THE GENUS CHORDEILES SWAINSON — OBERHOLSEE. 



57 



Measurements of specimens of Chordeiles virginianus sennetti — Continued. 



Museum and No. 



A. N. S. Phila. 



26716.1 

 A. N. S. Phila. 



63941.1 

 L.B. Bishop 7882 1. 



L.B.Bishop 130841 



L.B. Bishop 77971. 

 L.B.Bishop 77981. 

 L.B.Bishop 62481. 

 L.B.Bishop 20301. 



L.B.Bishop 29521. 



Sex. 



[Female] 



Female . 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



Locality. 



Huron, S.Dak — 



Pembina, N. Dak . 



Adler, Nelson Co., 



N. Dak. 

 Stump Lake, Nel- 

 son Co., N. Dak. 

 do 



do 



Towner Co., N. 



Dak. 

 do 



Date. 



July— ,1881 



June 13, 1873 



July 31, 1902 



June 22, 1905 



July 26, 1902 

 do 



Aug. 9,1901 

 June 30, 1895 



July 31, 1896 





mm. 

 14 



16 



15 



15.8 



14 

 14.2 

 15.2 

 15 



15 



CHORDEILES VIRGINIANUS HOWELLI,2 new subspecies. -j— 



Chars, suhsj?. — Somewhat like Chordeiles mrginiaiius sennetti^ but 

 male with upper parts more rufescent and somewhat paler, the dark 

 brown ground color more rufescent, less grayish, and the light mark- 

 ings much more buffy or ochraceous; posterior lower parts more 

 buffy, and the anterior dark brown areas more rufescent. 



Description. — Type, adult male. No. 186731, U.S.N.M. ; Lipscomb, 

 Texas, June 25, 1903, Arthur H. Howell; original number, 105. 

 Upper parts brown, between hair brown and clove brown, much 

 spotted, mottled, and irregularly and brokenly barred, so that com- 

 paratively little of the ground color remains, with brownish white, 

 light brown, buff, and ochraceous, least numerously on the pileum, 

 most coarsely on the scapulars, and in the form of broad irregular 

 and broken bars on the upper tail-coverts, and of a more or less ob- 

 servable collar of broad buff and ochraceous buff streaks on the hind 

 neck; tail brown like the ground color of upper parts, crossed b}'^ 

 about 7 wide, irregular and broken bars, one of which is terminal on 

 only the middle pair of rectrices, these bars light hair brown or 

 whitish, and widest on the middle pair of feathers, and all the 

 rectrices but the two middle ones with a broad subterminal band of 

 pure white; wing-quills brown like the tail, the outer five primaries 

 crossed by a very broad band of pure white posteriorly to the tip of 

 the ninth primary (counting from the outermost) ; secondaries and 

 inner primaries tipped with brownish white; outer half or more of 

 the inner webs of secondaries and inner primaries with cream white 

 or buff bars, those on primaries broken or obsolescent; the tertials 

 mottled with light brown, brownish white, and buffy white, in the 

 form of broad but much broken and obsolescent bars ; superior wing- 



1 LTsed in measurement averages on p. 52. 



2 Named for my friend Mr. Arthur H. Howell, who collected the type specimen, 



13732°— Bull. 86—14 5 



