419. Merrill Parauque (Nyctedromus albicollis mer- 
rilli). L. 12; T. 6.2. Outer tail-feather without 
white. Two color phases, one gray, one rusty. Ad. 
6. Outer tail-feather black with sometimes a little 
rusty, next feather white on inner web, third feather 
white except at base. Ad. 2. Outer tail-feathers 
brownish with broken rusty bars; next two with white 
at tip. Notes. A vigorous ker-whee-you repeated and 
sometimes running into a whit-whtt-whit, ker-whee-you. 
Range.—Mexico north to southern Texas; winters chiefly south of 
Rio Grande. 
K 420. Nighthawk (Chordeiles virginianus). L. 10; 
W. 7.8. Primaries blackish with a white bar and no 
rusty spots; darkest of our Nighthawks. Ad. o. 
Above black with white and buff markings; throat and 
band near end of tail white. Ad. 2. Throat rusty, no 
white band in tail. Notes. A nasal peent; and in the 
breeding season, a booming sound produced by diving 
from a height earthward. 
Range.—Eastern United States, west to the Plains; breeds from 
Florida to Labrador, west and northwest to northern California, British 
Columbia, and Alaska; winters south of United States. 
420a. Western Nighthawk (C. v. henryz).  Simi- 
lar to No. 420, but markings above rusty and more 
numerous; belly washed with rusty. 
Range.—Western United States, east to the Plains, wintering south 
of United States; exact distribution unknown. 
420b. Florida Nighthawk vr v. chapmant). Simi- 
lar to No. 420, but smaller (L. 8.6; W. 7.1;) and 
paler; white and buff markings above larger and more 
numerous. 
Range. Florida, west along Gulf Coast to eastern Texas; south in 
winter to South America. 
420c. Sennett Nighthawk (C. 0. sennett:). Simi- 
lar to No. 420b, but still paler, white and buff prevail- 
ing on back and scapulars; palest of our Nighthawks. 
Range.—Great Plains north to Saskatchewan; winters south of the 
United States. 
421. Texan Nighthawk (Chordedles acutipennis tex- 
ensis). Wing quills with rusty spots; outer primary 
shorter than one next to it; belly conspicuously washed 
with rusty buff. 4d. of. Throat-patch and band near 
end of tail white. Ad. 2. No white band in tail. 
Notes. A mewing call and a tapping accompanied by a 
humming sound. (Merrill. ) 
Range.—Central America; breeding north to southern Texas, south- 
ern New Mexico, southern Utah, southern Nevada, and Lat. 38° in 
California; winters south of United States. 
157 
Goatsuckers. 
