62 
420. *Chordeiles virginianus (Gmelin) —-NIGHTHAWE. 
The nighthawks breeding along the Missouri and a little westward 
are very clearly of this form, which occurs during migration over the 
eastern half of the state, but is not nearly soabundant as is sennetti 
westward. Arrives the second week in May, breeds in early June, 
departs before the middle of September. Omaha, Peru, Beatrice, 
Lincoln, West Point. 
420a. *Chordeiles virginianus henryi (Cassin) WESTERN NIGHTHAWK. 
This rufous form is the commoner one in Sioux county, though speci- 
mens nearer sennetti also occur there. During migrations it extends © 
eastward about half way across the state, flocking with sennettz. 
Indian creek, Warbonnet canyon, Harrison—breeding. 
420c. *Chordeiles virginianus sennetti (Coues)—-SENNETT NIGHTHAWK. 
This is the nighthawk of the whole western two-thirds of the state 
except in Sioux county where it is mostly replaced by and runs into 
henryi; it occupies this region to the complete exclusion of the other 
forms during the breeding season. It is the nighthawk of the sand- 
hills, where its conspicuous paleness makes its identity unmistakable, 
but eastward it intergrades with virginianus and is more difficult to 
distinguish. Antelope, Holt, Rock, Cherry, Dawes, Thomas, Dundy, 
Red Willow counties. 
EXTRALIMITAL: 418a. P. n.nitidus Brewster,the Frosted Poorwill, 
occurs as asummer resident in western Kansas and eastern Colorado, 
and may reasonably be expected in extreme southwest Nebraska, 
though there is as yet no specimen from that locality. 
Famity MICROPODIDA—Swirts 
1. Sooty, paler below, the throat gray, wings black; tail rounded. spine 
tipped. . shai ate .Chimney Swift. 
1. Black, under parte eaeee the aes Sie: ei paalced net Sply sass 
. White-throated Rock Swift. 
423. *Chetura pelagica (Linnaeus)—-CHIMNEY SwIFT. 
Eastern portions of state only, west along northern border to Ne- 
ligh, O’ Neill, Atkinson, and probably Long Pine, but rare west of the 
98th meridian. Arriving third week in April, breeding the latter 
part of May, and departing second week in September. Locally very 
abundant. Omaha, Lincoin, Beatrice, Peru, West Point, Niobrara. 
425. *Aeronautes melanoleucus (Baird)—WHITE-THROATED Rock SwirFt. 
Sioux, Scott’s Bluff, and Dawes counties, common summer resi- 
dent and breeder in the high perpendicular cliffs of that region. (See 
Carriker, Proc. N. O. U., III, pp. 81-83.) 
Famity TROCHILIDZ—Hvumminasirps 
1. Throat metallic red; males (2)—not wholly metallic red; females... .(4) 
2. Tail forked; outer primary broad, end turned inward; back 
golden green...................Ruby-throated Hummingbird. 
