colo- 

 rado, on February If!, 1854, and remarks that large flocks could be seen at 

 any time in the vicinity of tlie canons, flying and circling about very high, 

 and far beyond the reach of shot, occasionally descending lower towards 



